NZSpokes

Just been thinking of trying to find a pair of small O2 gauges to be able to see what is going on with the carb setup.

Any recommendations for a set up?

Seem to be some cheap ones on Ebay.

kenmoore

I too am looking for ways to see what is happening with my engine .

I am thinking of a vacuum gauge like in the old days!

They can give you a lot of info about what is going on with your engine.

E.Marquez

Zt-2 wideband :
Zeitronix Zt-2 : SEMA Award Winning Wideband Engine Datalogging System
with Black Box Logger works great on bikes:
Award Winning Zeitronix Black Box Data Logger : Zt-2 and Zt-3 Data Logging

A single O2 gives you 99% of data. If you wish to monitor two O2s then you can feed a Zt-3 controller into the Zt-2:
Zeitronix Dual Channel AFR Setup using the Black Box Data Logger

More info here:
Zeitronix Dual Channel AFR Overview

OR

Universal Digital Tuning Products and Tuning Tools from Innovate Motorsports

smokinjoe73

Wow, this forum just took a step forward into the universe. Looks like I am not the only one who devotes much brainpower into thinking of ways to tweak things.

Kinda one step closer to dyno tuning. I want to see someones home dynamometer using a 55 gallon drum filled with concrete or something.

Hopefully this benefits us all in the Hawk brotherhood.

sailorjerry

My thoughts on this subject drew me away from o2 sensors and more toward EGT sensors (Exhaust Gas Temp).


Reason being, the simplicity of average Joe being able to drill hole for an EGT and mount a gauge is over whelming.


Not to mention you can learn just as much if not more from proper exhaust temp readings than you can from o2 reading especially once getting more into full engine builds and such.


Just my thoughts thought.

smokinjoe73

What? Hey I didnt even screw anything up yet!

xeris

Good point. Reason why light aircraft have EGT as part of the instrumentation.

E.Marquez

EGT on a plane is a different animal.. That powertrain is a specific engineered design, it has no allowance for modification, it must be able to adjust AFR over a wide range, but has no need for very specific AFR.

EGT is not fast reading
EGT is affected by more than just the amount of fuel in the air being combusted.
EGT would need to be tracked along with AFR, logged and matched for a specific setup of an engine, only then could you use EGT alone to "know" what is going on with your atomized and combusted fuel.

To install a EGT sensor on a thin wall exhaust tube requires the same type bung welded in as a OT sensor if you want a long lived, leak free install.

AFR is more usable to tune with than EGT alone.
AFR alone has only limited use.
AFR and RPM data logging is more useable data for tuning than EGT alone.

AFR, EGT and RPM data logging makes for a nice tuning set... But you still need them AND a dyno and a flow bench if your serious about building at the high end.

EGT, AFR, either is worlds better then screw driver alone tuning of a carb.