[DeTomaso] modified port plates for 180's

[Will Kooiman]

You mean like a Windsor?

That's one of the advantages of a Windsor over a Cleveland - assuming you're
using 180 degree headers.  If you're using traditional headers, you've got
to go down sooner or later, right?  What does it matter if the heads bend
the exhaust gasses or if the headers do it?

If you're using 180-deg headers, you're bending the gasses down by the
heads, and then back up with the headers.  I imagine there's some HP to be
gained by cutting off the exhaust ports and aiming them more skyward.

I don't think this is nearly as important as the intake, though.  The
exhaust is under pressure.  It can handle a few kinks here and there.  Think
about the mufflers.  Yes, they cost some HP, but imagine what would happen
if the intake had to breath through 2 mufflers.  Also - you'd have to worry
about fuel pooling/separation.

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of mark skwarek
Sent: Sunday, January 04, 2009 10:22 PM
To: detomaso at realbig.com
Cc: Ken Green; jderyke at aol.com
Subject: [DeTomaso] modified port plates for 180's

I am interested if comments regarding the use of port plates to modify the
exhaust port so that it does not make a 90 degree turn  exiting the head
perpendicular to the cylinder bore, but rather making a shallower turn which
results in the port comming out the top of the head adjacent to the valve
cover.  The head would be wider than stock but not as wide as when you add
the width of the frist header bend. We try to make the intake as straight as
possible but I haven't seen anything about making the exhaust as straight as
possible.
 
Is there anything to be gained?  If so what and how much?
 
 This should work well with 180 degree headers. 
Mark
 
 


      
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