There's a big difference in a dual exhaust V8 and a 6 cylinder with headers
or split manifold. My '51 GMC with Nicson headers on a 302 inline 6 is
capable of awesome sound. I have changed exhaust setups several times in
search of the "purr-fect" sound. First I had turbos exiting in front of each
wheel. Way too loud, very tiresome on long trips, so I ran the exhaust out
the back, under the bumper. Still too loud. Changed to two long (48") glass
packs mounted as far forward as possible - this produced a nice 6 cylinder
purr, progressively louder with RPM. Then I decided to mount a brake booster
under the driver side floor, so had to re-route the exhaust. I crossed both
pipes over to the passenger side, still using the same long glass packs,
about 2" apart, with both tailpipes exiting behind the passenger side rear
wheel. This totally changed the sound - made it like an Austin-Healey on
steroids! The glass packs have aged nicely, resulting in a deep, pleasant
tone until over 3000 RPM when it turns into a howl. The more RPM the louder
and better it sounds! I attribute this to the resonance from the long
tailpipes, and other Inliners have confirmed this, some even going to
crossed-over tailpipes to gain more length.
The only thing missing from the way I remember the split-6 sound from high
school days, is the "Rap" on overrun or deceleration. It's lost when a cam
with lots of overlap is installed. My totally stock 216 with 2 Smittys was
louder on deceleration than any other time - sounded like engaging a Jake
Brake (and I had tickets to prove it)!
Jack / Winter Park FL
----- Original Message -----
From: Alan Gingles <agingles@nucleus.com>
To: <oletrucks@autox.team.net>
Sent: Tuesday, October 19, 1999 8:14 PM
Subject: Re: [oletrucks] miq's exhaust
> The Swinging Aligator In The Swamp wrote:
> > Miq, I checked out your trucks. Looks pretty good. I had a question
about the
> > exhaust exiting in front of the rear wheels. Did you notice any
increase in
> > sound level using this method vs. straight out the back. I'm toying
with the
> > same configuration on my 53 with 350 small block. I'd like to get the
exhaust
> > laid out while everything is still stripped down the the bare frame.
> >
> > Wally
> >
> > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
> Wally,
>
> My exhaust exits in front of the tires as well. I used some cheap Turbo
> mufflers on it, and the volume isn't that bad. It has a really nice
> sound when you get on the gas. The only noise concern inside the cab is
> when you're accelerating. Once you hit cruising speed the noise levels
> out and isn't really noticeable, even at freeway speeds.
>
> Alan Gingles
> 1948 Chevy 1314
> http://www.nucleus.com/~agingles
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|