I am trying to tune my lude and was wondering where my fuel pressure should be at idle and at WOT with 6 to 8 lbs of boost. I am using a Walbro fuel pump and a Cartech FMU. I think that my pressure is at 40psi at idle which is fine, but I have yet to play with the FMU. Also, I am running colder plugs (NGK ZFR7F-11)...where are you all gapping them? .035? Any advice would be helpful.

 

Your idle pressure sounds ok, and the plugs are correct. I gap mine at .032-.033 with luck. I am not using a RRR, so I cannot help with the dynamic fuel pressure.

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