need injector advice
need injector advice im running stock injectors on my 2001 ls1 camaro and a 150 shot of gas , what size are the stock injectors ? should i up grade? if so to what size / and what mileage should i look at replacing them ? im at 44,000 miles
on a 2001 they are 28.8lb/hr injectors
how much more power are you planning on going?
you can get away with 32#/hr or 37b/hr, 38#, or even 42#/hr and be fine idling and WOT
IF you bought the above injectors I named off at a rating of 43.5psi, they would actually be : at our fuel rail pressure:
If you don't plan on making more than 500 rear wheel HP I would just recommend getting 36.5lb injectors
http://www.racetronix.com/
If you planned on being above 500HP then I would get the 42#, if not stick with the #37 or 38#
how much more power are you planning on going?
you can get away with 32#/hr or 37b/hr, 38#, or even 42#/hr and be fine idling and WOT
IF you bought the above injectors I named off at a rating of 43.5psi, they would actually be : at our fuel rail pressure:
If you don't plan on making more than 500 rear wheel HP I would just recommend getting 36.5lb injectors
http://www.racetronix.com/
If you planned on being above 500HP then I would get the 42#, if not stick with the #37 or 38#
Staging Lane
Joined: Apr 2008
Posts: 55
Likes: 0
Let us assume that your car is around 350 hp (+/-) 10 hp, and 150 hp will be shot of gas. So, your engine will run 500 hp. Calculate it this way, hp= lb/hr x no of injectors x 2 x 0.9 , therefore lb/hr = hp/(no of injectors x 2 x 0.9)
lb/hr= 500/(8 x 2 x 0.9) = 34.8 lb/hr, so you should be fine with 36, but watch out for the rail pressure, if the 36 lb/hr injectors are rated at 45 psi and the rail pressure is 60 psi, each will deliver flow of 42 lb/hr and the tuning part will be difficult especially the idle.
lb/hr= 500/(8 x 2 x 0.9) = 34.8 lb/hr, so you should be fine with 36, but watch out for the rail pressure, if the 36 lb/hr injectors are rated at 45 psi and the rail pressure is 60 psi, each will deliver flow of 42 lb/hr and the tuning part will be difficult especially the idle.
Teching In
Joined: May 2008
Posts: 23
Likes: 0
From: Sebring, Fl
Let us assume that your car is around 350 hp (+/-) 10 hp, and 150 hp will be shot of gas. So, your engine will run 500 hp. Calculate it this way, hp= lb/hr x no of injectors x 2 x 0.9 , therefore lb/hr = hp/(no of injectors x 2 x 0.9)
lb/hr= 500/(8 x 2 x 0.9) = 34.8 lb/hr, so you should be fine with 36, but watch out for the rail pressure, if the 36 lb/hr injectors are rated at 45 psi and the rail pressure is 60 psi, each will deliver flow of 42 lb/hr and the tuning part will be difficult especially the idle.
lb/hr= 500/(8 x 2 x 0.9) = 34.8 lb/hr, so you should be fine with 36, but watch out for the rail pressure, if the 36 lb/hr injectors are rated at 45 psi and the rail pressure is 60 psi, each will deliver flow of 42 lb/hr and the tuning part will be difficult especially the idle.
If the injectors are 33lbs @ 60 psi and you install 42lbs the car will run rich thru the whole power range, and would have to be tuned.
would that a good assumtion??
if you install ANY injectors LARGER than your current ones and DON'T TUNE IT it will run rich regardless
Injectors are rated usually at 43.5psi... apparently 45psi is the new thing??? wheres all this 45psi coming from??
and then injectors are rated at 5x psi?
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Staging Lane
Joined: Apr 2008
Posts: 55
Likes: 0
ZL1Killa,
Please read the gray color down of the table in the below link
http://www.fuelairspark.com/Products...ection_468.asp
Please read the gray color down of the table in the below link
http://www.fuelairspark.com/Products...ection_468.asp
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I had an issue tuning FAST 36 lb/hr injectors in an LS1 and went back and forth with FAST on the flow rating. Turns out the 45 psi should be 43.5. You would think they would fix their website.
