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04-12-2023, 07:58 PM
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#21 |
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BANNED
Join Date: May 2010
Location: Wa.
Posts: 5,423
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Re: 59AB - Headers vs stock exhaust manifolds?
Several people (John Lawson included) have done comparison dyno tests between stock exhaust manifolds and headers.
It takes at least 3 hp to feel a difference in performance in the seat of the pants. This never happened. They did NOT however compare header types. We DO know for a fact that "W" type make more hp on a race engine if they are big enough. |
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04-12-2023, 11:45 PM
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#22 |
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Senior Member
Join Date: Dec 2015
Location: Marana, AZ.
Posts: 482
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Re: 59AB - Headers vs stock exhaust manifolds?
What are "W Type" headers? I googled it and got nothing. I can imagine a W configuration but do you have any pics?
Just curious as my only Flathead is in my F3 and stock. |
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04-13-2023, 02:39 PM
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#23 | |
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BANNED
Join Date: May 2010
Location: Wa.
Posts: 5,423
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Re: 59AB - Headers vs stock exhaust manifolds?
Quote:
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04-13-2023, 02:52 PM
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#24 | ||
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Senior Member
Join Date: May 2015
Posts: 11,644
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Re: 59AB - Headers vs stock exhaust manifolds?
Quote:
Quote:
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04-13-2023, 11:28 PM
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#25 |
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Senior Member
Join Date: Dec 2015
Location: Marana, AZ.
Posts: 482
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Re: 59AB - Headers vs stock exhaust manifolds?
THAT is one BADDASS looking Flathead.
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