no downpipe
 

Exhaust restrictions on a turbo car rob power. So, why dont people pull off the downpipe alltogether while at the track. If nothing would get hurt from the hot exhaust under the hood then why not?

Re:no downpipe
 

i heard that with at least a short downpipe, the back pressure would help the turbo spool better and get a little more power....i could be wrong

Re:no downpipe
 

Im pretty sure you need atleast a little bit of back pressure.

I can notice a huge diference when im running just my downpipe(greddy) or my downpipe w/ my straight pipe.

Might not be true, but it feels like its quicker at lower speeds, and slower at higher speeds with just the downpipe. I have no idea whether thats true or not.

Re:no downpipe
 

I don't think that extra foot of pipe after the turbo is going to rob them any power. I'm sure it's just to kep the exhaust/heat out of the engine compartment. Just think about what would happen under your hood at 7000 rpm with no downpipe. Now imagine a backfire or something. :o
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Re:no downpipe
 

lets say i install my setup in my garage and want to take it somewhere else to have a downpipe made.

i shouldn't have any problem getting from my house to another garage w/o a downpipe, right?

should i just take it easy and try to keep low rpms?

Re:no downpipe
 

you shouldnt have to worry too much. my friend has been running a turbo and his integra with no downpipe for about a month now and no problems except black ---- in the engine bay from the exhaust gases...

Re:no downpipe
 

Exactly. You just have to worry about where the exhaust points so you don't melt anything.
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Re:no downpipe
 

exactly!

Re:no downpipe
 

ok thanks :D

Re:no downpipe
 

isnt it kinda loud. I drove mine around with no Down pipe and it makes the sound that would get me pulled over if there were cops around

Re:no downpipe
 

ok... lets see if i'm smart enough to explain this...


When the impeler spins on the turbo it creates turbulance right? right...

So if you have no downpipe the air is super turbulent after the impeler, but if you have a downpipe on their (or a short pipe minimum of 9 inches) it helps suck the turbulent air out. to a point, and it helps the air flow out of the turbo faster.

Re:no downpipe
 

uhmmmm I don't think it can get out nay faster as it doesn't have to travel trhu anything..after the impeller it's just open air, it's already out. And I've experienced that without downpipe it spooled up faster and had better top end to.