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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,229
Garage
Well I tried setting my pressures to the specs above and noticed a few odd things:
1) The system pressure initially was only 5.7Bar, so I needed a few shims to get it set at 6.5-6.7Bar where I am at now. It oscillates slowly between the 2 pressures, even though I have a battery charger hooked up to insure full load to the pumps. Before changing system pressure at 5.7Bar the car shut off instantly when I shut off the ignition key. Now at the increased pressure the car runs for 1 second after the key is turned off! Not dieseling but actually running for a second. The engine stops before the ignition delay relay shuts down though which usuall lasts for about 3-5 seconds or so.
ANY IDEAS ON THIS?
2) My cold control pressure at 85 degrees F ambient was 1.8Bar and Warm control pressure was steady at 3.7Bar. With this Warm control pressure I was seeing 14.3 to 1 AF ratio at idle and at light cruise 15.0-15.2 which is too high. Still trying to gather data under boost since I don't have my Innovate gage XD-16 working yet to monitor while driving under boost.
Is this 15 to 1 something to really worry about under light cruise load?
3) I have my Water/meth kit set to start at 3psi boost and it is working fine and I notice no bogging or ill effects to the engine when it comes on. I WOULD LIKE TO GET REAL AF RATIOS UNDER BOOST IWTH AND WTHOUT THIS ON TO COMPARE ITS EFFECTS AS WELL.
Question: How to lower the warm control pressure on the WUR?.... as I dont think driving down the cold control plug on the top of the WUR is the answer. This effects cold control pressure which is fine right now.
Fred
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 07-11-2011, 10:42 AM
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