I figured that this info would be all over googleland, but I haven't found a good source. In 57, the 283 hp 283 was the first year for 1 hp per cubic inch. It was in the 57 Corvette. I am curious what that specific combination was. I need real data, not what you remember or heresay. Thanks Root
This was on the "Let's Build a 265 Chevy V8" thread.... <!-- icon and title --> Re: Let's Build a 265 Chevy V8!!!!! <hr style="color: rgb(229, 229, 229); background-color: rgb(229, 229, 229);" size="1"> <table border="0" cellpadding="6" cellspacing="0" width="100%"><tbody><tr><td class="alt2" style="border: 1px inset ;"> </td> </tr> </tbody></table> Based on these stories heres what I found. Hope everyone enjoys this. Compression ratio options kept going up and up every year and the over the counter stuff got better too with every year ending in 57. You can read the rest of the stuff here and also the Mculloch super charger options if you had deep pockets. click! 1955 Chevy 265, Edelbrock tri power intake, other factory goodies, Mculloch twin supercharger set up. 1955 All new 265 “ v8 with 8.0:1 compression in 3 configurations. Base -Turbo Fire 2brl 162hp Optional (Power- Pack) Super Turbo Fire 4brl 180hp Corvette racing edition rated 195hp with added Corvette camshaft and springs to the Power- Pack version. Factory Power Kit: They could supply you with an over the counter 4 throat carburetor with matching intake manifold and dual exhaust system for a much lower price. 1956 Updates: 4 different 265 engines Base -Turbo Fire 2brl 162hp Turbo Fire 2brl 170hp (automatic) Super Turbo Fire 4brl 205hp (improved cyl. Heads increase in compression 9.25:1) Corvette racing edition 225hp with “new” twin four barrel carburetor optional late in the year RPO "449" Duntov camshaft 240hp. Factory Power Kit: The much awaited twin four barrel carburetor/ aluminum intake setup and “Special High- Lift Camshaft” a solid lifter type known as the “Duntov” camshaft, and improved Super Turbo Fire cyl. Heads. 1957 Updates: 7 small block v8 configurations. The “new” engine a bored out version of the 265 now displacing 283 cu. in. was available. Base -265 Turbo Fire 8.0:1cr 2brl 162hp Base -283 Turbo Fire 8.5:1cr 2brl 185hp Super Turbo Fire 9.5:1cr 4brl 220hp Super Turbo Fire 9.5:1cr (2x4 carbs) 245hp Super Turbo Fire 9.5:1 (Fuel Injection) 250hp (Corvette Racing Editions) Base -283 10.5:1cr (2x4 carbs/ Duntov solid) 270hp Super Turbo Fire 283 10.5:1cr (Fuel Injection/Duntov solid) 283hp Factory Power Kit: All new 283 small block, costly “Ram-Jet fuel injection /twin four barrel carburetor/ aluminum intake, Duntov solid camshaft, Super Turbo Fire Hyd. Camshaft, and revised Super Turbo Fire cyl Heads in F.I or 2x4 setup.
Here is from an auto files site... http://www.autofiles.org/chevrolet/chevrolet-corvette-283_3577.html
From chevyhiperformance.com 1 HP/CI Early On Although at the upper end of engine options, dual quads had been offered on the 265 with a high-lift cam and 240 hp, the era demanded not only more power, but also broadband performance. So the new-for-'57 283 with its 0.125-inch larger bore (3.875-inch bore, 3.00-inch stroke) was available with the standard two-barrel, four-barrel, dual quads, or a new mechanical fuel-injection system that produced 283 hp from 283 ci (1 hp per cubic inch). All cylinder heads for the 265s and 283s used 1.72/ 1.50-inch valves.
Oops. Well the 097 cam came out in '57 and was used through '62 until a new one was developed for the 327. I would try to find the stock specs (which is difficult because each MFG seems to be a little different) and start there.
Stock 097 specs.... The original "097" Duntov cam (P/N 3736097, casting #3736098) had 228* intake and 230* exhaust duration @.050", .394" intake and .400" exhaust gross lift (with 1.5:1 stock rockers), and 108* lobe separation. Does that help? I guess Federal Mogal has a blueprint duplicate (CS-113R) of the original 097.
Are we sure on the Duntov 097? If so that helps a lot.... I have a 283 on the stand for my model A project and would like to replicate this motor if possible. I am not opting for te FI setup though, too much $$.
Root, you might try over on the Junior Stock thread http://www.jalopyjournal.com/forum/showthread.php?t=201085 Some of those guys ran them and/or were tech inspectors verifying them. Lee
Dont take my word i was asking that question myself for the same purpose Here is the new cam according to jefferyjames http://www.napaonline.com/Search/Detail.aspx?R=SEPCS113R_0183330273
I got those number from a Corvette Forum that was requesting a similar question. I would put some more research into it but I think it's a start for a base of comparison. And yes, the FI is silly expensive so I would opt out also.
A guy I was looking into on ePay is selling a cam that is what they state as an exact same grind as the original 097 but with a new CMC core. It states to be used on restoration of '57-'63 HI PO and FI solid lifter engines. here are his specs... Specs are 230'@.050, 287' advertised, .393 in X .399 ex lift, 112' separation, lash is .012 & .018.
I still have my 097. It came out of a new FI vette in 1960. The new owner did not like the idle so the dealership changed it out. I ran it for years.
I have an old Engle 95 solid lift cam I have held on to for years. Not sure why but I just can't part with it.
From Corvette Action board: The original "097" Duntov cam (P/N 3736097, casting #3736098) had 228* intake and 230* exhaust duration @.050", .394" intake and .400" exhaust gross lift (with 1.5:1 stock rockers), and 108* lobe separation. The Speed-Pro/Federal-Mogul/ Sealed Power #CS-113R is a blueprint duplicate of the original. It uses ordinary stock valve springs - GM #3911068 or Federal-Mogul #VS-677; 80# closed, 200# open at 1.25".
what they all said--097 cam, 10.5 pistons -cam is available from Elgin and Speedpro I think with correct specs--just finishing a 283 HP car-haven't fired it yet-I think 539 heads for the fuely and 997 heads for the dual quad cars-cam was used from 57 thru 63--the final version with this cam was the 360 HP 327--cam is manageable with a std trans-about 750-800 idle in a 283
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