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JBL930 JBL930 is offline
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Join Date: May 2006
Location: UK
Posts: 1,172
Both pumps on my 930 are new, i don't know whether they would produce less as they get old? I changed them as a precaution! I'm told i will run WAY out of injector before i'd run out of fuel with my set up, but then the CIS system is a higher pressure system than the 993, i think i'd be ok with my stock pumps even up to 600bhp? My fuel pressure is set at 5.0bar, the CIS system pressure can be shimmed up to around 7.0bar at the fuel head. That's a thought actually DrJ, at 5.1bar you're only at 74psi, a lot of guys on here are up at (and above) 100psi

You can play with the shims in the fuel head, numbered 3 in this diagram

and get your system pressure cranked up!
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 01-18-2010, 07:50 AM
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