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Well I rigged my gauge up to the windshield and here are the things I noticed.
- Base pressure was 42psi
- car has vac reading of 16 and raising it to 0 the pressure stayed at 42 and didn't raise 8 psi like I believe it should have. (probably due to the walbro 255 pump flowing more at idle....)
- At 10psi of boost, fuel pressure was 52psi
- Boost creeped due to 2.5" exhaust and fuel pressure increased with it.
- Car spools to 10psi by 3k, but misfire keeps occuring around 4800rpm, long after it's been at 10psi
- A/F ratio stays right around .9V and does not drop or increase
- minimal counts of knock ( 4-5 counts max)
- no timing retardation
only mods are 2.5" catback exhaust and walbro 255 pump
I'm thinking that this is too high of pressure and volume for the stock setup and that I'd need an adjustable regulator to lower the pressure down a ways...
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