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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Again, excellent info I am stealing from another post because it it just to neat.

Quote:
Originally Posted by WinRice View Post
Not necessarily, you may be hitting the flow limits of your pump.

Look at the charts below, I couldn't find a chart for your 053, but the 979 is close:






Once you hit around 5.5 bar the flow rate drops drastically, and the current demand goes way up, indicating the pump is maxed out in efficiency.

Now lets look at the 044



You should be able to run that pump at 6 - 6.5 bar fine, giving a flow rate around 3.3 L/min (1650cc / 30 sec), which is close to the 1500cc / 30 sec given by the factory 930 system.

Also notice the big flow rate drop after 7.5 bar, if you need more than 7.5 bar with a good flow rate, a series pump system like the 930 is the way to go.

More pump info:

Bosch and Lucas Fuel pumps
Old 01-24-2010, 11:26 AM
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