403 olds engine horsepower. I will be using valves and rockers from 403.

403 olds engine horsepower Pistons were custom from Mahle using Ls blanks. The stock 4A heads are *terrible*. We've written on these very pages about the untapped potential within the 403 Olds. CI-4 is same specification. I HAVE USED THIS EXACT SYSTEM MANY TIMES . Should be the same for the entire Small Block Olds line (260, 307, 350, 403) Butler has developed a new Top End Power Package to wake up the 403 Olds found in the later model Trans Am's. Jun 15, 2017 · From 1916 through 1922, the only Oldsmobile V8 was a 246. com or the October 2012 issue of Car Craft Magazine. There's lots of info on here and on classicoldsmobile. 0 to 1 compression ratio, which is pretty crappy lol, but the Olds 350 heads have a 64cc combustion chamber and give you around a 9. THIS KIT COMES WITH EVERYTHING YOU SEE IN PICTURE . (with rotating assembly kit). Collonade Hardtop Coupe versions offered for the year 1977 with complete specs, performance and technical data in the catalogue of cars. BTR built with BTR Girdle and BTR ported Edelbrocks. 5 to 1, Gen 3 Edelbrock heads, Olds 358 Mahle 1mm forged pistons, Molnar rods, 330 internally balanced crank, roller cam 218/218 . You'll end up starving the bottom end for oil. While accuracy is a main goal of this page, it is not guaranteed. Strengthening/Machining Cranks 1964 - 1990 Identification There are about seven types of cranks: Early series big block, short stroke, all forged. Eddies builds many oldsmobile motors a year with many different performance configurations that depends on the car and customer wants and needs. Cranks 1949 - 1964 Identification All crankshafts of this period are forged. 126-inch bore and 4. 400, 425's. The oiling systems in the Olds engines are just barely adequate for stock applications, and not adequate at all for performance applications, especially when you need to rev the engine up. The pistons look exactly like Mahle Ls. Jun 24, 2008 · Unfortunately its not going into a G-body, I built this engine for a '77 Pontiac Can Am, 1 of 42 high altitude cars that was originally equipped with an Olds 403 I did build the driveline to with a G-body in mind: 3. Our kit has all the machine work done for you to simply bolt it on. 6 engine. I'm planning a restomod starting with the suspension and brakes then working through the drive train and other mechanicals, so I'm not going to do anythin Jul 10, 2012 · (8) Engine Build Recipes: Solid Roller Camshaft Notes: Make damn sure to use Series 3 oil CD/SF rating. Olds rates duration at zero lift, while most cam manufacturers rate duration at . On a olds 403 do they have good power and how can you tell if its really a olds 403? Feb 28, 2019 · With that being said, here are the stock specs for my Olds 403 - 1977-79 403 are: 185hp @3600 RPM, 320ft/lbs @2200 RPM, 4. The 403 isn't a real popular engine for high performance builds because of the windowed mains, siamesed cylinders, oiling issues, and overall lack of available parts at good prices compared to many other engines Apr 13, 2024 · The last and largest engine for the 1977 Pontiac Firebird is the Oldsmobile 403 V8, which basically has the same structure as the previously mentioned Oldsmobile 350 V8 engine, but the main Apr 29, 2012 · The Olds 403 has open windows in the main saddles making the block structurally compromised, requiring a main cap girdle and oil gallery restrictors just to reliably support 400 hp. For the 2004 season, I built a new 403 cubic inch, NASCAR small block Oldsmobile engine, and set the car up to race in the National Street Car Association’s (NSCA) Limited Street class. The Pontiac 400 has a higher Nov 7, 2015 · Pontiac installed a variety of engines in Firebird and Trans Am models over their 11-year production run: everything from the anemic Chevrolet inline 6-cylinder all the way up to the powerhouse 400 Ram Air III and IV as well as 455 Super Duty engines. 5:1). 6L Litre". Did Oldsmobile make a 455 engine? Oldsmobile’s 455 was produced from 1968 to 1976 as the Rocket 455. Ran pretty good with a few changes. com 1 877-215-1800 TOLL FREE OLDSMOBILE PERFORMANCE PARTS AND ENGINES. So you can see, I NEED more compression ( a full point ). Feb 27, 2002 · Brook, not asking for much are we. 0 to 1 comp. The forged crank from a 1964-1967 Olds 330 motor drops right in to a 403. Mar 25, 2004 · Hey, Well I have another question on a oldsmobile motor. 