Anyone no limits on hp with 4" exhaust

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07-23-2013, 08:27 AM

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Anyone no limits on hp with 4" exhaust

Hi guys, i have a straight through 4 inch single exhaust on my 406 cubed ls2 with a pt 8847, im at 850 wheel hp, has anyone done any back to back testing to see what the limit is for a single 4 inch exhaust?

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07-23-2013, 09:35 AM

Tiago

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you're nowhere near it. I saw some restrictions around 1400 RWHP on a supra with 4" straight through....

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07-23-2013, 09:47 AM

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Ahh ok sweet, thanks

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07-23-2013, 11:17 AM

a-low

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Got any pictures of your set up?

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07-23-2013, 11:29 AM

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Quote:

Originally Posted by a-low

Got any pictures of your set up?

Ive tried to upload pics but its just not working. You can see the setup in my other thread.

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07-23-2013, 11:41 AM

LS1NOVA

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Dyno tested open 24" long 4" downpipe vs full single 3.5" exhaust with straight through Magnaflow muffler and saw no difference at 950whp. Single PT88 5.3.