[DeTomaso] Collector, Pipe, and Muffler Choices

[Ken Green]

Dan,
 
    Based on this, are we better off with a 2 1/2 collector and pipe into a 3 inch muffer, than three inches all the way?
 
Ken

--- On Mon, 4/25/11, Daniel C Jones <daniel.c.jones2 at gmail.com> wrote:


From: Daniel C Jones <daniel.c.jones2 at gmail.com>
Subject: Re: [DeTomaso] Muffler Choices
To: "Pantera REALBIG forum" <detomaso at realbig.com>
Date: Monday, April 25, 2011, 2:28 PM


> What I'm trying to understand is if a 2 1/2 inch pipe out of a good merge
> collector is enough for 425 HP or around there.  I think it is, but I'm not
> sure.  It should le a lot better than a 2 inch pipe.

For the short length of the intermediate pipes, 2 1/2" diameter is plenty.
It's the muffler core that represents the restriction.  Ideally, you want
it to appear to the collector as a larger effective diameter than the
intermediate pipe.  With the 2 1/2" intermediate pipe, step up to a 3"
straight through core muffler like a Magnaflow.  The OBX mufflers I examined
at PIM appeared to have a smaller internal diameter, the opposite of what
you want.

Dan Jones
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