My Dad got me an LM2 wideband setup for my birthday last night. Its actually for my Barracuda but while the machine shop is holding the block hostage I figured I could fool with the LM2 on my Jeep.
My jeep is a 97 XJ with a budget 4.6 that has about 40K miles on it. Its got a Crane 753901 Cam and ford motorsport 24lb injectors, stock header, stock S pipe, after the S its 2.5" through a 2 chamber flomaster and out the back. Typical budget stroker combo for crank etc. I welded the O2 bung in just after the crossmember. The Jeep sits at about 4500lbs, 5.5 lift, 4.56 gears, locked both ends, aftermarket bumpers, tire carrier, 35" tires, sliders, tools, misc spare parts(was not trail ready). Actually with a driver and passenger it was probably sitting at about 5000lbs. I am mentioning this incase your wonderign why its so damn slow on the log below lol.
I was actually really surprised how good the air fuel ratio was, its 15:1ish cruising and at idle and averaged mid 12s wide open. I used the OBDII port to log RPM. Take in mind that today it was 106* on the overhead console. I was concerned that it would be a little lean as I get some spart knock now and then but now I know thats purely octane related most likely.
Here is the log, I started the log as I was turning around, the actual run goes between the two notepads on the bottom of the screen. Since I just got this stuff last night a screenshot was the only way I could think to post this.
I am curious what the WOT numbers will be like when the air is cooler, I imagine it would lean it out some since the ecu doesn't read the 02@WOT.
Anyways, i thought I would share. I would say I don't need a map adjuster.
My jeep is a 97 XJ with a budget 4.6 that has about 40K miles on it. Its got a Crane 753901 Cam and ford motorsport 24lb injectors, stock header, stock S pipe, after the S its 2.5" through a 2 chamber flomaster and out the back. Typical budget stroker combo for crank etc. I welded the O2 bung in just after the crossmember. The Jeep sits at about 4500lbs, 5.5 lift, 4.56 gears, locked both ends, aftermarket bumpers, tire carrier, 35" tires, sliders, tools, misc spare parts(was not trail ready). Actually with a driver and passenger it was probably sitting at about 5000lbs. I am mentioning this incase your wonderign why its so damn slow on the log below lol.
I was actually really surprised how good the air fuel ratio was, its 15:1ish cruising and at idle and averaged mid 12s wide open. I used the OBDII port to log RPM. Take in mind that today it was 106* on the overhead console. I was concerned that it would be a little lean as I get some spart knock now and then but now I know thats purely octane related most likely.
Here is the log, I started the log as I was turning around, the actual run goes between the two notepads on the bottom of the screen. Since I just got this stuff last night a screenshot was the only way I could think to post this.
I am curious what the WOT numbers will be like when the air is cooler, I imagine it would lean it out some since the ecu doesn't read the 02@WOT.
Anyways, i thought I would share. I would say I don't need a map adjuster.