rob, put the car on a chassis dyno. work with the pipe to get the most power,
thenposition the pipe so it points away from the sound meter. at lime rock, for
example, they probably have the sound meter on the outside of the track due to
the houses surrounding the track. aim the pipe toward the inside. ted
Rob Dardano wrote:
> What range of sound readings are you guys getting with 2.5 dia pipe and no
> muffler? . I was concerned with high readings and curently have a 2.5 pipe
> and muffler installed in the stock location but my sound is way down 83.
> MY car is a 6. Is any one running a short pipe exiting forward of the rear
> wheel. those sound #'s would be help full Also the can Kas has mentioned
> will it help lower the sound ? thanks rob
> ----- Original Message -----
> From: <Catpusher@aol.com>
> To: <fot@autox.team.net>
> Sent: Friday, December 14, 2001 12:57 AM
> Subject: Exhaust System Size TR3/4
>
> > Your dyno (flywheel) results may vary,
> >
> > but I run 2.5" diameter, 54" from the collector, through the frame X.
> > after extensive testing.
> > There is no ground clearance to go under the frame on my TR3,
> > and it would not be good aerodynamically.
> > When I started, and R W Kastner's fine books were printed; tire diameter
> > left lots of room for us to run the exhaust down under, and I did.
> >
> > Run as little flex as you possibly can, but a short piece on the header is
> a
> > good idea, if you use stainless.
> >
> > I needed an aluminum sheet to keep the exhaust heat away from the rear
> axle
> > to make life easier on the oil seals, and to comply with the rule that the
> > exhaust must be directed away from the bodywork.
> >
> > Remember that carbon monoxide is nasty, and will attack in an open car.
> >
> > HP
--
Ted Schumacher
TS Imported Automotive
404 Basinger Rd.
Pandora, Ohio, USA 45877
Ph. 800/543-6648 USA/Canada FAX 419/384-3272 24 hour
Ph. 419/384-3022 - tech./general information
Web page http://www.tsimportedautomotive.com
New-Used-Rebuilt-NOS-Performance British car parts.
200 - 300 parts cars in our British-only salvage yard.
|