My car is a 95GT vert, Edelbrock heads, ported Cobra intake, crane 2031 w/ 1.7RR's, full exhaust, tons of other bolt ons.
30lb injectors, brand new Kirban AFPR, Walbro 255lph pump, new fuel filter.
At 35psi, it was running at 16:1 A/F ratio! It took 47psi at idle, with no vacuum, to get even close to 13.5 ratio. That's 30lb injectors on an N/A 302! There was definitely a power gain when I got it at 13.5:1.
What the heck is up with that? It idled between 14-15:1, is that normal? When I would let off the gas, it would go rich at 12:1.
I always thought my car was running rich, from the exhaust smell and its pigginess under 3000rpms. Plus the fact that it backfired after idling forever. When I got my AFPR, I dropped the fuel pressure from 40psi to 35psi and could've sworn I gained power.
I recalibrated the brand new LM1 a second time just to make sure. Same results.
Why do I need 47psi to get a desireable A/F mix with 30lb injectors?
30lb injectors, brand new Kirban AFPR, Walbro 255lph pump, new fuel filter.
At 35psi, it was running at 16:1 A/F ratio! It took 47psi at idle, with no vacuum, to get even close to 13.5 ratio. That's 30lb injectors on an N/A 302! There was definitely a power gain when I got it at 13.5:1.
What the heck is up with that? It idled between 14-15:1, is that normal? When I would let off the gas, it would go rich at 12:1.
I always thought my car was running rich, from the exhaust smell and its pigginess under 3000rpms. Plus the fact that it backfired after idling forever. When I got my AFPR, I dropped the fuel pressure from 40psi to 35psi and could've sworn I gained power.
I recalibrated the brand new LM1 a second time just to make sure. Same results.
Why do I need 47psi to get a desireable A/F mix with 30lb injectors?