
AFR gauge & O2 sensor
#1
Posted 05-25-2012 12:57 PM

I do have a Traqmate (but not the 'multi-input' block yet) so data logging isn't a must but would be nice to have in the future.
Innovate Motorsports has one for a couple Benjamins which is about what I was anticipating spending on it but wasn't certain if I could get away with a cheap-o unit just to get some AFR's during dyno sessions.
Thoughts/opinions/ideas?
TIA!
Brandon

#2
Posted 05-25-2012 02:23 PM

Dave
- Alberto likes this
Dave Wheeler
Advanced Autosports, the nations most complete Spec Miata shop
Author, Spec Miata Constructors Guide, version 1 and 2.0
Building Championship winning cars since 1995
4 time Central Division Spec Miata Champion car builder 2012-2013-2014-2017
Back to Back June Sprints Spec Miata 1-2 finishes 2016 and 2017
5 time June Sprints winner in Mazda's
6 Time Northern Conference Champion Car Builder
2014 SCCA Majors National point Champion car builder
2014 SCCA Runoffs winner, T4 (Bender)
2014 Central Division Champion, ITS (Wheeler)
2013 Thunderhill 25 hour winning crew chief
2007 June Sprints winner, (GT1, Mohrhauser)
Over 200 race wins and counting.
www.advanced-autosports.com
dave@advanced-autosports.com
608-313-1230





#3
Posted 05-25-2012 02:44 PM

+1 for what Dave said if you are just looking to do this for dyno runs, they'll have their own wideband that they'll clip to the end of your exhaust.
NASA Utah SM Director





#4
Posted 05-25-2012 07:47 PM



#5
Posted 05-25-2012 10:03 PM

My old Innovate LC-1 had longer cables to keep the important stuff cool and dry and allowed you to put a momentary switch in the circuit so you can do a recalibration in the drivers seat.
There are two variants of the MTX-L, one with a long cable (3844), and one with a short cable (3845). I ordered the long cable version (linked above) and can recalibrate from the cockpit. They all use the same Bosch O2 sensor (AFAIK). Don't even see the gauge while racing, so it doesn't distract me, but I bet you could just use the software to program the gauge green min to be > 22.4 and it'd never sweep.
NASA Utah SM Director





#6
Posted 05-29-2012 09:33 AM

Any dyno worth paying for should have a wideband set-up that connects directly to the dyno and can be graphed with the hp/torque readings.
Dave
Ah, I did forget this little tidbit - thanks Dave. Obviously w/a cat-installed vehicle getting the AFR BEFORE the catalyst is always a 'good thing' but since we run catless having the sniffer at the end of the tail pipe would suffice.
Regardless, sounds like the Innovative one might not be the one to get - AEM it is!

#7
Posted 05-29-2012 11:04 AM

But, I have got it and don't feel like changing it.
James York
sponsored by:
Stan's Auto Center, Lafayette LA
powered by:
East Street Racing, Memphis TN
2003 Spec Miata
#03

#8
Posted 05-29-2012 11:13 AM

#9
Posted 05-29-2012 02:25 PM

Not sure what value I'd get from it in the SM. Only time you really need it is for tuning as far as I can tell. I'm certainly not going to be looking at it during a race.
The PLX is also a good setup. I understand it is easier to install and less finicky with regards to grounding and such. The way it reads and translates the signal from the O2 sensor is different. There has been some in depth discussions on that topic on some forums. , their gauges are well integrated too.

#10
Posted 05-29-2012 05:23 PM

Not sure what value I'd get from it in the SM. Only time you really need it is for tuning as far as I can tell. I'm certainly not going to be looking at it during a race.
Air density changes with variances in air temp & humidity during the day. Only way to keep the AF ratio ideal is to change at the track.
I have the Innovate in my 1990 SM including the AFgauge mounted in the left corner of the OEM gauge area. Nothing to taking a look on a straightaway. To rich or to lean, make a slight rotation of the AFM. I have a fuel pressure regulator/gauge that isn't
installed at this time. When I do install, I'll continue looking at the AF on the straights & adjust the fuel pressure per some learning during Dyno runs. 1/8th turn to change AF ratio by X ammount, 1.4 turn & so on. When I go on track if it's to lean, that will be called paddock now.



#11
Posted 05-29-2012 05:27 PM

Air density changes with variances in air temp & humidity during the day. Only way to keep the AF ratio ideal is to change at the track.
I have the Innovate in my 1990 SM including the AFgauge mounted in the left corner of the OEM gauge area. Nothing to taking a look on a straightaway. To rich or to lean, make a slight rotation of the AFM. I have a fuel pressure regulator/gauge that isn't
installed at this time. When I do install, I'll continue looking at the AF on the straights & adjust the fuel pressure per some learning during Dyno runs. 1/8th turn to change AF ratio by X ammount, 1.4 turn & so on. When I go on track if it's to lean, that will be called paddock now.
David
Not sure you are aware.. I run the innovates as well, they stink

Your innovate WILL always read .4-.6 richer than the car actually is running. We have tested at least 10, all within that range even after calibrated multiple times. I fudge the scale on traqmate, but if looking at the gauge, keep that in mind. Compare to dyno.
We bought calibration gas for the dyno, it reads exactly 13.0, dyno sensor dead nuts 13.0, innovates all 12.4-12.6, everytime
East Street Auto Parts
Jim@Eaststreet.com
800 700 9080














#12
Posted 05-29-2012 05:40 PM

45 SM


#13
Posted 05-29-2012 06:01 PM


Because it's rich is most likely why I'm slow & have time to look while on the straights.




1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users