17 replies to this topic

[bjerrang]

Anyone have a picture where you have fitted the sensor "dongle" mounting on the mcx exhaust.
Here is my idea where to install it , can anyone pin-point more exactly. So it don't interfere with the frame

[wileo]

Looks like there is already a bung welded in just after the turbo

[KelvinC]

I Can also see that. It just after The turbo. And where you want to Mount it is too close to The manifold. The sensors life Will be short if you put it there.


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[bjerrang]

I Can also see that. It just after The turbo. And where you want to Mount it is too close to The manifold. The sensors life Will be short if you put it there.


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Its a picture from mcx, but where do you guys put it in

[KelvinC]

After The turbo.



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[bjerrang]

After The turbo. ---
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Good picture thanks.

also found some info in a pdf fra innovate

[KelvinC]

:-)
Good luck :-) AFR is a must on a boosted sled. Imo.


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[Rotax_Kid]

I've been running my MCX kit with the O2 sensor in the bung after the turbo.

[niksun]

what are the numbers on AFR on mcx 180? and psi on see level?

[68gmc]

what are the numbers on AFR on mcx 180? and psi on see level?

High 10's to Low 11's at 6PSI at sea level and at wide open throttle. Make sure your EFI box has the latest map from MCX as some were shipped with lean programming last year. Hope this helps...

[bjerrang]

I have the latest map and its to rich. I have modified the mcx ecu mapping to 12.5 wot.
In the old mapping i could noy get under 2 liters per 10km

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[wileo]

12.5 while making boost???? That's to lean

2L for 10km isn't that bad that's 200km ish for a tank

[68gmc]

I have the latest map and its to rich. I have modified the mcx ecu mapping to 12.5 wot.
In the old mapping i could noy get under 2 liters per 10km

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If you are running 12.5 afr at WOT at 6 pounds of boost at sea level on pump fuel you are too LEAN!!! MCX's "XXX rich" mapping from last year can be leaned out for low load conditions and in the absence of boost but at WOT you need more fuel!

[bjerrang]

10 to 11 is to rich. Mine is from 11.5 to 12 @ wot and 12.5 at peaks. The mapping is mostly changed at 5-6000 rpm. I have a own thread about this. I was up in 2.3 liters in light terrain only long running with a shorty with the new mcx map. Now im on 1.9liters @ 10km.

http://www.dootalk.c...-AFR-1200-Turbo

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[68gmc]

10 to 11 is to rich. Mine is from 11.5 to 12 @ wot and 12.5 at peaks. The mapping is mostly changed at 5-6000 rpm. I have a own thread about this. I was up in 2.3 liters in light terrain only long running with a shorty with the new mcx map. Now im on 1.9liters @ 10km.

http://www.dootalk.c...-AFR-1200-Turbo

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"Ok, back to the topic... there is no reason why a properly tuned 1200 turbocharged Doo could not be very safely tuned to 14,2-14,4 low load cruise AFR, 13.6-13.9 normal cruise afr, 13.0-13,3 high load AFR and 12.3 WOT AFR. If in doubt about the timing curve versus the fuel octane and boost load..... then enrich one full point from the above figures. If you really do not know what you're doing and you're very concerned about your tune not being right, then enrich 2 full points."

The above quote from Desperado said it best, the MCX does not adjust timing from stock so the 180 kit would fall in the category of having a questionable timing curve for boost so "enrich one full point" from the 12.3 WOT which would yield 11.3 WOT afr. I would take his advise!!!