CLASS RACER FORUM - View Single Post

Ed Wright · 10-27-2011, 02:50 PM

The voltage compensation table is to correct injector pulse width, but that has much more effect at lower RPM, not so much at higher RPM. Adjust that table at one RPM and you won't see the same A/F change at all RPM. More low, less up high. The correct way to address it is upgrading the electrical system to stabalize the voltage. EFI cars, IMHO, should have 2 16 volt batteries or an alternator if 12 volts. Low voltage will certainly lean an EFI car because the injectors open slower. I had two 12 volt batteries with an alternator in mine, everything was fine until it suddenly began to kick alternator belts off. I could kiss about .05 worth of ET goodbye when it did that.

10-27-2011, 02:50 PM	#19
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel pump amperage draw? The voltage compensation table is to correct injector pulse width, but that has much more effect at lower RPM, not so much at higher RPM. Adjust that table at one RPM and you won't see the same A/F change at all RPM. More low, less up high. The correct way to address it is upgrading the electrical system to stabalize the voltage. EFI cars, IMHO, should have 2 16 volt batteries or an alternator if 12 volts. Low voltage will certainly lean an EFI car because the injectors open slower. I had two 12 volt batteries with an alternator in mine, everything was fine until it suddenly began to kick alternator belts off. I could kiss about .05 worth of ET goodbye when it did that. __________________ Ed Wright 4156 SS/JA