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FYI - 95 LT1s used 24lb@43psi injectors.
Most of the injector places that I've looked into use 43psi as the rating standard for injectors, i.e., regardless of what actual pressure you're using, the injectors will be rated at, generally, 43psi, then you have to do the conversion to figure out what flow they will have at your operating pressure.
Our pressure is 48+psi, the LS1s operate a few psi higher. And, no, we can't use the LS1 fpr, they use a different pressure regulation system.
Our PCMs have a +/- 20% learning curve for long term fuel trims. I have my MAF screen removed, Whisper Lid, Holley powershot filter, stock exhaust except for a Flowmaster 80 and WS6 tailpipes, and my PCM is consistently running at 5%-8% (adding fuel). So, the PCM (for 99+ 3.8s) should be able to easily handle 24lb injectors, and I'm sure 96-98 3.8s could probably also handle them.
The rule of thumb that I have seen is a 20% increase is injector flow rate is what the PCM should generally be able to handle without reprogramming.
Most of the injector places that I've looked into use 43psi as the rating standard for injectors, i.e., regardless of what actual pressure you're using, the injectors will be rated at, generally, 43psi, then you have to do the conversion to figure out what flow they will have at your operating pressure.
Our pressure is 48+psi, the LS1s operate a few psi higher. And, no, we can't use the LS1 fpr, they use a different pressure regulation system.
Our PCMs have a +/- 20% learning curve for long term fuel trims. I have my MAF screen removed, Whisper Lid, Holley powershot filter, stock exhaust except for a Flowmaster 80 and WS6 tailpipes, and my PCM is consistently running at 5%-8% (adding fuel). So, the PCM (for 99+ 3.8s) should be able to easily handle 24lb injectors, and I'm sure 96-98 3.8s could probably also handle them.
The rule of thumb that I have seen is a 20% increase is injector flow rate is what the PCM should generally be able to handle without reprogramming.
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