The bottom of the cylinders come clearanced from Rocket Racing for a 4.5-inch stroke with an aluminum connecting rod. However, the priority main system does bring about one unavoidable compatibility issue. Edelbrock techs are a phone call away to answer questions or help place orders. We pride ourselves in ensuring all products are We use cookies to provide you with the best possible user experience. Beyond that you might want to consider the DX block. So will this engine be for a weekend warrior, drag racer, circle track racer or basic street performance as an everyday driver? 455 Oldsmobile Stroker Crate Engine - YouTube Offering up to 135 horsepower from 303 cubic inches, it put a stock Flathead to shame. By continuing to use our site, you agree to their use. Another area important area is the connecting rod bolts. Not only was horsepower disappointing, but GM was also concerned about the engines ability to meet upcoming mandated emissions controls. The engine was used across the Oldsmobile lineup through 1976 and horsepower ranged from 275 up to 400. . Clearance was set by a steel shim that was inserted between the disc and the tappet. Why were they burgeoning? w/9.5:1 compression. 600 hp olds 455 rocket | Hot Rod Forum Edelbrock part #2058 Performer RPM Top End Kit is designed for 1965-76 Big-Block Oldsmobile 400-500 c.i.d. Of course we'll help you make the right decisions that will fit your budget, produce power and torque and benefit the most enjoyment with your new engine. The 455 block 425 is super close but ive had a tall deck olds motor in a G body and I made sure to look and it would be tough to get headers to a turbo and down pipe out the back of the car. Olds engineers discovered that when the two intake valves were fully open, there wasnt an advantage to the conventional two-valve head. DoubleV on the board here just put together a 350 DX with a 425 crank and C heads to the tune of 440 c.i. ROCKER SHAFTS The new big-blocks measured 400 and 430 cubic inches, with the 360-hp 430 being reserved for full-size cars and the Riviera through 1969. ft of torque. OW43 That's what we are here for! Theres not a lot of SFI-approved stuff out there right now, readily-available for the B.O.P. We'll send you raw engine tech articles, news, features, and videos every week from EngineLabs. At Eddies we use hypereutectic Keith Black or Speed Pro 10:1 compression pistons. The poor cast stock rings are not to be used in any application and is susceptible to failure under detonation. The block comes standard with blind holes threaded for a 1/2-inch head stud, with the option to upgrade to a stout 9/16-inch head stud. Even at the listed maximum bore size of 4.400 inches, there is still .200-inch cylinder wall thickness. Not until Chryslers HEMI in 1951 did Oldsmobile begin to feel the pressure and then, in 1955, with the small-block Chevy, it was all over. [ 4 times larger thrust bearing, 51% increase in needle diameter ]. from stock 455 motor even with DOHC due to compactness of 4-valve configuration. By now, youre probably wondering what kind of power levels were talking aboutwith respect to power level and material failures when using an OEM block. Alternator PS and AC add $ 2,540.00 Flat top, with two valve reliefs (52) Dish, with two valve reliefs (49) And, over at Lansing, Oldsmobile engineers were busy trying to figure out how to make the 4-4-2 with the W30 package even faster. Olds Power. 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All five main caps are billet steel, four-bolt pieces, and are sized for standard big-block Oldsmobile main bearings. Number Two: Dodge and Plymouth 426 Hemi . This condition can lead to instant death for a 455 that is run wide open for extended periods of time. (106) 7.100 in. Our cylinder heads and intakes alone are capable of making power far exceeding what the OEM blocks can handle, says John. The motor has a knock (appears to be a rod knock) so the thing has to come out. Make: OLDSMOBILE Engine Size: 7.5L/455 Individual Parts Part Groups In-Store Pickup Results 1 - 25 of 37 25 Records Per Page Default Sort Holley 4175 Carburetors 0-80555C Carburetor, Replacement, 650 cfm, 4-Barrel, Spread Bore, Electric Choke, Single Inlet, Dichromate, GM, Each Part Number: HLY-0-80555C ( 49 ) Our Tech Support Agents are second to none. And with the stock blocks, you just cant open them up enough to get the cubes people want from an Olds.. Inlet ports were not pinched. The Rings - While all rings may look the same there are many different materials used in the industry. Inlet ports were not pinched. Completely unrelated to either the 427 and 428, both which were based on the Ford FE block, the 429 was developed around the new 385 block (the name comes from its original crank stroke, not its displacement). 94 1. Image: Special-Interest Autos magazine. Four months later, and inspired by racing (on both water and land), Oldsmobile engineers decided to add dual overhead cams. 4.155 bore 455 N crank Stock rods TRW L2323. a Oldsmobile 455 Engine - Up To 625 hp There tends to be some truth in the phrase "no replacement for displacement" when it comes to small or big block chevy motors. With initial testing, engineers discovered that the cam lobes and pushrods were not holding up. Stock Oldsmobile 455 Specs: standard bore is 4.125, stock stroke is 4.250, stock rod length is 6.735, stock wrist pin size is .9805. A gear drive supported by roller bearings in an aluminum gear case handled the cam chores, while a dummy camshaft was used in the standard position for the oil pump and distributor. The initial head was aluminum with a layout calling for 1.750-in intake valves made of SAE 8640 steel and inclined at 22 degrees, and 1.375-in exhaust valves made of 214N austenitic stainless steel, and inclined at 15 degrees. There are many different olds engines, most notably the V8 small block versions like 307 and 350 cubic inch and the big block V8 oldmobile motors such as the 400, 425 and 455 ci. . Based on the power output listed above you can see why the Cadillac V12 program was killed. Along with Cadillac, Oldsmobile was the first to debut a high compression V8, which the burgeoning hot rod set heartily embraced. We have a pretty big barrel down there, so you could probably go 4.800- or even 4.850-inch in there.. it would be tough to get headers to a turbo and down pipe out the back of the car. Pontiac had just sold almost 100,000 GTOs. This is a necessity on this engine at current horsepower levels. The 455 is a very forgiving and long-lasting engine. The fix that will allow your motor to survive extended high-rpm runs is to restrict the oiling system and install a larger-capacity oil pan. Plus, there are people who want an all-new engine for their car, and the block was really the last thing that didnt exist. Not that im a purist but doing things the hard way is kinda rewarding in the end. Its unknown whether this project was purely for racing, or Plymouth had the intent to offer the motor in a street car at some point. W43 Two- or four-barrel carburetors affected horsepower, as did the compression ratio, which varied from 8:1 to 9.5:1. There are all kinds of automatic swaps that are exploding in popularity, like the 4L80E and the 700R4.. With the redesigned priority-main oiling system in the block, redesigned Rocket Racing solid-roller lifters need to be used. To start, John made sure all the critical thicknesses of the block were stout enough to handle extreme conditions, regardless of bore or stroke used. The camshaft is basically the brain of the engine because it controls the air/fuel ratio by opening and closing the valves. Thanks to Rocket Racing and their new aftermarket Oldsmobile block, the first is truer than ever, while the latter is no longer a factor. According to the engineers who worked on the project, the SOHC 421 engines produced around 625 hp and were capable of turning 7,000 rpm.
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