Question for those who have a Air- Fuel-Ratio gauge on your ski ?

[gmoeller]

Idle = 12.5
2000rpm = 12.8
2500rpm = 13.5
3000 to 4000rpm = 14.0
4000 to 5000rpm = 13.8
5000 to 5500rpm = 13.7
6000 to 6500rpm = 13.4
6500 to 7000rpm = 13.2
7000rpm = 12.7
7500rpm = 12.3
8000rpm = 12.1
WOT = 11.8

I seem to be pretty close to this except at idle = 13.5.
Funny, I was recently going to ask if 13.5- 14 was too high at midrange RPM's.
Good thread.

For those that power up their AFR gauge separate from the engine, what does your reading "say" when the ski is "off". Is their a magic number that it's supposed to be? I believe (I can't remember for sure) mine says something like 21.7 (?).

[hitman]

Wow. I know the stock tune is rich but didn't know it was that rich. I've had my LC-1 for forever now and just haven't finished hooking it up. Can't wait to see what the A/F is across the board with my stock boost wheel and reflashed ECU.

[Duke]

I like running it lean at 12.2 at WOT but I don't recommend this. It's best to keep it safe at 11.7 to 11.9 if you're going to do any extended WOT.

Midrange cruising I'm in the high 13's and at idle I'm at 12.5

Have to agree with Jerry on this but must admit its hard to do with a reflash, Powershot and big wheel.

With more boost and the same compression etc., the more fuel you will need to cool the piston top. With a stock wheel I wouldn't hesitate to run in the 13s and thats where some stock SDs run.

Also when running the Dynotune gauge/LC1 setup for airfuel that you are recalibrating everytime out.

[5001craig]

I'm very close to Desperado's from memory but I don't have the ability to log. I would say I agree with Gary that idle is a bit higher at 13.5 or so. 11.8-12.0 at WOT.

Gary--I think mine reads 21.something also when the engine is off. I'll confirm this next time out.

Interesting point Duke about recalibrating--I've never done this with mine.

What I've always wondered is about the extreme lean numbers I see (very momentarily) when I give it a little bit of gas normally shortly after startup. I see 15+ for a very short time. I've just always thought it was some sort of phenomena.

My .02 is that a ski that is 10.x is too rich and needs to be leaned out.

[perk_1405]

My .02 is that a ski that is 10.x is too rich and needs to be leaned out.

i plan on getting that taken care of soon.

[desperado]

Craig..... lean reading after startup is because your combustion chambers are not at operating temperature and your ECU calibration does not compensate enough for this situation. Nothing to worry about if this is a momentarily situation which happens below 6,000rpm.

[2fast4u]

Have to agree with Jerry on this but must admit its hard to do with a reflash, Powershot and big wheel.

With more boost and the same compression etc., the more fuel you will need to cool the piston top. With a stock wheel I wouldn't hesitate to run in the 13s and thats where some stock SDs run.

Also when running the Dynotune gauge/LC1 setup for airfuel that you are recalibrating everytime out.

What is the eayest way to recalibrate the lc1? thanks Tommy Jordan

[Teerayoot]

recalibrate must be done in fresh air,
you might flow fresh air throght exthust pipe and recalibrate it.

[gmoeller]

I'm very close to Desperado's from memory but I don't have the ability to log. I would say I agree with Gary that idle is a bit higher at 13.5 or so. 11.8-12.0 at WOT.

Gary--I think mine reads 21.something also when the engine is off. I'll confirm this next time out.
Thanks Craig.

Interesting point Duke about recalibrating--I've never done this with mine.

What I've always wondered is about the extreme lean numbers I see (very momentarily) when I give it a little bit of gas normally shortly after startup. I see 15+ for a very short time. I've just always thought it was some sort of phenomena.

.

I see these same high numbers at start-up. And now that I think about it I believe idle while on the water actually comes down to 12.5 ish after it warms up (Its been awhile as I'm still healing). I was tinkering with the ski yesterday and was noticing 13.5-7 at idle so it was fresh in my mind when I commented on this number. I know it comes down after warm-up.

I'd like to know how to calibrate it too....

[5001craig]

Here's the link to the installation instructions from Dynotune and they state the calibration procedures:

http://www.dynotunenitrous.com/store...20WIDEBAND.pdf