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post #1 of 32 (permalink) Old 09-05-04, 10:13 PM Thread Starter
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3 inch vs twin 2 1/2

Which is best? there is obviously a flow diifernce between the two but is there a descent amount of power or torque to be had in one over the other. I am thinking of this for my ute. N/a vs boosted application may be relevant.


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post #2 of 32 (permalink) Old 09-06-04, 01:40 AM
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Re: 3 inch vs twin 2 1/2

Both are good..With single 3" is more critical what type mufflers are used..To keep sound and good flow top quality is needed...

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post #3 of 32 (permalink) Old 09-06-04, 02:10 AM
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Re: 3 inch vs twin 2 1/2

I remember someone saying that a 3" creates more backpressure in the exhaust or something, or a loss of pressure which can restrict the flow....not sure if its a wives tale or true??
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post #4 of 32 (permalink) Old 09-06-04, 02:22 AM
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Re: 3 inch vs twin 2 1/2

get the best of both, run a twin all the way to the diff merge them into a single 3" muffler then out the back as a single 3", works pretty good on mine.

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

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post #5 of 32 (permalink) Old 09-06-04, 03:04 AM
Two SC 61's = trouble
 
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Re: 3 inch vs twin 2 1/2

I doubt 3" is restrictive as I'm runing over 450h.p through one !!!2 X 2 1/2 and twin cats upfront through...
Yep two mufflers up front into single makes sence..That way an X pipe can be used....

Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
Passengers, myocardial infarction material..
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post #6 of 32 (permalink) Old 09-06-04, 03:46 AM
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Re: 3 inch vs twin 2 1/2

3inch cats into a 3 inch Y piece, into a Genie s/thru tornado muffler...
Heavenly.... wouldnt you agree Flyz...

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post #7 of 32 (permalink) Old 09-06-04, 03:52 AM
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Re: 3 inch vs twin 2 1/2

sounds nice brett, think mines sounds a bit tougher though :)

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

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post #8 of 32 (permalink) Old 09-06-04, 04:29 AM
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Re: 3 inch vs twin 2 1/2

my windsor is to be running twin 3" straight throughs. Thats for over 400hp though.
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post #9 of 32 (permalink) Old 09-06-04, 04:36 AM
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Re: 3 inch vs twin 2 1/2

Ahahahahahahahah im sure it was from my car mate echooing from the houses back into your window hahahah

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post #10 of 32 (permalink) Old 09-06-04, 04:36 AM
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Re: 3 inch vs twin 2 1/2

n/a, you would have no bottom end pwr what so ever with twin 3"s, a single 3" is more than enough for 400hp

std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer

http://www.fpvtickfordclubwa.com.au/phpBB2/index.php

http://www.tweecer.com

http://www.icenet.com.au/~pie
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