Single turbo vs Twin
Single turbo vs Twin Any one have any hard evidence that proves that one a single turbbo set up equal length manifolds is important and is having onel side cross over to the other hurt anything?
The biggest thing is to keep the entire hot side as short as possible. When you cross one bank over, you lose heat energy and gas velocity that could be used to drive your turbine. Read "turbocharging" by Corky Bell--its a good read, and though some of the information is dated, it explains everything you really need to know fundamentally in detail. 
The biggest thing is to keep the entire hot side as short as possible. When you cross one bank over, you lose heat energy and gas velocity that could be used to drive your turbine. Read "turbocharging" by Corky Bell--its a good read, and though some of the information is dated, it explains everything you really need to know fundamentally in detail.
Got ya i know my buddies got a big single on his 6.0 and the driver side exhaust tube runs all the way to the pass side where the turbo is before it get to the hot side of the turbo and the pass side i know is a much shorter distance...i thought you wanted them both equal distance from each bank
I don't think equal length headers in turbos is that important, because the engine is pushing spent gas out of the combustion chamber into high pressure. Equal length works on NA setups when your trying to time pulses to help scavenge pulses from other cylinders out of the motor using high and low pressure areas. With turbos the entire exhaust system before the turbo when in boost is all high pressure. There are no high and low pressure zones, not like an NA motor anyway.
Staging Lane
Joined: Sep 2008
Posts: 99
Likes: 0
From: MI
not if you size A/R and pipe diameter accordingly
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Verdad Gallardo Staging Lane
Joined: Sep 2008
Posts: 99
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From: MI
So, you're telling me that I can bolt a properly sized turbo straight to the tail pipe of my pickup so long as I decrease the diameter of the exhaust to compensate for exhaust gas volume, and it would work the same as if it were bolted straight to the end of the manifold? Sorry, not buying it. The more heat you lose, the more your exhaust turbine is going to struggle to do its job. The only cure for this, (like DrTurbo said) is to decrease DISTANCE. Exhaust wraps, stainless hot sides, and smaller diameter pipe all help, but you can't combat the fact that as the gases in the exhaust travel further and further from the valve, the pressure decreases and therefore cool off more. You lose your exhaust heat energy, and you lose races to cars that don't, bottom line.
Last edited by deadhorse66; Jan 16, 2009 at 01:03 AM.
hot air is bigger in volume then cold air and that makes the turbo spool quicker. that is the whole point of having the turbo up front. next time you play with you balloons take one out where it is hot and the other one where it is cold and see what happens to them. have fun