Fuel Pump Rewire |
Fuel Pump Rewire |
Jul 30 2006, 11:37 PM
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#1
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Web Administrator Yo! Group: Admin Posts: 516 Joined: 30-August 04 From: Mackinaw, IL Member No.: 376 |
This weekend's project was rewiring the stock fuel pump with 10ga wire straight off the battery and adding a 8ga ground. I have always heard this is a worth while mod but never read what kind of gains should be expected. Take a guess at what my results were.
*Note: Pulls were three days apart with very similar intake and coolant temps(aka no fuel trim alterations). In fact I found a portion of the log where I was in the same gear with the same intake temp, and the exact coolant temp~freaky~. -------------------- Fast & Furious on the outside...DSM under the hood!!!
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Jul 31 2006, 06:23 AM
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#2
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DSM Tech Wizard Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10 |
According to RRE... you should see almost 40% gains in volume at the same pressure.
Taken from RRE's website for the stock pump - 100 lph @43psi @12v 140 lph @43psi @14v -------------------- The fastest car I own is a minivan....
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Jul 31 2006, 08:33 PM
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#3
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Web Administrator Yo! Group: Admin Posts: 516 Joined: 30-August 04 From: Mackinaw, IL Member No.: 376 |
My Observation: I am running O2 feedback on the wideband. The corrections that I was seeing after the rewire on average were 5%. That is, to meet the target air/fuel ratio the ecu was pulling 5% fuel from the stock fuel map.
Now after thinking about this... I am still running the stock FPR. If rewiring increased the fuel flow, but I did not change the tune to allow more fuel through the injectors, wouldn't I just be returning more fuel to the tank? Maybe my 5% increase was from slightly overflowing the FPR resulting in a pressure increase. I guess it is time to slowly crank the boost until the AFR falls off -------------------- Fast & Furious on the outside...DSM under the hood!!!
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Aug 1 2006, 08:38 AM
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#4
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
QUOTE (99Spyder @ Jul 31 2006, 08:33 PM) I guess it is time to slowly crank the boost until the AFR falls off Or rather, until you start knocking and then back it off some. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Aug 1 2006, 07:06 PM
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#5
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Web Administrator Yo! Group: Admin Posts: 516 Joined: 30-August 04 From: Mackinaw, IL Member No.: 376 |
On the contrary, dial in the AFR, add timing until it knocks, then back it off some
-------------------- Fast & Furious on the outside...DSM under the hood!!!
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Lo-Fi Version | Time is now: 19th May 2024 - 09:43 AM |