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Author Topic: Sohc header primary tube sizing  (Read 2647 times)

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nitro98red

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Sohc header primary tube sizing
« on: July 06, 2013, 11:04:47 AM »
Just getting ready to fabricate a set of headers for my pond heads. Just curious what size of primaries people are running? Motor is for the street.
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jayb

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Re: Sohc header primary tube sizing
« Reply #1 on: July 06, 2013, 11:07:32 AM »
I would go 2 1/8", since you have a lot of cubes.  2" might be OK too, or you could make some stepped headers that went 2" - 2 1/8" - 2 1/4".
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Jay Brown
- 1969 Mach 1, Drag Week 2005 Winner NA/BB, 511" FE (10.60s @ 129); Drag Week 2007 Runner-Up PA/BB, 490" Supercharged FE (9.35 @ 151)
- 1964 Ford Galaxie, Drag Week 2009 Winner Modified NA (9.50s @ 143), 585" SOHC
- 1969 Shelby Clone, Drag Week 2015 Winner Modified NA (Average 8.98 @ 149), 585" SOHC

   

hotrodfeguy

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Re: Sohc header primary tube sizing
« Reply #2 on: July 06, 2013, 01:09:54 PM »
I for one have never considered larger to be a killer of power. I mean we build these things to have fun when we release the hounds @ WOT. And I know I am posting to a SOHC. But in my wedge side I run a 3" dual on a 390 does it kill of a few HP down low YES. Does it hang longer up top YOU BET! And does it ever make that GOD AWEFULL FE SONG !!!!  ;D
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