how will these manifolds flow?
03-23-2005 | 08:07 PM
#13
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Joined: Jan 2002
Posts: 2,053
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From: Further South East of Dome Island
Re: how will these manifolds flow?
Classic log manifolds are low performance. There is a great article in Hot Boat this month on just this topic. They dyno compared log manifolds to headers, about a 50hp difference which is HUGE. This was on a 450ish hp engine so 10% change, 70hp with an arrestor change as well.
03-23-2005 | 08:57 PM
#14
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From: Gainesville, Fl
Re: how will these manifolds flow?
Only problem is can i use headers safely? The manifolds that came on the boat and the ones in the picture above have water cooled exhaust. How do I know if i can use headers? Are there any water cooled headers?
I'm new to the boating game so if the answers to these questions seem obvious, I appologize.
I'm new to the boating game so if the answers to these questions seem obvious, I appologize.
Last edited by davids94; 03-23-2005 at 09:01 PM.
03-23-2005 | 09:29 PM
#15
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Joined: Oct 2000
Posts: 2,377
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From: CHICAGO, IL
Re: how will these manifolds flow?
Definetly looks like Stainless Marine from years ago. A friend of mine has a 27 Magnum with 351 Fords and he has the same ones. Infact they are still running today. Fresh water boating.
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If you like it rough do it OFFSHORE!!!
If you like it rough do it OFFSHORE!!!
03-24-2005 | 08:02 AM
#16
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From: Gainesville, Fl
Re: how will these manifolds flow?
so i figured out the answers to my own questions above, my last issue is $$$
am i going to find a decent set of headers (new or used) for under $1000?
am i going to find a decent set of headers (new or used) for under $1000?