0 Oldsmobile Crate Engines:Eddies Performance Motors-High Performance Engines, Crate Engine, Racing Engine Builder, Rebuilt Motor: 732-727-2325; Raritan Street, Sayreville, NJ 08872; Oldsmobile/Cutlass 5. Firebirds and Trans Ams fitted with the special high-performance engines In 1968 the legendary 455-cid V-8 producing 365 horsepower came to life and is sought after today by Oldsmobile enthusiasts. $4k goes fast, so plan carefully. According The 403 was made from 1977 to 1979 and used across the Buick, Olds, Pontiac and Cadillac vehicle lines. Someone changed the hood scoop decal on this car to the designation for the Pontiac 400 cubic inch V8 engine. Using this rule of thumb on an engine that produces 400 hp, every 1 point change in compression ratio will result in approx. We were able to squeeze 210 HP and 325 TQ. To celebrate the workhorse Pontiac V-8 (sorry Olds 403, today’s not your day) we’ll highlight some of our . I plan on only Oct 25, 2017 · Joe Mondello once noted the 403 Olds as being an overlooked performance engine and somewhat of the “unsung hero”. ratio. Stock specs on a 1977-79 403 are: 185hp@3600 RPM, 320ft/lbs torque @2200 RPM, 4. Jun 20, 2024 · One of the most common engines found in the 1979 Pontiac Firebird is the 403-cubic inch Oldsmobile V8. It is obvious from the pictures that this is not the L80 Oldsmobile 403 cubic inch V8 engine which has an oil spout on the front of the engine. 286 Lift, 0. 6 pushes up to 220 horsepower and could be fitted with a manual, four-speed transmission. The cylinder walls are thin. May 1, 2011 · Jeff Smith: The story you are referring to ran in the May '07 issue where we used a stock, 6. If nothing else, it proves that the 403 can be made to fly) I knew someone who got an ’81 Turbo T/A from their parents as a HS graduation present. Jun 2, 2025 · Oldsmobile engine problems? We have used, rebuilt, and remanufactured Oldsmobile engines for sale with fast flat-rate shipping and up to a 5-year, unlimited mileage warranty. Here are the main issues on the 403: Boring over 0. 00 stroker cranks. 1959-75 Oldsmobile engine torque value charts give you the correct bolt tightening requirements to prevent damage. See All 3 Photos3 Jul 24, 2009 · I have done a couple of 403 Olds engines that ran quite well with the lower compression pistons, cam was a little tricky as the fulcrums on the rockers are not really set up for High Perf, it did repond very well to opening up a stock Qjet carb intake, I made it a double plane but removed the material from one bore to another. P . Apr 3, 2024 · The Oldsmobile 403 was a pretty short run engine produced from 1977 through 1979 and while it appeared in some performance minded cars of the era like the Firebird, Buick Riviera, and Olds 442, it has never really been looked at as a serious performance engine by the larger hot rodding populous. We offer a full machine shop, in house engine dyno, and parts supplier serving the local Wisconsin area and worldwide. Nov 24, 2012 · LMAO! Obviously this guy doesn't know **** from shinola when it comes to engines. Jul 21, 2009 · FYI, all Olds small block gasoline engines from 1964 to 1990 use the same stroke and bearing sizes. 0:1 compression ratio, with 80cc combustion chambers. Stock HP was 185 back in the day. Rocket Racing & Performance is a custom engine building facility that specializes in Oldsmobile Performance. This Olds 403 engine rebuild kit includes all the essentials, from pistons to timing chains, that guarantee a smooth and reliable overhaul. 385 bore Dec 19, 2019 · Did Oldsmobile make a 455 engine? Overshadowed by the likes of Chevrolet and Pontiac, Oldsmobile delivered one of the mightiest, and most versatile big block engines of the period: the 455 V8. 3) in 1977, the model with 4-door sedan body and V-8 6598 cm3 / 402. The Oldsmobile 350 is an entirely different engine then the famous Chevy 350. Our team of skilled technicians are experts in remanufacturing Oldsmobile Engines. The 403 Olds was an option for most of the 1979 Firebird lineup and standard issue for the Generation Two Oldsmobile V8 260, 307, 330, 350, 400, 403, 425, 455 Cid Firing Order Torque Specs These specs may not be correct for your application. ST = standard trans AT = automatic trans 2BC/4BC: 2 or 4 barrel carb OAI = outside air induction Roller lifters and cams were in all 1986 and up 307's, and most 1985 307's. Oldsmobile 403 Parts in-stock with same-day shipping. Dec 22, 2004 · I recently purchased a 67 Vista Cruiser with a 77 Pontiac 403 engine in it. 030" over stock quickly leads to overheating issues. According to my trusty Olds engine book, the 455 was available in 310 hp, 320 hp, 365 hp, 370 hp, 390 hp, all street engines, with full manufacturers warranties. Also, on the show the HorsePower guys show you how to tune your truck hauler for better performance and fuel economy. Oldsmobile Full Size 1970-88 Delta 88, Royale and Brougham, Custom Cruiser, Ninety-eight Luxury, Regency and Brougham Engine Nov 7, 2013 · I recently inherited a 1977 Trans Am SE with the original Oldsmobile 403 and automatic transmission. Everything else is full custom. 