Turbos and catbacks?
Turbos and catbacks? Are they a bad mix? Can a catback cause the hot side to get overly hot due to backpressure? I have a Hooker now, but thinking about switching to something like the Loudmouth again, but I HATED the rasp it had.
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Im still chasing problems and its heat related. Between my vapor lock and boiling the PS fluid, Im going crazy. I figure the Hooker muff will be restrictive on a FI setup.
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Originally Posted by 52172
the loudmouth I bet won't have the rasp behind a turbo since the turbo muffles the sound and changes the exhaust pulses. Go with a LM and a cutout!
I have 4" Dynomax bullet. My 88mm turbo definitely took a lot of rasp out of it. Personally (older guy), the exhaust is a little loud for me so I might do a Splitflow like kp.
Originally Posted by Country Boy
umm.. why a cutout?
I heard when u left the Wed. meet and i think its to quiet and sounds bad through ur cat-back. It needs to breath, loudmouth won't sound the same as before, now with the turbo.
Ill probably do something different soon, but Im still curious about heat buildup. 
I run the hooker too and a cutout... if intrested, here's why:
I LIKE the sound of the hooker catback... but I read of two posts (outside of the myriad that say that the design of the hooker is not good for a turbo) where guys with cutouts and this catback with FM turbos got BIG gains and dropped serious spool time. These 2 users' gains were so high that I pestered them via PM.... I was a skeptic, and still am, but I'm hopeful.
I LIKE the sound of the hooker catback... but I read of two posts (outside of the myriad that say that the design of the hooker is not good for a turbo) where guys with cutouts and this catback with FM turbos got BIG gains and dropped serious spool time. These 2 users' gains were so high that I pestered them via PM.... I was a skeptic, and still am, but I'm hopeful.
I would think that any type of catback that produces a good amount of back pressure wouldn't be good for a turbo. I think that a LM with a true 3" straight through bullet would produce the least back pressure. If you have a 3" DP and that is sufficient, by the time the exhaust gasses get back to where the catback is they have cooled down some and should flow easier. The hotter the exhaust gas is the more it expands. As it cools some it needs less area to flow properly so a true 3" catback should pose very little if any restriction. Somebody correct me if I'm wrong but this is how I have designed exhaust systems over the years (NA of course). I too will be using a LM with a true 3" bullet muffler.
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Joined: Jul 2005
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Originally Posted by Frost
I LIKE the sound of the hooker catback... but I read of two posts (outside of the myriad that say that the design of the hooker is not good for a turbo) where guys with cutouts and this catback with FM turbos got BIG gains and dropped serious spool time. These 2 users' gains were so high that I pestered them via PM.... I was a skeptic, and still am, but I'm hopeful.
Mike
Originally Posted by engineermike
Not sure if you're referring to me. . . but I had good luck with the 3" Aerochamber cat-back on my 550 rwhp supercharged combo. However, the 3.5" Aerochamber was really holding back my 700 rwhp turbo combo.
Mike
Mike
No, but now that you mention it, I remeber you having said that as well... Did you get a chance to check it against an open cutout to see what the difference was?