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Old 10-04-2007, 03:46 PM   #1
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Default Headers w/ stock valvetrain or cam

Thinking ahead. Would there be any benefit to get headers with a stock cam and valvetrain?

The plan is to cam the car, but was wondering if headers before the cam would make any sense.
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Old 10-04-2007, 04:37 PM   #2
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I have headers and only have rockers and i felt a difference if you are looking cam i would do it after headers
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Old 10-04-2007, 05:41 PM   #3
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Sure, you could potentially drop pulley sizes.
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Old 10-04-2007, 05:53 PM   #4
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Quote:
Originally Posted by gojo83
I have headers and only have rockers and i felt a difference if you are looking cam i would do it after headers
PEMs aren't headers but are better then the stock manifolds.

If you plan to cam the car do the headers first; I noticed a large gain with the butt dyno when I did the same thing.

Ed
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Old 10-04-2007, 06:37 PM   #5
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You will lose a little grunt on the low end but the horsepower up top will increase. They should allow you to run a slightly smaller pulley as well to pick up some of that low end torque.
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Old 10-04-2007, 06:45 PM   #6
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I have headers ready to go in once I get them fixed up.

My goal right now is to be able to run a 3.0/3.1 with pump gas and 17*-18* of timing. I'm already doing it with a 3.3 and stock manifolds.

Several GPs are in the mid 13s with just headers, pulley, intake and tune.
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Old 10-04-2007, 07:13 PM   #7
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Quote:
Originally Posted by McGrath
Quote:
Originally Posted by gojo83
I have headers and only have rockers and i felt a difference if you are looking cam i would do it after headers
PEMs aren't headers but are better then the stock manifolds.

If you plan to cam the car do the headers first; I noticed a large gain with the butt dyno when I did the same thing.

Ed
sorry my sig isn't up to date I guess I am not talented enough tto know WTF I am talking about on my car. pacesetters are a pain to install but the pull up top is better then pems
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Old 10-04-2007, 09:44 PM   #8
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I did...it did lose a little low end..but nothing crazy
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Old 10-04-2007, 09:49 PM   #9
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Quote:
Originally Posted by BillBoost37
I did...it did lose a little low end..but nothing crazy
yes this is true, but the advantage is that you can run a smaller pulley size to make up that lost low end.....

the Top end gain is worth the loss in the low
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Old 10-04-2007, 09:56 PM   #10
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Currently I have a 3.5 and FWI and was thinking of PCM and headers at the same time. Then next summer go with a cam and tranny work.

Just confirming...this is a better method than doing headers after my summer plans?
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