Bottom Line = Wideband Sensor placement from Turbo

[MrFairlady]

My Downpipe had a bung already in it and its Right where/before the Flange to the Cat would bolt up is,..Almost like it was an 96+ S14 D/p.So I used that for my wideband for now.
Now What would that make my readings considering that its probably too far away from the turbo to be 100% accurate??
Lean - Rich?
I seem to be Running really lean,..noticed after install & Driving it up the road and at idle. and I mean in the 15's.pretty much Pegging out the gauge.

Running a AEM UEGO Wideband on my SR w/ Enthalpy Tune ECU: D/W 550cc,Z32Maf,GT2860,F/M etc etc I ALSO just put in BKRE7's (1 step colder Plugs today as well)

How far from the turbo is Supposed to be The best Accurate reading>?Just past the regular factory narrowband o2?

[HYPNOTIK]

What is it under WOT? 15's on part throttle is perfect, it's called good gas mileage. As far as placement just go by what the gauge manufacturer recommends. I've seen people put them in the test pipe and some people put them 1-2"s from the turbo, as long as you don't have an exhaust leak in front of the sensor I think it is perfectly fine both ways. Your sensor is probly good where it's at, that's where mine is.

This is from the instruction manual.
A weld-in M18 X 1.5 boss is supplied for sensor installation. Mount the O2 sensor in the exhaust system at least 18 inches downstream from the exhaust port. If you anticipate high EGT's (over 800C), run a turbocharger, run at high RPM for extended periods of time or plan on running leaded race fuel then you must mount the sensor at least 36 inches or more downstream of the exhaust port as all of these can cause the sensor to overheat. On turbocharged engines the UEGO sensor must be installed after the turbo charger, if not, the pressure differential will greatly effect the accuracy of the unit. For accurate readings, the sensor must be mounted before catalytic converters and/or auxiliary air pumps. To prevent collection of liquids between the sensor housing and sensor element during the cold start phase, the installation angle should be inclined at least 10° towards horizontal with the electrical connection upwards, see below.

[TheWolf]

Yeah it's fine where it is.. 18-36" from flange.

[MrFairlady]

Well,I've yet to Really GET on It.Thinking I'll do some damage.Just Partial Throttle Driving about 2 miles to my Parents house.

Tell me this,...The Car runs Fine w/ all the stuff I just put on-meaning the Z32 Maf was installed correctly Wiring wise obviously.

*If this ECU I bought "Used" from someone that has an Enthlpy Tune on it,...The car wouldn't RUN for SHit if the Z32MAF and 550's were on it w/ no tune CORRECT??
I never Cracked open the ECU to see if there was a Daughterboard on it and am Going off what he sold me.

trying to Figure if its factory ECU (62 redtop ECU) Casuings this or just How the ENTH Tune has set it up to run.

[TheWolf]

the car probably would have little to no chance for idling if you ran 550's instead of 370's.. and probably be in limp mode.

The safest place you could go is to put it on a dyno with a A/F gauge hooked up and do some baseline pulls. Street tuning is ghey

[MrFairlady]

Guess I need someone in the pass seat (untill I get my gauge closer to the steering wheel to see it good) Watching what it gets to when I Peg It!

Main question is if it were to far or close to the turbo would make readings Rich or lean.I believe Its Def is an Enthalpy Tune,otherwise I don't think it would Run as good or at all, as it is w/ whats on it right now.

Wonder if I should Bump Fuel Press Up just a tad?

Seems on my car I'm doing Multiple Things at once and then Diag is harder instead of 1 thing at a time.Its been the Story of this Build.

Thanks for the Help guys

[TheWolf]

at part throttle you run lean... at full throttle you run 12's... spend the $60 and throw it up on a dyno if your scared. they can shut it off and it will be on a calibrated wideband. You'll have a known quantity then.

[MrFairlady]

After Doing a run and Checking the Maps on the ECU....Thing is maxing out the MAP on a Z32 Maf.
It got down to 13's at WOT (around 10-11psi) for the one Punch that I did..though we're not entirely Sure the AEM wideband is Accurate.It is Brand new but so down the pipe that I guess it would read leaner.
Didn't Feel Very Quick for 10psi though.My old car felt the Same at Stock T25 boost.
Because runing 16.9's at idle...the damn car shouldn't even be running if that was true.
My Friend that Does Tunes and Tunes his RB'd S14 looked at it (and we were gonna extract data from the Chip but the CPU kept freezing up) and thought Something was def wrong w/ it Maxing out the MAP.

hmmmmm.Guess I need to take it apart and he's gonna check the Chip that way.