013 Exhaust 0. 6 Liter engine can reach a horsepower output of 185 and is only available with automatic transmission. To eek out more HP you can go with higher compression, which will prevent pump gas usage (highest stock 455 comp. Mar 21, 2024 · Discover the specifications and maintenance guide for the Pontiac 403 engine, a powerful V8 with durability and optimal performance. NO COMPANY DOES THAT These are… Dec 22, 2018 · Along with the stroker 403 upgrade, I plan on the Sniper returnless EFI module. The crank is one of a handful custom billet 4inch stroker cranks using chevy rod journals to work in an Oldsmobile. So what engine is this? Shop Oldsmobile 403 Parts and get Free Shipping on orders over $175 at Speedway Motors, the Racing and Rodding Specialists. 060 May 27, 2005 · Once I verify that the engine works fine I'll put on a set of Olds 350 heads '7' casting, do the ignition, rebuild the carb to match, and swap the 350 out for a beefed up one. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Nienty-Eight Regency Sedan 403 V8 (aut. 5 cui, 138 kW / 188 PS / 185 hp (SAE net) of power, 434 Nm / 320 lb-ft of torque, 3-speed automatic powertrain offered since October 1977 for North America . Verify your engine specs with a service manual for your year and model. I can't see why the same power levels shouldn't be achieved with an Olds 350 or 403! Nov 22, 2015 · The 403 olds was a good reliable engine but it really needed another 100 hp. These are cast from virgin A356 aluminum and are heat treated to T6 specs. 5-10. 403 block with one of my 4. You want tire smoking torque then toss that 2. This was the only engine offered in 1923, when the Model 47 continued alone. I have the opportunity to acquire a set of SBO Edelbrock heads on the Jul 13, 2020 · How much horsepower does a 403 have? While working on our Blue Collar 454 build appearing in this issue, we spent a lot of time at JMS Racing Engines in El Monte, California. the 403 Olds or even a 350 Olds can make more than enough power to make your car a blast to drive. Will protect pushrod ends from wear. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Pontiac Firebird Trans Am 6. = 215 @ 3600 rpm, torque = 370 lb-ft @ 2400 rpm 1977 403 Compression ratio=8. I can't see why the same power levels shouldn't be achieved with an Olds 350 or 403! Generation Two Oldsmobile V8 260, 307, 330, 350, 400, 403, 425, 455 Cid Firing Order Torque Specs These specs may not be correct for your application. THIS IS THE SAME HEADS THEY HAVE FOR A BETTER PRICE . K. 050" lift. They have an "L" or "check mark" shaped notch on the drive flange. 351 x 3. Description Master Overhaul Kit 1977-1979 Oldsmobile 403 Revitalize your Olds 403 engine with our complete rebuild kit, designed to bring your engine back to life. May 12, 2010 · A total of 117,108 Trans Ams were built in that year and just 8,326 of them received the T/A 6. Even the sealed power bearing catalog shows a wide variance. It was sort of meant to replace the previous use of big block engines in the BOP line. Cam, crank and piston specs unknown. Originally came out of a 77 Trans Am. I have a TH350 behind it and 3:73 gears out back. Oldsmobile 307 was produced from 1980-1990 and the 350 was produced from 1968 thru 1980. Assembling a 403 olds and finding bearing clearance specs ranging from . Of course that means replacing any chunks of hose in the system but not adding a return line. Jan 10, 2011 · The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. A LOOK AT THE OLDS V8'S THROUGH THE YEARS Jan 1, 2023 · The Edelbrock Olds head doesn't care what engine it goes on, but because the small-block is narrower than the big-block, the 403 must use a small-block intake manifold. Is the Oldsmobile 403 a big block engine? Oldsmobile vehicles equipped with the 403 CID: Buick vehicles equipped with the 403 CID Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Nienty-Eight