What is too big on header primary size?

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Aug 22, 2012 | 06:38 PM

ad53030

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From: Austin, Texas

What is too big on header primary size?

LS2, stock heads, strong cam (Comp, Texas Speed maybe), tuned, no other mods. Are 1 7/8" primaries going to kill torque? I could see on a 400+ cu in motor, but is this too much for 364 cu in? Looking at Dynatech for great fitment and price. Like the stepped 1 3/4" to 1 7/8" but it's a huge jump in $$$. Input?

I'm thinking 475 flywheel HP is very doable. I'd like more but don't want to go crazy and risk PTV interference, plus drive ability is very important. 1st Gen F Body w/ T56 and 3.55 gears.

Aug 22, 2012 | 06:40 PM

racerfox

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Quote:

Originally Posted by ad53030

answer no 1 7/8 beats 1 3/4 from a stock motor to a 400cu they are better headers Tsp sells them for 500$ for a pair

Aug 22, 2012 | 07:21 PM

litle88

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1 7/8's would be my choice.

Aug 22, 2012 | 11:19 PM

josh2002-ws6

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I am running 1 7/8's on my 347 and have had no issues. That is my suggestion, go with the 1 7/8's.

Aug 22, 2012 | 11:24 PM

lt1 sport

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ARH 1 7/8's here with just a bolt on car.

Aug 23, 2012 | 02:17 AM

bww3588

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I went in between. I got edelbrock 1 3/4 stepped to 1 7/8. I like them. They have 3.5 inch collectors and are stainless. However, a full 1 7/8 header will not hurt you at all.