[Shotimes] custom y-pipe?

Tue, 10 Feb 2004 10:10:30 -0600

Ok first this was on my '97.

I had gone to 2.5" straight through mufflers, removed the third cat and 2.5"
tips.  Felt that I lost low end torque.  Fiddled with the plate and if wheel
spin is an indication I did gain some back.

Took the plate out and did not really see any gains in the quarter mile
though.  When I put the original 1.75" tips on the car again I did pick up
low end power but it hurt at the highway speeds.  That is my current
configuration.

When the tips rusted off and I ran without any it did definitely hurt low
end power IMHO.  It was also very loud.

Paul Nimz
'97 TR
'93 EG mtx

----- Original Message ----- 
From: <cmichaelo@optonline.net>
To: "Paul Nimz" <pnimz@v8sho.com>; "shotimes" <shotimes@autox.team.net>
Sent: Tuesday, February 10, 2004 9:55 AM
Subject: Re: [Shotimes] custom y-pipe?

> Paul,
> What was the impact at the high end?
> What hole size did you end up with as a good compromise?
>
> Michael
> 94MTX,green,BOS+,Koni/Intrax
>
> ----- Original Message -----
> From: Paul Nimz <pnimz@v8sho.com>
> Date: Tuesday, February 10, 2004 10:15 am
> Subject: Re: [Shotimes] custom y-pipe?
>
> > It used a smaller diameter center hole, than the total flange
> > area, that had
> > a many smaller holes around the diameter of the central hole.  The
> > smallerholes were varied by quantity.  Pretty easy to change out
> > and yes I was
> > trying to increase low end torque.
> >
> > Paul Nimz
> > '97 TR
> > '93 EG mtx
> >
> >
> > ----- Original Message ----- 
> > From: <Mike.Wojton@us.o-i.com>
> > To: <shotimes@autox.team.net>
> > Sent: Tuesday, February 10, 2004 7:42 AM
> > Subject: Re: [Shotimes] custom y-pipe?
> >
> >
> > > Just different diameter holes?  How did you determine which was
> > best?> Seat of the pants feel?  I presume you're looking for an
> > increase in
> > > torque.
> > >
> > >
> > > Mike Wojton
> > > Toledo, Ohio
> > >
> > > -'95 White MTX
> > >    '96 Brake Upgrade
> > >
> > > "Avoid the clap." - Jimmy Dugan
> > >
> > >
> > >
> > >
> > > shotimes-admin@autox.team.net wrote on 02/10/2004 01:38:07 AM:
> > >
> > > > I agree. backpressure is easy to add.  I use to run a
> > restrictor plate
> > > at
> > > > the Y pipe /Cat back flange.  Got a few laying around if
> > anyone wants
> > > one.
> > > >
> > > > Paul Nimz
> > > > '97 TR
> > > > '93 EG mtx
> > > >
> > > >
> > > > ----- Original Message ----- 
> > > > From: "John J. Weidenbenner" <johnjweid@charter.net>
> > > > To: "Carl Prochilo" <gr8sho@prochilo.myserver.org>;
> > > <Mike.Wojton@us.o-i.com>
> > > > Cc: <shotimes@autox.team.net>
> > > > Sent: Monday, February 09, 2004 4:52 PM
> > > > Subject: Re: [Shotimes] custom y-pipe?
> > > >
> > > >
> > > > > I'm not sure why a single dual inlet cat is being
> > investigated. What's
> > > the
> > > > > advantage. It doesn't match the original layout so it won't
> > the meet
> > > the
> > > > > govt requirements unless the new design is submitted and passes
> > > testing.
> > > > > It's not submitted to the doof that does the emissions test.
> > > > >
> > > > > If low cost and retaining enough back pressure is the
> > objective how
> > > about
> > > > a
> > > > > catless y-pipe with restriction(s)added, such as a necked
> > down pipe
> > > > > element(s). Whatever size it takes. Flow could be caculated
> > and/or> looked
> > > > > up. This could even lead to a customeizable/tuneable y-pipe.
> > The pipe
> > > > still
> > > > > would not have the emmisions "paper work" to make it legal -
> > if you're
> > > > > caught, but would eliminate the cost of the convertor(s).
> > > > >
> > > > > John W.
> > > > >
> > > > > ----- Original Message ----- 
> > > > > From: "Carl Prochilo" <gr8sho@prochilo.myserver.org>
> > > > >
> > > > > > I believe Ian Fisher is investigating this now.
> > > > > > -- 
> > > > > > Cheers,
> > > > > > Carl Prochilo
> > > > > > 1992 Ultra Red Crimson
> > > > > >
> > > > > > Mike.Wojton@us.o-i.com said:
> > > > > > > I was talking to a friend at work here about y-pipes and
> > such> > > > > (he's researching options for his Contour SVT).
> > Anyways, we were
> > > > > > > looking at convertors, and noticed a Catco dual inlet,
> > single> outlet
> > > > > > > convertor.  http://tinyurl.com/38xer  Last one on the page.
> > > > > > >
> > > > > > > Anyone ever thought about using something like this for
> > a custom
> > > > > > > y-pipe?
> > > > > _______________________________________________
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> > > > > Shotimes@autox.team.net
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