Dual Exhaust

Post information about exhaust systems. Either purchased or custom made
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HateMyAuto
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Dual Exhaust

Postby HateMyAuto » Wed Mar 15, 2006 7:34 pm

While I was working today my mind was wondering, and I got to thinking about exhausts(how bored was I?). Anyways, I've seen true dual exhausts (without a Y pipe) with H pipes that connected the two pipes to equalize the pressure between them and then I've seen ones without the H pipe. Why would one setup be used over the other?


'96 Z26 Now with 10% more displacement
'94 Camaro

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Mr Goodwrench
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Dual Exhaust

Postby Mr Goodwrench » Wed Mar 15, 2006 8:32 pm

h-pipes are best!!
equalizes pressures in both pipes an also when the work together in a h or y setup they help pull the exhaust from the motor in pulses.  a exhaust pulse is when the exhaust valve opens an the piston pushes it out. when they are equalized in a h or y setup they help push an pull the next one along. when both banks are hook up together in this setup h or y what happens is bank 1 cyl 1 just fired and bank 2 cyl 6 is pushing out exhaust the next stroke bank 1 cyl 1 is pushing out exhaust  an bank 2 cyl 6 is closed an  it pulse is helping banks 1 cyl 1 exhaust out..
so in a h or y you have all 6 cyl pushing an pulling.
in a non h or y you would only have 3 working..

sorry very conplicated

Mr Goodwrench



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rweatherford
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Dual Exhaust

Postby rweatherford » Wed Mar 15, 2006 8:43 pm

H pipe or X pipe usually increases HP and TQ over a completely divorced dual system.  I've been wanting to add an x-pipe to the wagon.

Sounds different too.


Rex Weatherford
92 Beretta GTZ Quad4 Turbo / 5-speed (sold)
Best 1/4 ET =  13.523 @ 105.16 mph

07 Mazda 5 Black on Black (it's slow)


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HateMyAuto
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Dual Exhaust

Postby HateMyAuto » Wed Mar 15, 2006 11:03 pm

Thanks for the explanation, Mr Goodwrech, I think I understand what you are saying.

Again out of sheer curiousity, does anyone here with dual exhausts have a true setup, or does everyone just have a Y after the rear axle?


'96 Z26 Now with 10% more displacement
'94 Camaro

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1988GTU
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Dual Exhaust

Postby 1988GTU » Wed Mar 15, 2006 11:29 pm

It works best on RWD automobiles.


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rweatherford
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Dual Exhaust

Postby rweatherford » Thu Mar 16, 2006 8:21 am

I've never seen a true dual system on a Beretta.  It's possible, but definately not worth it.


Rex Weatherford
92 Beretta GTZ Quad4 Turbo / 5-speed (sold)
Best 1/4 ET =  13.523 @ 105.16 mph

07 Mazda 5 Black on Black (it's slow)


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HateMyAuto
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Dual Exhaust

Postby HateMyAuto » Thu Mar 16, 2006 9:27 am

Why not worth it, neglible gains?


'96 Z26 Now with 10% more displacement
'94 Camaro

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Asylum
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Dual Exhaust

Postby Asylum » Thu Mar 16, 2006 10:24 am

(HateMyAuto @ Mar. 16 2006,10:27)
Q
U
O
T
E
Why not worth it, neglible gains?

Basically.
Our engines are not big enough to require anything larger than 2 1/2" unless you have major mods.


Eric

Asylum Motorsports
"Where we're not happy 'til YOU'RE not happy!






'91 California Quad
'92 3500 GT gone and not really missed. It was fun. Documented 13.47 N/A.

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Mr Goodwrench
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Dual Exhaust

Postby Mr Goodwrench » Thu Mar 16, 2006 9:49 pm

My 98 TA  an so does my 93 chevy truck have h-pipes!! i think the 98s more like a x though.. both have headders with 3" collectors gowing down to 3"oval pipe on the TA an  2 1/2" pipes on the truck. the TA runs high flow cats the truck none.  both running flowmaster 30 or 40 single chamber mufflers..  both have verry deep rumble an deep tone.  with the truck sounding more like a camaro with really loud pipes...

For the beretta you could find a larger down pipe then split it for a good duel setup..
but gowing duel from the manifolds would be a big pain in the a$$.  only if you found someone with a mandral pipe bender it might work.  cause bending it in a normal bender it would just kink up an not work well..

Mr Goodwrench



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rweatherford
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Dual Exhaust

Postby rweatherford » Fri Mar 17, 2006 7:34 am

The only way to do a true dual on these cars would be with a pipe off each manifold on the v-6 (or header if you buy or build them) or a LO Quad4 tubular manifold without the lower 2-1 section.

The V-6 would be very difficult to do correctly because the cross pipe location is supposed to be equal distance for each bank of cylinders.

The Quad would be easiest, but why.... :hammer


Rex Weatherford
92 Beretta GTZ Quad4 Turbo / 5-speed (sold)
Best 1/4 ET =  13.523 @ 105.16 mph

07 Mazda 5 Black on Black (it's slow)



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