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02-08-2021, 08:57 AM | #1 |
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Typical header dimensions
What’s the typical header sizes used on an A stock bbc?
I run a 402 in my bracket ride and am using a hooker comp header with 2” tubes & a 3”1/2 collector. Turns low 10’s at 130 plus |
02-09-2021, 03:56 AM | #3 |
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Re: Typical header dimensions
Sometimes 2 1/8 on our Max Wedges -I would think
maybe a bit bigger than 2" on Big Block GM. However, I have not raced a big block Chev. since early 70's so what the Heck would I know. Maybe a Step starting @ 2" and going up?
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John Irving 741 Stock 741 Super Stock |
02-09-2021, 01:05 PM | #4 |
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Re: Typical header dimensions
I’d been wondering if the collector is too big @ 3”1/2
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02-09-2021, 03:31 PM | #5 |
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Re: Typical header dimensions
I would say no....
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02-09-2021, 11:08 PM | #6 |
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Re: Typical header dimensions
I agree with Billy.
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John Irving 741 Stock 741 Super Stock |
02-09-2021, 11:21 PM | #7 | |
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Re: Typical header dimensions
Quote:
(Measured with a tape.) So there's that... |
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02-10-2021, 07:32 AM | #8 |
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Re: Typical header dimensions
I’m hunting around to drop up a tenth or 2 that’s all.
Maybe grasping at straws during the winter boredom.... |
02-10-2021, 12:24 PM | #9 |
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Re: Typical header dimensions
My SS 402 likes 1 7/8" step to 3.25 throat merge collector for what it is worth.
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02-10-2021, 12:33 PM | #10 |
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Re: Typical header dimensions
And I'm guessing that it's an oval-port combo?
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