Date: Wed, 12 Dec 2001 15:18:31 -0800
Reply-To: developtrust <developtrust@HOME.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: developtrust <developtrust@HOME.COM>
Subject: Re: Mechanic says $250 muffler
Content-Type: text/plain; charset="iso-8859-1"
I hope this information helps you. I think you can do way better than $250
for a muffler AND do some good upgrades to boot.
I have been looking into mufflers as well. And considering the turbo
performance muffler for about $69 from
http://www.a-1performance.com/super_turbo/
or local dealers you can find on their web page.
The turbo performance muffler to get is the Nissan truck muffler Part Number
17783. This muffler is supposed to help increase horse power by providing
less back pressure.
(I am not going to replace my muffler because it is new but I am going to
wrap the pipes {and muffler} and have already ordered the wrapping from
http://www.geneberg.com .)
Here is what one list member says regarding wrapping the exhaust pipes and
the muffler issue:
"Wrap the exhaust pipes with heat wrapping: Gene Berg has this. It keeps
the heat in the exhaust and reduces heat radiation from the pipes into the
engine compartment.
This keeps the exhaust gases hotter and helps to maintains a high
exhaust gas velocity throughout the pipe.
This allows the exhaust to have better a scavenging effect on the gases.
With the increased duration you can give the intake a better head start
towards the piston by the exhaust gases exiting pulling the intake charge in
sooner.
The air flow meter measures the amount and the ECU knows the amount and
provide the correct amount of fuel based on the engines sensors.
When you wrap the exhaust (I used ceramic coatings) the exhaust gases
stay hotter and therefore travel faster, providing a higher vacuum pressure
(scavenging effect)
as they exit and pulling more fuel into the chamber, providing more
power at ALL rpms, and when you make more power at all rpms you need to use
less pedal to make the same speed.
Another benefit is that all the rubber parts in the engine compartment
will last longer, especially the rubber coolant hoses,
due to the trapped heat the parts face during running. I can take a two
hour cruise and the engine compartment is warm, I can put my hand on the
alternator and it is warm.
Then here is what Steve "not a jeep" says
"the wrapped pipes? yeow..no..don't that only makes them rot quicker (see HP
Books "Turbocharging" Title by Bruce McInnis?)
a turbo muffler..Hmmm..
the actual "turbo muffler" was a unit designed by Chevy for the corvair
spyder (turbo 6 in 150 and later 180 hp ) that was a conventional muffler
which provided low back pressure (turbos don't like back pressure) with a
"legal" noise output across the rpm band...they were quite the deal..for
their
time..I CANNOT believe that most modern mufflers don't come quite close or
EXCEED the flow of the "turbo' unit...so..WHEN your OEM style goes rot-so?
by all means..until then?
The VW is NOT going to notice the difference as much as your wallet is....
my .02"
William Polowniak
1760 Lake Drive
Cardiff, CA 92007-1141
760-753-0321