Regency Sedan 403 V8 (aut. 5A heads have no roller lifter, 7A heads have the roller Jul 6, 2003 · PY Online Forums - Bringing the Pontiac Hobby Together > Classic TECH- specs, codes, resto issues FORUMS > 77-81 Firebird & Trans Am TECH > Widowed Mains IT WILL FIT ANT 403 SMALL BLOCK OLDSMOBILE . Dec 1, 2012 · Video: This time HorsePower rescues a discarded Olds 350 for a budget build. Car & Engine Information Please provide details about your engine needs below as well as information about your engine and car such as engine size, year, make, and model. Dec 19, 2008 · I rebuilt my Olds 403 afew years ago -- a basic rebuild with stock ported/polished(cheap job) heads, cam upgrade (Edlebrock performer) and flat top pistons. The remainder received the Olds-built 403 or Pontiac 301. Specs: Short Duration Comp EX Timing 68-38 in timing. 7 cid L-head of Model 47 with a 233. Nov 21, 2009 · 403 power Non Pontiac Motors in PontiacsPY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Non Pontiac Motors in Pontiacs > 403 power Oldsmobile FAQ Crankshafts section. Jan 7, 2004 · Technical Information Back to Technical Information Index Engine Torque Specs DISCLAIMER: This page is not intended to replace the information contained in a factory level service manual and is intended solely as a "Quick" reference. An easy ID is the heads. I will place an order for the 44 rods you suggest. Jun 7, 2021 · Off the shelf Comp cam choice for 403Sorry sometimes I think people can read my mind LOL of course my mainly stock 403 Oldsmobile engine still with the stock cam in it from 1979 just looking to make it maybe sound a little better and improve torque and a little more horsepower. I will be using valves and rockers from 403. Contact Mr. Dec 8, 2011 · These engines have some oiling issues that should be addressed as well in a high performance application. The W72 engine came only with a 4-speed transmission. That seems like a big difference from stock and makes me think it would be excessively fat! Why such a huge change? Also how about the secondary side and the use of recipe one? Thanks! Nov 16, 2008 · We always felt that if Olds had stayed in the performance game in the 70's (instead of pulling their best performance engineers and making them emissions engineers) and put this engine in the 79, 83 or 84 Hursts (or any G body Cutlass), they wouldn't have got the image as the Gutlass Cutlass and it wouldn't only be us old farts that grew up Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Custom Cruiser 403 V8 in 1977 the model with 5-door station wagon body and V-8 6598 cm3 / 402. always torque bolts in three equal increments Butler Performance, a long-time authority in V8 performance, offers targeted, high-impact solutions to unlock the true potential of the Olds 403 engine, providing a path to reliable HP and torque, turning the late-model Trans Am into the performer it always should have been. The 403 olds, a forgotten smog era 180 hp engine with some interesting features and missed potential It had some good potential features like a decent port layout, better flowing heads than a Windsor, and an absolutely bonkers huge bore size of 4. 842 in (21. 541/. 403 Oldsmobile engine. As you can hear, this engine has an Jun 9, 2022 · The Pontiac 400 and the Olds 403 are both V8 engines that were manufactured in the 1960s. Butler uses only high quality crankshafts, rods, and pistons in their rotating assemblies as well as stock's many assemblies from brands such as Eagle, Scat, Callies, and more. 25-inch Apr 17, 2007 · Building The 403 Olds "Very few owners build 403 engines for their Trans Ams, and I wanted to be different," says Craig. Checking out an old 403 Oldsmobile I built 30+yrs ago. Find top brands, exclusive offers, and unbeatable prices on eBay. The engine is just shy of 200K miles and I'd like to replace it with: a long-lasting V8 that produces around the same torque, but ~300 horsepower. May 11, 2024 · Oldsmobile's best engines powered some of the brand's most famous and beloved cars, defining an era of classic American muscle. 0005 to . How much horsepower does a 5. A. Seems like everyone I ask says get rid of the 403 and put in a 455. Aug 23, 2009 · As I have wrote in earlier topics I'm still having my 403 engine rebuild This is being rebuild and balanced this week in the machine-shop by an experienced machinist . 351” Extremely held back by its malaise era 7. com (CO). Your not willing to spend $1500 for heads but want to stroke your 403 with a 455 crank? Do you own a machine shop?