Running lean on a 150 shot wet
03-11-2009, 09:02 PM
#22
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Racetronix hotwire kit will be here tomorrow. Hopefully that solves the problem? Ive been reading that the factory wiring is not up to par when using a bigger fuel pump like the walbro 255. I also read that the factory fuelpump wiring is only 18 gauge, Thats not going to flow enough current to support that pump.
03-21-2009, 05:17 PM
#23
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Im having this exact same problem with my ls1 on 150 on a NOS wet kit, same walbro 255 lph pump, but i have a voltage booster harness hooked up, goes from 62-64 psi idle, 56-58 WOT motor, and drops to 50 psi on the 150 and the fpss cuts the system, ran it on the dyno with no fuel jet and still 13.6:1 A/F across the board.
03-21-2009, 10:56 PM
#24
i never had that problem with my lt1 even with a stock pump and plate kit....i then put in a hotwire kit and 255 pump still no problem runs just right (afr)...i think you might hava a fuel issue as well...id say change the fuel filter but check pressure for sure...you can even use a amperage tester and test before and after the fuel pump to see whats goin on....if ur pump is bad..and compare to ur new one
03-22-2009, 11:09 AM
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I got my hotwire kit installed and a new fuel filter. Just need to hit the dyno now. My voltage did seem to go up a little with the hotwire kit, so im hoping this solves my problem
03-22-2009, 11:13 AM
#26
I am guessing thats because the nitrous will flow to the engine faster than the fuel for a moment because the nitrous is at 1050# and the fuel might be at 58#. Difference in pressure?
