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Started by raueda1, 29 July 2022, 10:24 PM
Quote from: rumb on 31 July 2022, 01:40 PMPerhaps start considering sending the WUR and FD to CIS Flowtech for testing and calibration?
Quote from: Randys01 on 01 August 2022, 03:57 AMIt seems you are nearly there in terms of the correct values for everything except hot control pressure. You have to get that down. At 4000+ feet SLC has slightly less than the ave air pressure but at times it seems it is only by a gnat's whisker. Frankly, I feel as tho it is a red herring. There's a million cars a year go to 6000 feet in the Victorian snow fields and no one is in crisis. Indeed my own 6.9 travelled from sea level up to the mountain top every day for 10 years with a standard WUR.So forget Hi altitude WUR's .You have to get the control pressure down to 3.6 then let's see.
Quote from: s class on 06 August 2022, 02:06 PMDave,in any complex problem it pays to fix the known problems first before looking for more problems. I think you need to get that acceleration control pressure sorted first. I recondition warmup regulators and then set up the system on the car. In my experience you really want no less than 2.9 bar at acceleration. Warm control pressure with vac is a little bit more forgiving. All the good condition unmolested wurs I've seen seem to have been 3.5 bar from the factory, but anything up to 3.8 bar should be fine. As you point out the differential between readings with and without vac is crucial. Aim for 0.5 to 0.6 bar. Then set the exhaust gas CO correctly with vac applied. As I'm sure you realize, CO is set with vac applied, which means that if the differential between control pressures with and without vac is too great,you will be going too rich under acceleration.
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