<P>Honestly that performer intake will feed your engine just fine. I wouldn't even bother trying to make more than that with a 403, since those windowed mains make the block too flexible to handle a high hp build. My question is with regards to the Edelbrock SBO aluminum heads. 403 Olds engine cleaned and bored . Bernard Mondello spent his formative years learning about racing engines and cylinder heads from the very best in the business—his father, Joe. 024 - Keith Black hypereutectic flat top pistons KB405024 - Mondello SG-490 Halo Usually, if some camshaft for the Olds 403 costs more, it’s a price for additional features or a kit. 6 cui, 138 kW / 188 PS / 185 hp (SAE net) of power, 427 Nm / 315 lb-ft of torque, 3-speed automatic powertrain offered since October 1978 for North America Jan 1, 2023 · Long-time Oldsmobile engine-builder Dave Smith (Precisioned Speed, Anaheim, California) figured he'd need about 950 horsepower to put this one-ton package into the 7-second zone. One leg much longer than the other, one corner, one leg It seems that Chevy 350 engines routinely exceed 350 hp in totally streetable engines, and often get nearer the 400 hp mark with good cylinder heads. Nov 16, 2021 · Small-Blocks Oldsmobile small-block V-8s consisted of a variety of cubic-inch models, including the 260-, 307-, 330-, 350-, and 403-ci engines. It was also used in other applications like motor homes, boats and some industrial applications. 7 cid V8 that made 60 hp. 7L/ 350CI 1967 - 1979 Chevrolet General Motors Oldsmobile, Pontiac 5. Port matched Victor, 850 QF, 10. Dec 21, 2011 · I have a 1979 Trans Am with 403 Olds engine. Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Custom Cruiser 403 V8 in 1978 the model with 5-door station wagon body and V-8 6598 cm3 / 402. Specifications May 18, 2017 · The 1977-1979 403 CI/185 HP "corporate engines" were installed in California Trans-Ams and in some full size Pontiac, Oldsmobile, Buick and Cadillacs throughout the United States. We sell Kooks headers Ultra Dyne cams and most other performance parts for Olds Mr Olds is on this Sep 8, 2016 · Here’s one by nrd515 describing how he got a 403 Olds-powered ’79 TA to run 13. Anyway, point being does anyone know the torque specs for the 403 or know where I can get them. However, it has increased the cars’ performance like the Firebird, Buick Riviera, and Olds 442. I need to know if 403 push rods can be used. I am not building a max-effort engine either. While it's not a dog, I would like something a little more lively. Terry he will talk to you on the phone, super nice guy FCR PERFORMANCE . THEY COME READY BOLT ON DRILLED FOR 1/2 HEAD BOLTS . Oct 4, 2009 · The 185 hp (138 kW) 403 Oldsmobile powered cars had "6. We've also made a point to state how the one major weakness of this otherwise decent performance block has been their windowed main bearing webs, which don't have much strength to support big power. The Rods are Ls. 5 cui, 138 kW / 188 PS / 185 hp (SAE net) of power, 434 Nm / 320 lb-ft of torque, 3-speed automatic powertrain offered since September 1976 for North America Jan 1, 2023 · MODERN OLDS V8 ENGINE SPECS A variety of aftermarket and stock 4-barrel intakes are offered for big and small-block Olds engines, but only Offy makes off-the-shelf tunnel rams (upper right) for Jan 3, 2022 · The Oldsmobile 403 6. Already installed in engine before I obtained it. May 23, 2014 · Travato and Mondello both agree (on one thing at least. I think most fellows who have good luck modifying factory cylinder headed Olds engines are aware of the cylinder head's limitations, and try to come up with a parts combo that will produce max power peak at a lower rpm. This means that the Pontiac 400 is a little bit bigger than the Olds 403. 3) in 1978, the model with 4-door sedan body and V-8 6598 cm3 / 402. cars. 385 bore/stroke, 8. May 26, 2021 · The only thing Olds is the block, water pump, and valve covers. Feb 1, 2005 · Now, all Olds engines have oiling problems. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Nov 24, 2003 · Connecting rods interchange between these engines, and all but some of the 260 and 307 offerings feature forged rods. The Sunnen CK 10 cylinder hone does a great job of honing cylinders round and with little distortion. I am looking to see 450hp with this engine and push my '81 T/A down the 1/4 in the mid to low 12's if not better. 