which will give best HP gains
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From: crossett, Arkansas
which will give best HP gains will an exhaust cutout or one of the exhaust setups give more gains. to me it would make sense that a cutout would outflow Any catback/ dual exhaust setup. insight would be appreciated.
Originally Posted by 00'WS6Rocket
with cut out you might lose some torque, but gain more hp in higher rpms?????
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On The Tree
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Originally Posted by GXPPOWER
cool. so why do people pay 300+ for exhaust work when a cutout is $20
Otherwise, I would just spend the $30 bucks for the cutout, $30-$40 bucks for the install, and go that route. But because of the tree hugging safety ***** I guess I have to spend more to get a catback.
Thread Starter
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From: crossett, Arkansas
gotta love the south. screw emmisions!!!!!! what i have noticed is. though i have 1 cutout it sonly on the right side. but the left side exhaust to me looks to be the most restrictive. not entriely cylinder and very curvy. but i doubt a cutout would fit on that side because of the odd shape tubing.
Originally Posted by orangeapeel
It will out flow. It is not un-common to see a nice catback setup with a cut-out installed as well.
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From: England
Originally Posted by GXPPOWER
will an exhaust cutout or one of the exhaust setups give more gains. to me it would make sense that a cutout would outflow Any catback/ dual exhaust setup. insight would be appreciated.
David Vizard tells us for optimum efficency we need 2.2cfm of flow for ever 1hp, so a 500bhp engine would need a flow rate of (500 x 2.2) 1100cfm. Many bullet mufflers flow at this level. By adding a cutout you will only by-pass something which doesn't need by-passing. In these cases you will typically see little or no gain at all. If your muffler doesn't flow the sufficent rate then a cutout will help.
However there's more too it than just this, as a cut out will also affect the exhaust pressure wave. This is where power is often gained even on an efficent catback but it's often only in the region of 2rwhp or so. However by adding a cutout to an efficent exhuast you also run the risk of negatively affect the exhaust pressure wave.
The bigger problem you face is although the stock muffler is restrictive so is the 2.5" tubing it uses, a cutout can not get around the tubing size.
As a cheap starter mod, or the need to run a quiet catback a cutout is ok, however if you have a decent catback then the best place for a cutout is on the shelf. - IMO
