Hay All.

I have a question for anybody running a fuel pressure reg on there H23 prelude.
I have a 92 Si with a malpassi FPR on it, now Im currently running 40psi however at time I have run 45psi which I do find a small increase of power. Id like to know what you guys normally run your Fuel pressure at. on my reg if I go to 35psi I found when revving when the tacho drops back down it almost stalls and then revs back up to about 600-1000rpm. the car is automatic but I doubt that it makes a difference if it was auto or manual when in park or neutral when revving?

anyways hopefully I get a reply? is 40/45psi to high or does it depend on the regulator?

Thanks all

 

Set it at 45, dont forget to disconnect and plug the vaccum from the regulator when you set the pressure.