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Old Dec 15, 2012 | 07:28 AM
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Selbyl
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Joined: Jun 2012
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From: Derby, KS
Default Re: Turbo-New ideas & input

Originally Posted by MrMoPar
If running low boost, all an intercooler is going to do is kill your boost in lower gears. Run water/meth, much easier and more effective on a turbo. For an oil scavenge pump, make sure to use a brass gear rotor design, not a modified rubber diaphragm based pump, as they always leak all over the place. The big issue with turbo fuel control is that the boost is not linear. You can have near max boost with very little throttle opening. The design has to be able to interpret the boost and match the fuel regardless of percent throttle opening. Closed loop o2 sensor feedback operation is where all the trouble shows up. In closed loop, the ecu targets 14.7 afr regardless of anything else.
With a rear mounted turbo is an intercooler even needed? I've done a bit of reading and because of the location the intake temps are already much lower than if the turbo was under the hood. Also how much boost do we plan on pushing? Without an intercooler it looks like at 10psi we'll be right at 290hp at the crank I believe. I'll post my numbers when I find the link I used.
 
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