injector size
Thread Starter
Joined: Oct 2007
Posts: 604
Likes: 1
From: Gainesville FL
injector size What is the biggest injector the stock ECU can drive . I was looken for a big set for my 408 supercharge build . I plan on running between 16-18lb of boost .
what blower, what power level are you looking? It is more dependent on the cars PCM hard coded limits than you asking a stock ECU can take. this limit is on a per year/per car basis.
For instance, the STOCK LS1 PCM/ECU can handle up to 32g/sec *maximum. which is a 253LB/hr injector.
So to answer your question, we need more information on your setup as IT IS IN THE DETAILS of your setup.
Also, what kind of fuel system are you going to use? being you are going FI, I would guess you are going to run a Fuel Pressure regulator, manifold referenced, and I guess a base pressure of 3 bar injectors so that you don't have ridiculous sized fuel pumps?
a 408 with 16lbs of boost supercharged....what 800RWHP? what supercharger?
If you are using a 2008 ~ 20xx year PCM from GM (i forget the years), you will likely have a limit of 63.49LB/hr or 8g/s
Bosch makes injectors all the way up to 2000cc/min @ 43.5psi (3bar), 211.7 LB/hr
you can then get into Moran motorsports that go larger and custom injectors....
at around 800-1k hp the 1000cc or 2000cc injectors will work fine
For instance, the STOCK LS1 PCM/ECU can handle up to 32g/sec *maximum. which is a 253LB/hr injector.
So to answer your question, we need more information on your setup as IT IS IN THE DETAILS of your setup.
Also, what kind of fuel system are you going to use? being you are going FI, I would guess you are going to run a Fuel Pressure regulator, manifold referenced, and I guess a base pressure of 3 bar injectors so that you don't have ridiculous sized fuel pumps?
a 408 with 16lbs of boost supercharged....what 800RWHP? what supercharger?
If you are using a 2008 ~ 20xx year PCM from GM (i forget the years), you will likely have a limit of 63.49LB/hr or 8g/s
Bosch makes injectors all the way up to 2000cc/min @ 43.5psi (3bar), 211.7 LB/hr
you can then get into Moran motorsports that go larger and custom injectors....
at around 800-1k hp the 1000cc or 2000cc injectors will work fine
99 trans am maximum fuel injector size is 253Lb/hr (32g/s) for the factory pcm.
So you will have plenty on that. dual 340s would work great at 43.5psi with some either 725cc (69#) or 850cc (80.95#) injectors and you would be golden. talk to Fuel Injector Connection for some injectors, see what they can do for you.
Being that I'm making ~700rwhp turbocharged, running 725cc injectors (837cc @58psi), you will be golden with some 850cc injectors at 43.5psi
So you will have plenty on that. dual 340s would work great at 43.5psi with some either 725cc (69#) or 850cc (80.95#) injectors and you would be golden. talk to Fuel Injector Connection for some injectors, see what they can do for you.
Being that I'm making ~700rwhp turbocharged, running 725cc injectors (837cc @58psi), you will be golden with some 850cc injectors at 43.5psi
