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I am putting on my Trick Flow Street Heat Intake Manifold, with a 65 mm Throttle body and 24# injectors onto a car with the following mods:
95 GT AOD-E
3.73 Gears
Fuel Pressure Regulator
73 mm Mass Air
SVO shorty headers
Mac Two cat hi flow h-pipe
American thunder cat back
MAC CAI

My question is how much should i turn down the fuel pressurewith going up to the 24 lbs injectors? How do you know when your fuel pressure is correct? Are there tests for it? Please help ASAP as I am putting this stuff on in two days. Thanks in advance.
 

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I dont think that you need to adjust your FP with just an injector swap, the factory settings are 39-40 PSI and I think this would work fine. The only true way to know if the FP is helping you and not hindeing is to check with an A/F ratio gauge. Start with the factory settings and check it... if your running lean kick it up a few if your running fat kick it down. This can be tested most acurately on a dyno running a wideband O2 setup, then you will be able to see the actual ratio and how it runs across the full rpm range I believe a ratio of 12.8 is about were you want to be.
 
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