Fuel pressure @50 wot
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I would think 50 psi is OK. Mine was dropping into the hi 30s & the injectors were still keeping up (but I have 60lb Motrons). You need to log your inj duty cycle @ WOT to make sure it's OK. And then compare the numbers to the link in the sticky on the PCM tuning forum. As long as you aren't exceeding 85% you are fine. (less than 15-16mS) Also look at your LTFTs & your O2s (a/f) as they will tell you if the PCM is adjusting properly.
IF you do find a problem, you can get the p-n-p harness & add a Boost-a-pump, or get a regulator.
IF you do find a problem, you can get the p-n-p harness & add a Boost-a-pump, or get a regulator.