#72347, "Wideband o2 logs of my old S-FMU setup." Jun-08-04 03:58 AM by dougie2
I just thought you guys might like to see some wideband graphs. I was clearly running pig rich and this was with an S-FMU and Cobra 400cc injectors with a Super 20G. I recorded them right before I started the Accel DFI install. I have black soot covering my rear bumper from running this rich. Leaning it out definitely would have helped power output and idle quality.
#72354, "RE: Wideband o2 logs of my old S-FMU setup." In response to Reply # 1
The strange thing is that my average A/F ratio was 11.7 with the T3 turbo setup I used to run. I put on a S20G and 3" exhaust and the A/F ratio dropped to 10.3 without changing the S-FMU settings. Interesting indeed.
#72375, "RE: Wideband o2 logs of my old S-FMU setup." In response to Reply # 4
Yeah before i got my AEM wideband, i was around the same A/F ratio, then got some good power gained just by going to 11.0:1. I know a lot of people suggest to run around 11.5:1, but i'll be dammed as the motor loves the fuel..Plugs look a darker tan color, and 15psi feels great on the S16G. EGT's are a bit high on a very long pull, around 1575-1580, but really thats pretty optimum when you are making most power. IMO, i wouldn't call 10.3:1 pig rich, but its def on the rich side of where you need to be at. Until i get on the dyno, i'm keeping my fuel at 11.0:1.
13.5 @108 MPH-2.2 60ft(stupid FWD!) S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential fuel injection) My webpage: http://eclipsed4evr.home.comcast.net -1998 Mitsubishi Eclipse RS-T- "Toy" -1992 Plymouth Laser Turbo AWD(SOLD) -2000 Honda CR-V(daily)
#72382, "RE: Wideband o2 logs of my old S-FMU setup." In response to Reply # 6 Jun-08-04 04:12 PM by XtremeRS
Originally posted by turbo8u hey matt how much timing does your car pull at WOT?
Once i hit WOT, starts at 17, quickly drops to around 13, then steadily increases to a max of 20 degrees at around 5700 rpm up to 6125..not sure after that since i didnt log it farther..it may go down, or it may go up from there to redline.not sure though. Why do you ask? Just curious
13.5 @108 MPH-2.2 60ft(stupid FWD!) S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential fuel injection) My webpage: http://eclipsed4evr.home.comcast.net -1998 Mitsubishi Eclipse RS-T- "Toy" -1992 Plymouth Laser Turbo AWD(SOLD) -2000 Honda CR-V(daily)
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