Where to set fuel pressure for optimum performance?

Kdubslugga

Active Member

Jun 7, 2003

1,515

3

38

Akron, OH

Dec 10, 2005

#1

• Dec 10, 2005

• #1

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

Member

Apr 8, 2004

791

2

16

El Paso, TX

Dec 10, 2005

#2

• Dec 10, 2005

• #2

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

Active Member

Jun 7, 2003

1,515

3

38

Akron, OH

Dec 10, 2005

#3

• Dec 10, 2005

• #3

Curse said:

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.

Click to expand...

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

Member

Apr 8, 2004

791

2

16

El Paso, TX

Dec 10, 2005

#4

• Dec 10, 2005

• #4

Kdubslugga said:

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!

Click to expand...

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

 

2badazzstangs

New Member

Apr 21, 2004

72

0

0

Jersey

Dec 10, 2005

#5

• Dec 10, 2005

• #5

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

 

P

PRO50SC

New Member

Dec 28, 2003

1,012

1

0

Olney, Maryland

Dec 10, 2005

#6

• Dec 10, 2005

• #6

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.