I think I'm going to plumb a pipe from each turbo out the back with a muffler on each. FWD, so there should be an ok amount of room. Since 3" single pipes seem pretty popular, I'm thinking 2.5" pipes should be plenty big enough for this. Thoughts?
2.5" piping would be perfect for this. 3" is a little overkill.
Just make sure that you have an "H" pipe, or crossover installed into the exhaust. It's basically a small piece of pipe that's the same diameter as the other piping that connects to each pipe that comes off the turbos. This will equalize the exhaust pulses, and keep it from sounding too high-pitch and raspy. Without this your car will sound like two individual 3 cylinder engines.
If you need a diagram, I could probably find one for you.
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1995 3000GT FWD Twin Turbo
16psi, 450s, E85
13.52 @ 110.56 with a 2.17 60'...13psi.
332FWHP-342TQ...16psi with many boost leaks.
SOLD 8-09 :-(
2005 Crystal Gray Metallic STi
*far from stock* Totalled by a 16yr old girl 10-26-09
Current: 2006 Cool Silver Metallic Evo IX SE - not stock
I think I've read here that an h or x pipe is pretty pointless for a turbo application and may actually be a bad thing. Apparently the turbos absorb the exhaust pulses.
The sound is another thing, though. I'm not at all sure how it would sound. I've never heard two turbo geo metros race each other, but the idea of that kind of hurts my brain...
2.5" piping would be perfect for this. 3" is a little overkill.
Just make sure that you have an "H" pipe, or crossover installed into the exhaust. It's basically a small piece of pipe that's the same diameter as the other piping that connects to each pipe that comes off the turbos. This will equalize the exhaust pulses, and keep it from sounding too high-pitch and raspy. Without this your car will sound like two individual 3 cylinder engines.
If you need a diagram, I could probably find one for you.
Are you sure? Cuz most V8s I've heard don't sound like two 4 bangers strapped together.
I'm not doubting you, you seem to know more about this than I do. I was just wondering...
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"All that waving around, and you didn't even put it on my tummy?"
Oh, forgot, Where should I put my wideband? Currently only my front O2 has a bung. Is that OK?
Front o2 is going to be too close to the turbo and the sensor will go bad quickly. Mount the sensor 18-24" from the turbo, at the 10 or 2 oclock position.
You're going to need 2 widebands. And they should be atleast 18" from the turbo or else the sensor will go bad in a short time.
mistermoonpie,
youtube a 300zx TT that doesn't have an H pipe, they sould like a Honda.
Since I don't think I'll have the capability to tune the banks individually, wouldn't another wideband be a little bit overkill? I have a plx wideband controller that can simulate a narrowband. I'm thinking I'll just have a stock O2 on one side and run the wideband on the other and I'll run both into the ecu to keep it happy. That is, unless it would be better to keep the ecu out of the question altogether. I'm not sure about that yet.
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What size piping for true dual exhaust?
