|
grateful user
Join Date: Mar 2008
Location: collierville tn
Posts: 1,336
|
craig, your freq. valve does more than correct your mix below the 35 degree switch, when you go past the switch, the 02 goes into open loop, and your F/V goes to a 90 percent duty cycle to richen the mix by lowering press. in your lower chambers of you fuel dist. You should never dissable your 02 system by pulling the relay, as it make the F/V inop, and then you will be in a lean situation at WOT. On setting basline afr, it gets tricky with a wur that is not calibrated perfectly, as i have discovered. spec is 50-55 lbs of warm press. on your car, when playing with my manual adjutable wur, i noticed that 50 gives me 13.9 to1 (with the 02 unpluged) and 55 gives me 15.5. the 02 job is to correct to 14.7 to one at all times regardless if you are 50 or 55. with it unplugged, this is not going to happen.
__________________
fully disassembled, blasted, customized and restored 75 targa with factory hard top, 993 style turbo ft fenders, steel flares, C2 bumpers and rockers, 82 3.0 sc 9.5/1 engine with PMS flywheel, 964 cams, flowed heads, ssi's short geared 915 w/lsd, polybronze, bilstein,working lambda, modified and highly tuned cis, tensioners, pop valve, backdated exhaust and heater, 2300 lbs. no bolt left untouched. 1970 911E. Nice car but needs a re-do.
Last edited by don gilbert; 12-25-2010 at 06:14 AM..
|