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Which is the best brand? Will setting it to 40PSI with my mods do much? I hear 40PSI is the best?? had gasket issues when I did this mod on a TPI Camaro. Might want to try it again if its headache free and good results?
I don't care for my accel. It does allow you to tune your car for a little more HP. I can't get my pressure below 44 psi on mine. I dunno what the deal is, but I guess its ok because I run mine at 48 psi with good results.
I like the HyperTech unit because it takes a wrench for easy adjustment.
Put an ACCEL FP gauge on the fuel rail before you do the AFPR and record the stock pressure reading at idle with vac line disconnected. This will be your baseline setting for the AFPR.
With my mods I'm running 47-48 psi and the air/fuel ratio at WOT is about 12.6-12.8, or 910-920mV at the O2 sensor.