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WinRice WinRice is offline
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Join Date: Jun 2005
Location: Colorado
Posts: 692
If you're still running CIS there aren't too many pumps that can maintain the volume required at the 100+ psi pressure used by CIS. The main reason Porsche went with two pumps in series.

The stock system is actually pretty good, you just need to track down the problem. Could be plugged lines, plugged strainer in the tank, plugged filter, bad pumps, or even bad wiring and relays that don't let the pumps get the current they need.
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1986 911 Turbo
3.3L, K27HFS, Tial 46mm, TurboKraft Intercooler, 964 Cams, Monty Muffler, MS3 w/MS3X, M&W Ignition, Zietronix WBO2 Data Logger, Wevo shifter, coupler and motor mounts.
Old 06-20-2011, 11:24 AM
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