[DeTomaso] modified port plates for 180's
Charles Engles
cengles at cox.net
Mon Jan 5 20:30:33 EST 2009
Dear Ken,
Ach du Lieber! Although Mark said "port plates" and I thought he meant the famous "port plates" of bolt on fame for street engines, he was actually referring to the more serious "raised exhaust ports" with a port plate. I very different thing and a much bigger undertaking. I think that the "port stuffer" phrase refers to the aluminum intake port stuffers used mostly on Funnelweb and Rousch intakes---I think. It is rather confusing.
Often confused, but never in doubt, Chuck Engles
----- Original Message -----
From: Ken Green
To: Charles Engles
Sent: Monday, January 05, 2009 7:12 PM
Subject: Re: [DeTomaso] modified port plates for 180's
Chuck,
I think you are thinking of port stuffers. Mark was talking about machining away part of the head and attaching a metal bar with different shaped exhaust ports. I think that's what the Pro Stock guys did when the Cleveland first came out.
Ken
--- On Mon, 1/5/09, Charles Engles <cengles at cox.net> wrote:
From: Charles Engles <cengles at cox.net>
Subject: Re: [DeTomaso] modified port plates for 180's
To: ehpantera at yahoo.com
Cc: detomaso at realbig.com
Date: Monday, January 5, 2009, 4:55 PM
Dear Mark,
Comments: port plates are "supposed" to work by
"filling in"
the dead area in the lower part of the exhaust port
Supposedly there are some flow tests that
show improvement
Observations: exhaust flow is way different that intake port
flow velocity and exhaust flow is rather, well, explosive and high velocity.
I can't recall any actual dyno tests
on the benefits of intake and/or exhaust port plates in a 351C
Real news: Dan Jones happens to have a set of the bronze
exhaust Port Stingers and expects to test them in the famous Grand Cleveland
351C Dyno Extravaganza. If you can wait, then you should have some real
world data. If you would like to contribute to Dan's great work, then
email Dan to be directed to the PayPal account for donations.
Warmest regards, Chuck Engles
----- Original Message -----
From: "mark skwarek" <ehpantera at yahoo.com>
To: <detomaso at realbig.com>
Cc: "Ken Green" <kenn_green at yahoo.com>; <jderyke at aol.com>
Sent: Sunday, January 04, 2009 10:21 PM
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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