<VV> exhaust manifold mod improved flow?

[Ron]

"It seems that the exhaust manifold is fairly restrictive"

It seems to me that before you go to all that work you should make a more 
definitive appraisal as to the exhaust velocities and loss factors on both 
the stock system and your proposed system.  You may not want to lose so much 
velocity head before the turbo, but that's just a guess on my part.
RonH


----- Original Message ----- 
From: "chad c" <roadrashgixer at msn.com>
To: <virtualvairs at corvair.org>
Sent: Thursday, July 31, 2008 9:40 AM
Subject: <VV> exhaust manifold mod improved flow?


>
> It seems that the exhaust manifold is fairly restrictive.  I have thought 
> of cutting the end off (where the exhaust exits).  Then cutting the log 
> open long ways, horizontally.  Then having a good welder weld in another 
> 1/2 inch or so of material.  Basically, increasing the internal volume. 
> Weld the end back on, then open up the exit port to increase flow there.
>
> Probably a crazy idea, I know.  But I figured I'd ask if anyone has done 
> something similar.  And has it helped flow and performance?  What kind of 
> flaws does anyone see in this idea?
>
> I know what you're probably thinking.  "Just put headers on it".  I can't 
> really go with headers, as I'm building a turbo engine.  I'm going with 
> turbo heads which I am porting.  I've had them machined for 140 manifolds. 
> I'd like to improve the flow of the 140 manifold if possible.  I don't 
> want to have to custom build header style manifolds for the turbo system.
>
> Chad in Denver
> 1969 Monza Convertible
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