Thread: LPFP Tech info
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      01-22-2013, 10:34 AM   #177
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Drives: e92 335xi
Join Date: Jan 2013
Location: NY

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Originally Posted by ign335i View Post
Why is the pressure dropping? Because there isn't enough flow out of the stock setup. If you are increasing horsepower you are increasing air flow which means you need to increase fuel flow to hit your lambdas. None of this requires you to need more pressure. The pressure is dropping at these flow rates because the stock pump has hit a flow wall.

I think Tony knows the fuel is receiving heat. The point is it is such a miniscule amount that you probably wouldn't even be able to measure a difference in temperature.

Well yeah but aren't you increasing flow to the HPFP? And that system has no return so while you could theoretically increase flow once you hook it up to the car you will only get what the HPFP allows. I mean its great to say you could theoretically flow xyz. But, until you actually hook it up to the car and try it you don't know what it will do.