Where to set fuel pressure for optimum performance?

[Kdubslugga]

Alright, winter project is under way, "Its the bolded mods in my sig" anyways just got a Fuel Pressure regulator and guage. My fuel pressure is at 43-44psi with the Vac line off, im told this is somewhat rich. Now a few months ago 5.0 mustang had an article where they leaned theres out from 42 psi to 39 and gained 6 HP to the wheels. Does 39 sound like a good spot to run my car at?? Dont know if it matters but the supercharger will not be going on until late spring!

 

[Curse]

No one can really tell you your optimal FP without a dyno or track results. You are not doing any real power adder mods, so I don't think you need to up your fuel pressure. 40psi with vac line off should be fine. Also for your combo 30lb injectors are overkill, I would hold off till you put on the blower.

 

[Kdubslugga]

No one can really tell you your optimal FP without a dyno or track results. You are not doing any real power adder mods, so I don't think you need to up your fuel pressure. 40psi with vac line off should be fine. Also for your combo 30lb injectors are overkill, I would hold off till you put on the blower.

Oh yeah I know, ill be using the 19lb injectors until i use the blower, even then i think it may be to much, but i have plans for heads soon too, so i dont wanna get 24lbers and then 30lbs!

 

[Curse]

Oh yeah I know, ill be using the 19lb injectors until i use the blower, even then i think it may be to much, but i have plans for heads soon too, so i dont wanna get 24lbers and then 30lbs!

Yeah that wouldn't be to smart. I think the 19lb injectors should be fine. Good luck

 

[2badazzstangs]

I have 30 lb injectors and a procharger p600b and am at 38 lbs at idle and about 80 under boost.

 

[PRO50SC]

If you're gonna run a blower, go with 42's so you don't have to run an FMU. I wish someone woulda' told me that so I wouldn't have wasted my money.