Exhaust Manifolds
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=1023
Printed Date: December-04-2024 at 4:38am
Topic: Exhaust Manifolds
Posted By: 64 Skier
Subject: Exhaust Manifolds
Date Posted: November-30-2004 at 8:05am
My engine has been fully re-built with lots of extras such as 4 BBL Carb, Edelbrock Performer Intake, larger valves in the heads, 30 thousandths over on the pistons etc.
The BARR marine exhausts were reconditioned and being used, but I've read on this Board where the "old style" put a lot of restriction on the performance.
Can they be Ported with any success?
What's a better performance exhaust manifold?
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64 Skier
66" HO VTX and 67" HO Triumph
http://www.correctcraftfan.com/diaries/details.asp?ID=1071&sort=&pagenum=3&yrstart=1971&yrend=1975 - 71CC
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Replies:
Posted By: john33617
Date Posted: December-01-2004 at 6:23pm
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http://www.barrmarine.net/ford_smallblock/ford_small_block.htm
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Posted By: reidp
Date Posted: December-02-2004 at 6:03pm
64'
Not knowing what which Barr exhausts you have and whether they're the older smaller +/- 2-1/4" or the 2-7/8 to 3" hose size, it may not make a lot of difference for you to move to something less restrictive. On a significantly modified engine, I gained about 100 rpm going from small to large exhaust hose dia., and about the same gain again when swapping to the larger exhaust manifolds. I'm using the ones that John provided the thread on above (but not on the boat shown below). You can port your existing manifolds at the ports to make sure they're at least as large as your head exh ports. In my opinion it really depends on how bad/small your current ones are and your degree of modifications to the engine.
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ReidP
/diaries/details.asp?ID=231&yrstart=1971&yrend=1975 - 1973 Mustang
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Posted By: 64 Skier
Date Posted: December-08-2004 at 6:12am
Thanks guy's....think I'll get the high speed tools out and start porting.
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64 Skier
66" HO VTX and 67" HO Triumph
http://www.correctcraftfan.com/diaries/details.asp?ID=1071&sort=&pagenum=3&yrstart=1971&yrend=1975 - 71CC
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