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Old 09-09-2007, 11:33 PM
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Need help choosing a cam!

Hi guys i need a lil help choosing a cam. my set up is a sbc 406,srp flat tops 11.6 wit 64cc AFR 220cc fully cncd. A brodix hv intake port matched 2 the heads, 850 AED,400 tranny,4.10 gears. My car weighs about 4500 lbs its a 1971 chevy caprice on 24" rims and tires. im not lookn 2 race but im tryn 2 move this heavy car as fast as i can when its time to race another car in my weight class. any suggestions on a good solid roller spec? i need 2 no what duration @ 50 is best, rpm band and a nice lobe sep.

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Old 09-09-2007, 11:39 PM
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if you are set on using a solid camshaft use a flat tappet, the valve spring pressures and oiling issues will kill a solid roller camshaft just cruising around town in no time, you might get away with it for a while if you grooved the lifter bores, comp cams sells tools to do this with, save yourself the trouble and use a flat tappet, just check your valve lash every oil change and you should be fine
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Old 09-10-2007, 06:28 AM
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call AFR and ask....because.....those 220 ports are designed more for high rpm performance....you need all the low rpm TQ (mix velocity) to accelerate the 4500 lbs you can get....

then call/email 4 cam companies and see if they concur with AFR's recommendation....

the 4.10 gears (and 420ft/lbs? from the motor) are going to help alot with (TQ) acceleration and no ping

just a comment:
you built a mid range to high rpm motor....you need a max power at low rpms cam for the 4500lbs weight....
strip even 500lbs out of the car and it will preform so much better!
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