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#1
07-03-2005, 10:14 PM
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got a 65 gto with a 68 motor im building.its got a 4 speed trans.i want a loppy cam what do you suggest.i have a crane powermax from a prior rebuild.grind #h-272-2 replaces hmv-272-2.part#283941 remember something loppyi drive like a grand ma
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64 Gto 65 Gto 68 Gto 64 Corvette 67 SS 396 camaro 76 BMW 2002 05 Silverado 3500 09 G8 GT |
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#2
07-03-2005, 10:15 PM
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What's your displacement and your approx compression?
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#3
07-03-2005, 10:32 PM
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400 30 over.16 heads just redone by a machine shop.standard crank.compresion prob.10-1.
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64 Gto 65 Gto 68 Gto 64 Corvette 67 SS 396 camaro 76 BMW 2002 05 Silverado 3500 09 G8 GT |
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#4
07-04-2005, 04:43 AM
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Crower makes a 228/235/112 cam, pretty sure the number is 60243. We've used a few of them in early 400's with manual transmissions. Pretty aggressive cam, at best 12" of vacuum at 1000rpm's, noticable lope at idle. On KRE's dyno they made 424hp/465tq with a 406 engine using unported 72cc heads, iron intake and q-jet.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#5
07-04-2005, 11:03 AM
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thanx cliff by the way the carb for my 68 gto runs like it never has.it will fry the tires off .couldnt be more impressed with your work.back to the cam,the one i allready have is a crane.it says 272/284 adv. duration.cam timing,216/228 duration.lift,454/480.will this be a close match to your suggestions?
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64 Gto 65 Gto 68 Gto 64 Corvette 67 SS 396 camaro 76 BMW 2002 05 Silverado 3500 09 G8 GT |
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#6
07-04-2005, 11:10 AM
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Great, glad you like it!
The 216/228 cam will act much like a stock cam in the 10 to 1 CR 400 engine. Probably idle smooth with a "deep/heavy" sound. The 228/235 cam would be a much better choice as it will bleed off some cylinder pressure at low speeds and pull very strong in the upper mid-range and top end. You'll need at least 3.55 gears (3.73's would be better) to effectively use it.....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#7
07-04-2005, 11:17 AM
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Are you planning on running racing fuel in your iron headed 10:1 cr motor to avoid detonation?
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John  "There are no stupid questions, but there are a LOT of inquisitive idiots!" |
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#8
07-04-2005, 11:22 AM
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Cliff, What would be the effect of running the above combo (400 ci 228/235 cam with 3.23 gears and 4 speed)? I only ask because I am in the process of building a similar motor (eheads) for my 76 T/A and have a 3.23 8.5 10 bolt rear.
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John "There are no stupid questions, but there are a LOT of inquisitive idiots!" |
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