Adjustable FPRs?

#1

What’s the reasoning behind allowing adjustable FPRs? Seems like a weird allowance given we can’t modify injectors or the ECU.

#2

Great question; I was wondering the same thing…

#3

Early-on, we were not 100% sure how the cars would do with high-rpm running, regarding air/fuel ratios. Allowing an adjustable fpr is a quick, simple, and easy way to boost fuel, if it was ever needed, which it is not.

We didn’t want to continue down that road with ecu and injectors because thoses are getting more complex. Not too complex, but more complex. We had to allow ourselves some wiggle room but had to cut it off somewhere.

I don’t know if anyone is running an adjustable fpr and the cars are doing just fine.

Carter