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Procharged LT1 383, what injectors?

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Old Sep 25, 2007 | 08:12 PM
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From: Leon Iowa
Default Procharged LT1 383, what injectors?

My buddy just bought a 1995 Camaro z28 and it has the ATI procharger, 383 stroker with the FAST stand alone injection system. It currently has 42# injectors. To me that sounds really small for what he has but what do you all think? The car does not run like it should.
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Old Sep 25, 2007 | 11:26 PM
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well he has the FAST on there so i would problly go with something he can grow into like a 75 or 85 lber. i would recommend he change out the 42s for at least a set of 60lb for what he has now though.
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Old Sep 25, 2007 | 11:27 PM
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+1 on 60# injectors...
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Old Sep 25, 2007 | 11:48 PM
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yea well the car isn't even tuned yet and the guy before had the 42 in. I mean this things runs like ****. I was kinda wanting to put an injector in that would be close just so we can tune it.
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Old Sep 25, 2007 | 11:57 PM
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truns liek crap bc its got 42 in it when its supposed to be 24's....id put some stockers in it until you get it tuned you can tear up the motor by running too much gas and waching the oil off the rings...buy some 60's and install right before you dyno it...
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Old Sep 25, 2007 | 11:59 PM
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would you happen to know how much fuel pressure he should be running?
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Old Sep 26, 2007 | 12:01 AM
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Yea he bought this car on ebay and damn! what a mess. they cut the factory PCM out and just left wires hanging. It needs alot of work for sure
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Old Sep 26, 2007 | 08:23 AM
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Originally Posted by mvvette97
would you happen to know how much fuel pressure he should be running?
You can run whatever FP you want. Now, if you are trying to adjust for the injectors based on how the stock pcm works... have the fuel pressure set at 43.5psi.
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Old Sep 26, 2007 | 01:51 PM
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Since you are buying new injectors, consider going straight to 72# ones if you plan to run high boost. AFAIK, they are the largest hi-impedance ones available from a company I trust - Delphi via RCEngineering.

Jim
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Old Sep 26, 2007 | 03:07 PM
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Originally Posted by DeltaT
Since you are buying new injectors, consider going straight to 72# ones if you plan to run high boost. AFAIK, they are the largest hi-impedance ones available from a company I trust - Delphi via RCEngineering.

Jim
Not worth it. He has a FAST setup, so he can run low impedence injectors... they are cheaper $$ and will perform better.
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Old Sep 26, 2007 | 07:49 PM
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Yea, with FAST no reason to stay high imp. Might as well put in some 84's or 96's. The price is the same. I think the 84's are about as big as you can go and still keep it lean at idle, but others seem to have luck going higher.

Mike
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