[DML] Re: Exhaust Back pressure

["Dani B" <5n-@xxxxxxx>]

I am not running a true dual exhaust as of yet although I have am
currently building one (this is my winter project to complete). In any
case, I'm sorry but I have to disagree with the straight pipe do not
give an increase in power. If you're getting the exhaust gas out of
the engine faster then the better the engine can perform. There is
(although slight) a noticable increase in power-it's not like
strapping in a turbo but there still is some better performance out of
the engine- and it takes much less time to come back to idle from a
high rev then it would with a stock setup. If they didn't do any good
no one would buy them and install them in their vehicles. I believe
that all states will not pass you if you don't have a muffler-and also
will fail you if you're vehicle comes factory with a cat and it is not
installed. In my area I'm well known by most shops and police
departments so I can get away with experimenting with exhausts of my
vehicles. For those who are interested in doing the same thing I did-
DO NOT remove your cat or run with no muffler-you WILL get stopped and
have all kinds
of new troubles from the police, DEP and when inspection time comes. I
am just asking about back pressure for my peice of mind, I'm not
recommending anyone to do the same I have. Also come winter time-I
will be experimenting with the valve train, heads, pistons and all
kinds of good stuff like that-I'll be sure to let you all know how it
goes. Dani B. 5003


> In just about all internal combustion engines there is a "magic"
> amount of backpressure required. It changes as loads change,
> atmospheric pressure, temerature, etc. Straight pipes usually do not
> give an increase in power. If they are too short they can allow
> ambient air to get near the exhaust valves causing them to fail from
> thermal shock. In any case straight pipes are NOISY. In most states
if
> you do not have a muffler or a cat you cannot pass inspection. I
would
> at least replace the muffler. You will not get much improvement by
> modifying the exhaust unless you also modify the intake.
> David Teitelbaum
> vin 10757
> 
> 
> -- In dmcnews@xxxxxxxxxxxxxxx, "Dani B" <5n-@xxxx> wrote:
> > I am wondering if there is any back pressure specifications the
PRV-6
> > requires? I've been running a straight pipe (no cat or muffler)
for
> > quie some time and don't really see that much of a performance
gain.
> > Am I doing damage? Thanks -Dani B. 5003




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