[DeTomaso] Collector, Pipe, and Muffler Choices

Rob Dumoulin rob at dumoulins.net
Mon Apr 25 19:53:59 EDT 2011


You know what they say...."Size really does matter"  :)

On Mon, Apr 25, 2011 at 7:14 PM, Ken Green <kenn_green at yahoo.com> wrote:

> 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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-- 
Rob DuMoulin
904.476.8744
rob at dumoulins.net



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