0L short-block to make this power. What's your take on them? Has anyone ever built one for power? Specs datasheet with technical data and performance data plus an analysis of the direct market competition of Oldsmobile Cutlass 4-4-2 403 V8 Turbo Hydra-Matic in 1977 the model with 2-door hardtop coupe body and V-8 6598 cm3 / 402. always torque bolts in three equal increments Sep 24, 2019 · Just a thread to talk about and give thoughts and opinions of the Olds 403's in the '77 and '78 Rivieras. 6 Liter” badging on its Trans Am shaker hood scoops to have us thinking about everything Pontiac 400. For years piston forging designs used by performance piston manufacturers have been based off Small or Big Chevy, Ford, etc. P. For high-performance use, the 350- and 403-ci versions are the most popular with Olds enthusiasts. 7:1, hyd roller running solid roller Aug 28, 2012 · JMS Racing Engines shows off their 500hp, 403ci Oldsmobile engine. Specifications listing Dec 7, 2008 · The stock 403 heads have an 83cc combustion chamber and get you about an 8. That’s not a bad thing; any day away from our corporate cube farm is a good thing. The 455 is a very forgiving and long-lasting engine. COMPLETE 69 CC OLDSMOBILE ALUMINUM HEADS , MACHINED EDELBROCK PERFORMER RPM INTAKE MANIFOLD , PRO MAGNUM STAINLESS STEEL ROLLER ROCKERS AND POSI LOCKS ,GUIDE PLATES , 3/8 80 PUSHRODS , AND A 520/542 CAMSHAFT AND LIFTER SET . 73 rearend and pickup a set o What are the specs of a 403 Oldsmobile? · How much horsepower does a Oldsmobile 403 have? The 185 horsepower from the Olds 403 sounds meager—especially for a Trans Am—but few other contemporary engines were making more power from similar displacement. An Edelbrock manifold and Brawler carburetor were added for a bit more power. 08 Type O, 88 CSC RIP, 94 Z71 Olds 350 TBI, burned to the ground, 2000 Dodge Dakota 5. Nov 19, 2009 · Seems like some people love them and others hate them. Oct 29, 2021 · 403 Olds Rebuild This 403 Oldsmobile came to the shop for a stock restoration build. I like the idea of the Qjet flange Sniper with the fuel line positioning and air cleaner positioner for a factory style Mar 26, 2007 · I don't know first hand, having never had cars with 350, 403 or 455 engines, but the 330 is suposed to have the best throttle response of the Oldsmobile engines. I am in the process of changing the heads to Olds 1970 350 heads. The 403 was made from 1977 to 1979 and used across the Buick, Olds, Pontiac and Cadillac vehicle lines. The Pontiac 400 has a displacement of 400 cubic inches, while the Olds 403 has a displacement of 403 cubic inches. The lowest-output small block was the 1975-76 262 V-8 rated at 110 horsepower. In 1987, Bernard Mondello Racing Enterprises was born. 440 Settings: Intake: 0. Trust Thunderbolt Engines and Transmission for top-quality engine rebuilding services. Apr 12, 2021 · It appears your '79 has the Oldsmobile engine that lacked power, even without the California restrictive emissions. A bare block comes in around 170lbs where as an early 350 would be around 195lbs and a 455 is around 205lbs (block only). It had the same 0. This ad is for a pair of complete assembled aluminum Oldsmobile cylinder heads for 350-403 & 400-425& 455 engines. Historically the "T/A" prefix on the hoodscoop noted that it was a Pontiac sourced engine, and those ending in Litre were non Pontiac, with the exception of the 1976 50th Anniversary Pontiac Trans AM model and the overhead cam 6 cylinder, used rarely, but the firebird in 67 bore May 24, 2003 · PY Online Forums - Bringing the Pontiac Hobby Together > Classic TECH- specs, codes, resto issues FORUMS > 77-81 Firebird & Trans Am TECH> pontiac 400 olds 403 Reply Apr 6, 1999 · Some had recently asked about the difference in power between the 403 and 455 engines. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass. to move these 4,000 lb. Ton of intake work done by wilson manifolds Jan 24, 2024 · . "I was looking for 350-400 hp and really didn't know what was available for Mar 2, 2025 · The rarest engine in a 1979 Trans Am was the W72 Pontiac 400 cubic inch V8 engine which was rated at 220 horsepower. The 350 is in use for my skylark at the moment but i wouldnt mind turboing that down the road either. The 403-ci Oldsmobile engines were slotted inside these cars also. Discover high-quality rebuilt Oldsmobile crate engines for reliable performance and precision engineering at Precision Engine Rebuilders. Aug 26, 2020 · The car is equipped with the base engine for 1979 which was the Oldsmobile 403 cubic inch V8 engine that delivered 185 horsepower and 315 lb ft of torque. After picking up the Harbor Freight engine stand I put it to the test and take apart my 403 Olds motor and discuss why Pontiac used the 403 Olds. Dan's 478 - Dan and Bill have already posted this on FB but thought I'd put it here as well. The Olds 403 is perfect for a stock restoration or a daily driver, and also has performance motor potential. 