EFIDynoTuning Forum

decipha wrote: ↑2022 Aug 10, 19:31 you can 40 psi base with the 80s no prob or 65psi if you plan on making 800rwhp

read the fuel write up on the homepage

you have to download the injector data sheet for your injectors and then interpolate all the deltap multipliers for 60 psi

come up with all the actual values and then set the high slope in the tune to 30 lbs/hr

then take 30 and divide your actual high slope that becomes your scaling percentage

apply that to all your actual injector values other than the offset and plug that in to your tune

apply the scaling percentage to the actual maf transfer and transient fuel too.

Its covered in the fuel write up.

btw sct sucks for the eec's (2004 and older). Youd be far better off getting a quarterhorse.

decipha wrote: ↑2022 Aug 10, 19:31 you can 40 psi base with the 80s no prob or 65psi if you plan on making 800rwhp

read the fuel write up on the homepage

you have to download the injector data sheet for your injectors and then interpolate all the deltap multipliers for 60 psi

come up with all the actual values and then set the high slope in the tune to 30 lbs/hr

then take 30 and divide your actual high slope that becomes your scaling percentage

apply that to all your actual injector values other than the offset and plug that in to your tune

apply the scaling percentage to the actual maf transfer and transient fuel too.

Its covered in the fuel write up.

btw sct sucks for the eec's (2004 and older). Youd be far better off getting a quarterhorse.

decipha wrote: ↑2022 Aug 08, 21:23 If I were to tune it then I would set it to 60psi base pressure

if its already tuned though you have to set it to the pressure the tuner tuned it at.

47s are a waste stock is 42
best bet is 80lb minimum

decipha wrote: ↑2022 Aug 08, 14:54 on a stock lightning/harley with stock fuel pressure regulator it should be around 32 psi at idle and should jump up to 40psi with the vac line removed.