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Old 08-21-2010, 04:38 AM
mtg mtg is offline
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need help wit selecting the correct cam

I have a SBC chevy400 with 327 double hump head with 202 valve
My tranny is a build turbo350 with shift kit 2800 to 3200 stall
I have a 4.56 gear, can someone please recommend me a compatible mechanical flat tappet cam.That will allow me great take off and top end speed.

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Old 08-21-2010, 07:56 AM
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what compression?
what tire diameter?
what car weight?

from the information given, I would say a cam similar to a compcam 294S would do ok. But the heads will require the correct springs for that cam (1.5" diameter preferred) and would require screw in studs and guide plates.

Furthermore, a cam like this requires a compression ratio between 10 and 11:1 cr, a Performer RPM dual plane intake or a single plane intake, headers, and dual 2-1/2 pipes.

the gear seems a little high if you plan to use regular size car tires. 4.11 gear would be better with tires 26 to 28 inch tall.
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Old 08-21-2010, 10:52 AM
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Depending on the exact measurements involved, your CR is going to be in the 11:1 range, give or take. This is too high for pump gas.
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Old 08-21-2010, 01:03 PM
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Tire 26*10.5-15 the compression is 11 to1 the weight I don't know it in a 83 old cutlass 442
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Old 08-21-2010, 01:15 PM
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Just what is it you have in mind for it? Daily driver, W/E cruiser, race only, or?
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Old 08-21-2010, 01:29 PM
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I'm building the car for racing only
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Old 08-21-2010, 01:44 PM
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I would use a solid cam- preferably a roller if the budget allows.

The Comp solid 454C10 mentioned would be one cam to take a look at. I personally don't often select cams for others, but I have no reason to think it wouldn't work for what you want to do.

Your heads will be the bottleneck- they need serious porting to make decent power. Your torque converter needs to be quite a bit looser, too.

Good luck.
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Old 08-21-2010, 01:45 PM
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Ok, racing; but we need a lot more info.

Header primary pipe size, and length; collector size; intake type/style/brand/name; carb size and brand; rpm you are willing to turn (redline), approximate ET you want to run, car gutted racer or full street weight??
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Old 08-21-2010, 02:02 PM
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Yes header weiand team g intake wit open flange 4" tall the carburetors Holley 750 double pumper
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