383 TPI
09-05-2014, 05:45 PM
#1
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Engine: 383
Transmission: 700r4
Axle/Gears: 3.73
383 TPI
I have a 383 TPI with about 9.5:1 compression, 2.02 intake valves, ported/polished heads and running 700r4 trans. I was wondering what size injectors I should run? Suggestions are greatly appreciated..
09-06-2014, 08:16 AM
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Car: 87 IROC
Engine: L31 350
Transmission: T56
Axle/Gears: 4.10 D44
Re: 383 TPI
What cam? What is your target horsepower? Read this. Southbay is a sponsor here too!
These 27#ers are good to 350hp @ 80% or may be able to squeeze 400hp @ 90%.
These 27#ers are good to 350hp @ 80% or may be able to squeeze 400hp @ 90%.
09-07-2014, 08:16 AM
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Car: 87 IROC
Engine: L31 350
Transmission: T56
Axle/Gears: 4.10 D44
Re: 383 TPI
No. Any time you change injector size, the PROM needs programming. You would need it anyway, for changing up to the 383.
09-07-2014, 07:50 PM
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Re: 383 TPI
Before adding my supercharger, I was running bosch III 30lb injectors and they worked just fine.
09-07-2014, 09:24 PM
#6
Re: 383 TPI
I had 24lb LT1 (12ohm) injectors and the stock prom did NOT like them at all, because they were 12ohm. The stock prom in my car doesn't seem to mind the 15ohm (16ohm stock) Bosch IIIs that are in it now. I would think your motor needs to have 30+# injectors. Impedance is overlooked too often when not a supply concern.
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