Injector size
Thread Starter
Tech Contributor
Joined: Mar 2003
Posts: 12,093
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Injector size
At what point should you go to bigger sized injectors? Are 32lb good for 450-475rwhp? Any disadvantage to using bigger injectors than needed?
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Re: Injector size (SpinMonster)
depends on the application. I have 525 RWHP on the juice, but I use a wet kit. The stock injectors are fine (28.5#). If you were to do a turbo dry N2O, or S/C application, then you would need to upgrade the injectors. KingPin's twinturbo set up uses 50# injectors.
Safety Car
Joined: Nov 2000
Posts: 4,004
Likes: 2,582
From: Northern VA, USA
Re: Injector size (SpinMonster)
From what I've seen, each individual car is different. My LT1 made 415 RWHP with 24 lb injectors, and all the formulas say it shouldn't. The best way to tell is to make your mods and scan/dyno tune the car to see if you are getting enough fuel or are going lean, and to see what the duty cycles are.
Obviously, you won't make 600 NA RWHP with stock injectors :) There are some formulas there, that are good guidlines:
http://www.fbody.com/calc.htm
Go towards the end of the page.
32 lbs are probably good for your goals.
Injectors too big may cause drivability issues, as at low RPM or part throttle, the injectors would be on for too short of a time to properly control the fuel.
[Modified by z28lt1, 8:12 PM 6/10/2003]
Obviously, you won't make 600 NA RWHP with stock injectors :) There are some formulas there, that are good guidlines:
http://www.fbody.com/calc.htm
Go towards the end of the page.
32 lbs are probably good for your goals.
Injectors too big may cause drivability issues, as at low RPM or part throttle, the injectors would be on for too short of a time to properly control the fuel.
[Modified by z28lt1, 8:12 PM 6/10/2003]
Safety Car
Joined: Mar 2002
Posts: 4,928
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Cruise-In V Veteran
St. Jude Donor '09
Re: Injector size (z28lt1)
:iagree: :yesnod: :yesnod: Here's an excellent site http://www.rceng.com/ :thumbs:
joel(Bink) :cheers: :steering:
joel(Bink) :cheers: :steering:
