[DeTomaso] Collective wisdom sought - exhaust options.

[Mike Drew]

Chuck,

FWIW what I did with my factory ANSA pipes was to cut back the pipes a bit further, and fabricate a Y-shaped pipe of similar diameter made of similar perforated tubing, then I packed the muffler thoroughly with stainless steel muffler packing material (which I got from Howe Racing I believe) and welded the tops of the mufflers back on. 

(You are supposed to do this surgery from above because it will leave scars, which are invisible when the mufflers are mounted in the car). 

It worked great, but horsepower improvements were nit as great as I would have hoped (only 12 hp) because the true restriction comes from the small diameter of the resonator tips. Newer production ANSA mufflers have no resonators in the tips for better flow (and Wilkinson mufflers use resonators whose OD is unnoticeable greater than stock but ID is MUCH greater than stock, for much better flow).

Mike

Sent from my iPad

> On Jun 1, 2020, at 07:09, Charles Engles <cengles at cox.net> wrote:
> 
> Dear Mike, Mike and Joe,
> 
>             I am in the middle of the muffler modification project as described by Gerry  Romack.  Here is the link for his method;
> 
>                       http://www.greatlakespantera.com/Pantera%20Muffler%20Modification%20edited.pdf
> 
> 
>            I am attaching a few photos of my unfinished project.   
> 
>                                      Warmest regards, Chuck Engles
> 
> 
> 
> 
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Mike Drew via DeTomaso
> Sent: Sunday, May 31, 2020 8:34 PM
> To: Rob DuMoulin
> Cc: P - Mail List
> Subject: Re: [DeTomaso] Collective wisdom sought - exhaust options.
> 
> Rob,
> 
> That’s a super-easy one. Wilkinson GTS copy.  Made of stainless steel, it made 31hp more than factory ANSA GTS in a Dan Jones Dyno test. 
> 
> Lori has them on her car, and they are fantastic. They still have the GTS drone because the mufflers are made in the stock fashion, so I am about to cut hers apart and rebuild them inside to get rid of it.
> 
> Still, there is no finer system available for our cars IMHO. 
> 
> Mike
> 
> Sent from my iPad
> 
>> On May 31, 2020, at 16:33, Rob DuMoulin <rob at dumoulins.net> wrote:
>> 
>>    1488 is about to get an aluminum block 408 transplant. Trouble is, it
>>  currently has Hall Pantera Big Bore headers and the stock mufflers. The
>>  new engine will be pushing almost 600 horses and I know the stock
>>  exhaust will most likely erupt. What currently available options exist
>>  that maintain a stock appearance?
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