0035 depending on what manual I am looking in. 921 in (23. Wrap-Up: The Best Cam for an Old 403 Oldsmobile 403 was a pretty short-run engine. Ls fuel rails and ignition coils. Remanufactured Engines Oldsmobile Olds The vast majority of Trans Ams in 1979 will come with tamer 403-cubic­-inch Oldsmobile engines, basic utility devices that lend low-end oomph to other basic utility devices such as Catalina and Mar 10, 2010 · Is there really difference between the 400 poncho and the 403 olds? What are th main differences besides maker and CID? Oh, for 1977. When really thinking about it, how many Olds 403’s have you seen torn up or prematurely worn out? Feb 29, 2012 · 403 guys chime in Ive got an Olds 403 out of a 1979 transAm, and am curious what can be done with it. Currently the engine runs and drives great, no issues excepting the inoperable choke and the general sluggishness. All Oldsmobile 4-4-2 3rd-gen. Through our research and development program we have learned exactly what these Oldsmobile engines are capable of, mechanically and throughout many different horsepower and torque levels. The Pontiac 400 T/A 6. 5:1 Net H. = 200 @ 3600 rpm Nov 19, 2010 · Were set on the 403 for now cuz the engine was free, and we have a ton of olds 455 stuff laying around. They are both powerful engines, but there are some key differences between them. The engine did make 551 hp at 6,800 rpm using the more aggressive Often underrated, the factory-installed 403 was choked by low compression and emissions-era compromises, producing a modest 185 hp. Sep 18, 2013 · I would like to build for street performance and torque, not Max HP. With a frugal selection of performance upgrades, the goal is to double the original factory horsepower output. I'd build a 260 diesel block with good iron oem 350 heads, and hide the turbo using olds factory iron exhaust manifolds for a 350 with the crossover and single exhaust . Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. funny how two "gurus" can have such different opinions on Olds engines) that a lot of these older car's outer rings slip quite often. 5 cui, 138 kW / 188 PS / 185 hp (SAE net) of power, 434 Nm / 320 lb-ft of torque, 3-speed automatic powertrain offered since September 1976 for North America After many years of working closely together, Butler Performance and ROSS Racing Pistons have developed a new line of Performance Forged Pistons for traditional Pontiac engines base on a new Butler exclusive forging. . 7:1 compression and a cam smaller than a ford guys The rule of thumb for the compression ratios run in most street engines is: for every point change in the compression ratio your power output will change by 2%. This car won't be a racer, but needs more guts Rotating Assemblies & Stroker Kits Rotating Assemblies & Stroker Kits The rotating assembly, or stroker kit, is the heart of a high performance engine. 4 mm)-diameter lifters of the first-generation Oldsmobile engines, rather than the standard 0. This top end kit can push a 403 to upwards of 390hp and 405lbs tq. Dec 9, 2021 · Welcome to the Olds world! The learning curve can be steep, but it's a lot of fun. 5 cui, 138 kW / 188 PS / 185 hp (SAE net) of power, 434 Nm / 320 lb-ft of torque, 3-speed automatic powertrain offered since September 1976 for North America . Big pistons and a short stroke are an excellent combination for a high-RPM engine, but here the other inherent 403 weakness comes into play: Windowed main webs, and to a lesser extent, siamesed cylinders. Dec 21, 2010 · It seems that Chevy 350 engines routinely exceed 350 hp in totally streetable engines, and often get nearer the 400 hp mark with good cylinder heads. 0:1 and 10 Feb 15, 2003 · Find detailed Oldsmobile torque specifications for various models, helping enthusiasts and mechanics with accurate information for maintenance and restoration. 