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Hi guys, i cant seem to find direct answers to these two questions: (re RB25DET in R33 GTST)

1. when on idle, what is you vacuum reading in the manifold? i just was to get some comparisons in relation to mine...please also state ios you are running stock gear or any mods that might effect this reading

2. if i upgrade my fuel pump and keep the stock FPR, will the pressure in the rail rise from standard at all?

i have some interesting reading in this link...just wondering your thoughts?

http://www.240sxforums.com/forums/rb-engin...stable-fpr.html

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https://www.sau.com.au/forums/topic/291487-two-tech-questions-please/
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1. approx -525mmHg (negative 10.2 psi), dead stock rb26.. rb25 wouldn't be much different I would guess

2. FPR regulates the pressure, pressure will neither drop or raise with the new pump.

Adjustable FPR's are evil, and should only be used to squeeze an extra ~10kw out of already maxed out injectors, it's best to stick to the stock pressure otherwise the spray pattern is messed up.

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