Higher FP or bigger injectors?
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Higher FP or bigger injectors?
Hi...
What are the pro/cons of getting bigger injectors vs. raising the FP?
For my app:
I need bigger injectors I have found 2 that looks good
- 65 lbs p/h
- 57 lbs p/h
What would be best
- use the 65 at 43 psi or
- use the 57 with rasied FP to gain better spray pattern, maybe?
/N.
What are the pro/cons of getting bigger injectors vs. raising the FP?
For my app:
I need bigger injectors I have found 2 that looks good
- 65 lbs p/h
- 57 lbs p/h
What would be best
- use the 65 at 43 psi or
- use the 57 with rasied FP to gain better spray pattern, maybe?
/N.
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Ok, but if I go #57 and raise the FP so that they will be #65, how about the spray pattern?
#65 at 43 psi vs #65 at 55 psi?
/N.
#65 at 43 psi vs #65 at 55 psi?
/N.
Joined: Jul 1999
Posts: 12,093
Likes: 126
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Get the largest injectors you can afford.
Up the fuel pressure. I'm running around 50psi at idle.
Then set the bpw really low.
Don't listen to folks running stock setups and expect any sort of advice on injector selection. Leave it up to the diy_prom guys who have experimented with multiple setups.
-- Joe
Up the fuel pressure. I'm running around 50psi at idle.
Then set the bpw really low.
Don't listen to folks running stock setups and expect any sort of advice on injector selection. Leave it up to the diy_prom guys who have experimented with multiple setups.
-- Joe
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Dont worry about spray patterns.

