Re: 71 malibu GM 502/502 Gen VI -- Lemons Header Message Board

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Subject: Re: 71 malibu GM 502/502 Gen VI

Author:
Dan Lemons

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Date Posted: 07:31:56 01/04/02 Fri
In reply to: J.C. Repard 's message, "71 malibu GM 502/502 Gen VI" on 06:30:45 12/29/01 Sat

>Reading your tips on this installation, what do you do
>with the power brake booster ? I have Hooker super
>(no-fit) Comps on now, 2"-31/2", and was thinking
>about another set, to pickup top end-???This is a
>street-strip 10.7/123mph car now, with under 10.0-1
>comp.the heads are the GM alum oval 502/502 ,1.90-2.25
>units. Edelbrock makes these for GM. What is your
>suggestion on size? the current cam is 229/237 @ .050
>and 564/587 lift, but I'm thinking about one notch up
>in duration and lift,237/242--587/612 lift. Also
>ground clearance since this a limited street car, is a
>concern. Please advise.

Hi JC, thanks for the e-mail. This header was designed on a car with power brakes and will fit fine, although the brake lines will have to be rerouted. Ground clearance with this header is very good. A 2 1/8" tube with a 4" collector would work very good for both sreet and strip, or possibly a step header 2 1/8" to 2 1/4" with 4" collector. But as you get larger with tube size you will start to lose torque, but gain HP at higher rpm's,so we would have to look at weight of car, expected HP, trans type and stall setting, tire size, nitrous or not, etc. etc. Thanks again, Dan Lemons.

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