Which Fuel Injectors?
Thread Starter
Intermediate
Joined: Apr 2016
Posts: 44
Likes: 3
From: Hollywood Florida
Which Fuel Injectors?
Would someone please shed some light on why there are different size fuel injectors? I see for the LS1 it's 43 psi, but why a 34# or 60# and so on? How do you properly size them for your application?
Melting Slicks
Joined: Sep 2008
Posts: 3,138
Likes: 802
From: Espanola New Mexico
Fuel injectors
The higher numbered fuel injectors will allow more fuel for your application, if you have headers, high performance cam and heads, maybe turbo, or supercharger. The number has nothing to do psi, you want to avoid to high an injector duty cycle when tuning an engine so you install higher capacity fuel injectors.
Thread Starter
Intermediate
Joined: Apr 2016
Posts: 44
Likes: 3
From: Hollywood Florida
The higher numbered fuel injectors will allow more fuel for your application, if you have headers, high performance cam and heads, maybe turbo, or supercharger. The number has nothing to do psi, you want to avoid to high an injector duty cycle when tuning an engine so you install higher capacity fuel injectors.
Thank you mmartinez for your help!!
Safety Car
Joined: Mar 2005
Posts: 3,757
Likes: 1,215
From: Wisconsin
Last edited by feeder82; Apr 28, 2016 at 04:56 PM. Reason: fixed link
Thread Starter
Intermediate
Joined: Apr 2016
Posts: 44
Likes: 3
From: Hollywood Florida
Thank you sooo much. A quick (well, maybe not so quick 
) lesson can be found in this link. I highly recommend it to anyone with sleep empathy! 
Pro
Joined: May 2014
Posts: 670
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From: Indiana
digmyvette,
I saw your plans on the thread where you were looking for help with a vibration issue. The cam you mentioned there was one that Comp recommended to me last summer when I was rebuilding my engine as it was similar to the trashed cam that I pulled out of the engine. I noted that I wanted to give up a little on the low end for some more on the top and they recommended their 54-428-11 cam with basically more duration than what you are looking it. Engine also has the Weiand/Lingenfelter intake manifold, long-tube headers, x-pipe, Corsa Indy exhaust, and ported and slightly milled 243 heads. I put 42# injectors on that setup which seems to have been the correct choice.
I saw your plans on the thread where you were looking for help with a vibration issue. The cam you mentioned there was one that Comp recommended to me last summer when I was rebuilding my engine as it was similar to the trashed cam that I pulled out of the engine. I noted that I wanted to give up a little on the low end for some more on the top and they recommended their 54-428-11 cam with basically more duration than what you are looking it. Engine also has the Weiand/Lingenfelter intake manifold, long-tube headers, x-pipe, Corsa Indy exhaust, and ported and slightly milled 243 heads. I put 42# injectors on that setup which seems to have been the correct choice.
Last edited by enoniam; Apr 28, 2016 at 02:28 PM.
Thread Starter
Intermediate
Joined: Apr 2016
Posts: 44
Likes: 3
From: Hollywood Florida
digmyvette,
I saw your plans on the thread where you were looking for help with a vibration issue. The cam you mentioned there was one that Comp recommended to me last summer when I was rebuilding my engine as it was similar to the trashed cam that I pulled out of the engine. I noted that I wanted to give up a little on the low end for some more on the top and they recommended their 54-428-11 cam with basically more duration than what you are looking it. Engine also has the Weiand/Lingenfelter intake manifold, long-tube headers, x-pipe, Corsa Indy exhaust, and ported and slightly milled 243 heads. I put 42# injectors on that setup which seems to have been the correct choice.
I saw your plans on the thread where you were looking for help with a vibration issue. The cam you mentioned there was one that Comp recommended to me last summer when I was rebuilding my engine as it was similar to the trashed cam that I pulled out of the engine. I noted that I wanted to give up a little on the low end for some more on the top and they recommended their 54-428-11 cam with basically more duration than what you are looking it. Engine also has the Weiand/Lingenfelter intake manifold, long-tube headers, x-pipe, Corsa Indy exhaust, and ported and slightly milled 243 heads. I put 42# injectors on that setup which seems to have been the correct choice.
Safety Car
Joined: Mar 2005
Posts: 3,757
Likes: 1,215
From: Wisconsin
Ahh posted the link from my phone in my last post never copies right here's the working link 
http://fuelinjectorclinic.com/flow-calculator
http://fuelinjectorclinic.com/flow-calculator
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Thread Starter
Intermediate
Joined: Apr 2016
Posts: 44
Likes: 3
From: Hollywood Florida
Ahh posted the link from my phone in my last post never copies right here's the working link
http://fuelinjectorclinic.com/flow-calculator
http://fuelinjectorclinic.com/flow-calculator
