C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Injector constant

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Old Jun 26, 2002 | 02:27 PM
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Hendej
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Default Injector constant

Long story short - changed to FMS 24# injectors, BLMs now all 108.
No AFPR, want to do it all in the PROM, but I see two injector constants - double fire and single fire. One is twice the other. What now?

Does this seem right?

1. Calculate the new constant a few #/hr higher, say 26#
2. Divide 10158.8 by 26 to get the new prom value of 391 (was 441 for the stock GM 23# injectors)
3. Put this value in the Single Fire location using Winbin
4. Double it and put that value in the Double Fire Location
5. Observe change in BLM's using scanner

Is that about it? (The prom is stock '86)
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Old Jun 27, 2002 | 12:45 PM
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Default Re: Injector constant (Hendej)

I would set both constants to 26#. I did that when I was running 24# with the 165 and seemed to work fine.
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Old Jun 30, 2002 | 09:18 AM
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Default Re: Injector constant (-=Jeff=-)

I will agree with Jeff. Change both single and double to the same Constant.
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