541 112 LSA, 2350 stall 2004R, 3. Converting to an EFI, if correctly set up and tuned for your 403, would improve performance and get much better gas mileage than with a carburetor. There's a Jun 6, 2019 · The calendar on the wall shows it’s 6/6—close enough to Pontiac’s iconic “6. Many of these fast oldsmobile engines find homes in cars like the cutlass, 88, 98, or the 442 Jan 1, 2009 · Check out these V8 Oldsmobile engines that are still used throught the world of Hot Rodding and used to be used in the world of NASCAR inside Street Rodder Magazine. 6-litre V8 automatic in 1979 the model with 2-door fastback coupe body and V-8 6598 cm3 / 402. They are manufactured using their gravity casting process, which ensures a more uniform and robust casting. Mar 20, 2009 · However the 403 does weight less than the typical earlier SBO engines. low compression and small cam But its got a huge Bore and a comparatively short stroke Jun 15, 2009 · Mr Olds will help you build a 403 that will run with the BBC Guys, Call Him. Easiest way to accomplish that reduce chamber volume. Olds A. I have some data in my file that show the following: 1976 455 Compression ratio=8. only other thing added to the stock motor is the number seven heads to increase compression Jun 6, 2014 · 69CC 403 OLDSMOBILE COMPLETE ALUMINUM HEADS This ad is for a pair of complete assembled 69CC aluminum Oldsmobile cylinder heads for 403 AND LATE 350 engines. AS A FACT , THIS EXACT SET-UP DYNO TESTED AT 440 HP WITH A 850 CARB AND A OVER 475 WITH A 950 . 7 Chevy have? Tuned-port fuel injection “TPI”; 230 HP; aluminum cylinder heads; compression varying between 9. Check it out at carcraft. One area of concern on these engines is the oiling system. 35/105 in the quarter mile. Shop now for fast shipping and easy returns! HERE’S A COMPLETE LATE 350/403 OLDSMOBILE ULTIMATE TOP END KIT . Originally rated at only about 185 hp. The best factory connecting rod for the small block Olds is the 403 part number 555142, but stock rods won't be a problem on the typical street motor. Get the best deals for Oldsmobile 403 Engine Complete at eBay. was 10. Oldsmobile Performance and Racing Engines By Eddies Oldsmobile performance and racing engines are the most popular motors that go through our machine shop. We provide full-service installation and nationwide shipping, ensuring your vehicle performs at its best. Jun 8, 2022 · Plus, the naturally-aspirated Olds 403 can be modified to produce around 600 horsepower. We are known for our high quality,attention to detail and meeting our customers goals. 7L OHV 2v V8; Iron Engine Block; Performance Cylinder Heads (Iron); 4-Bolt Main; Flat-top Pistons; Street Performance Camshaft (torque-biased); Horsepower 350+ (typical); Professional installation recommended. Mar 10, 2010 · Hey everyone, I have a olds 403 sitting nice and covered up outside thats all complete exept for the carb and dizzy. Feb 1, 2010 · 403 OLDS SET-UPHey Cliff, I used a Hygrade Bluestreak kit for the rebuild. 4 mm), which let engineers increase the camshaft's ramp speed for more power, 385 hp (287 kW), without sacrificing idle or reliability. THIS IS THE 77 CC HEADS DRILL FOR 1/2 HEAD BOLTS . I have my 403 build documented here. com. I know there aren't a lot of those years out there and would be curious to know how many came with that particular engine. Jan 2, 2018 · olds 403 clearance specs looking for acurate info by crazycuda » Tue Jan 02, 2018 12:19 am Anyone here do much sb olds building who could give some incite. From what I have found online, Its got the same problem lots of engines from that smogger era have. 73 posi, TH2004R, CK Performance billet HS converter and cant forget the Lightning Rods One of the dyno runs to 5k rpm: Jan 16, 2020 · Racing and High Performance - Dr. Anybody here done any performance upgrades to theirs? Askin for a fr If you look at a dyno sheet from an engine producing very high hp at high rpm, the torque and hp lines still cross at 5250, but the hp continues to climb. It was disappointing, to put it mildly. It featured a 4. It is rated at 638 horsepower, making it the most powerful engine ever produced by GM for a regular-production car. 015 Stroker Oldsmobile by DON_WOW (HAMB) C-T Automotive sold 5/8s stroker arms, lots, used with . Stock specs on a 1977-79 403 are: [email protected] RPM, 320ft/lbs torque @2200 RPM, 4. 38-68 in Duration. I am not going to do that. Check out my Aug 5, 2019 · 70 Cutlass S, Forced Air 9. Explore a wide range of our 403 Oldsmobile Engine selection. a 8hp change in output. 9 swap, 2017 Dodge Challenger GT AWD Go Green 35 mpg Imperial. dvluckjv xgegr non hvts ofm qumruj cho fhpocuob mybhl eoxwu dyiawn qint ipcg myv uzwzw