Open Loop tuning
04-04-2006, 03:34 PM
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Open Loop tuning How lean can I safely go during cruise? I'm trying to tweak my Open loop table for better mileage but don't want to melt a piston in the process.
Once I get set into OL permanently, is there anything else I should be looking at tweaking?
Also,
While looking at a log from yesterday I noticed something weird. Why does it look like my O2 sensors are turning back on for short periods and causing my AFR to go back to stoich? Seems to happens usually around idle or parked.
While in gear at a stop light, my AFR will drop down to about 13.7-14.
I couldn't get my log to post here, so heres a link to where its at.
http://hptuners.com/forum/showthread...5234#post35234
Once I get set into OL permanently, is there anything else I should be looking at tweaking?
Also,
While looking at a log from yesterday I noticed something weird. Why does it look like my O2 sensors are turning back on for short periods and causing my AFR to go back to stoich? Seems to happens usually around idle or parked.
While in gear at a stop light, my AFR will drop down to about 13.7-14.
I couldn't get my log to post here, so heres a link to where its at.
http://hptuners.com/forum/showthread...5234#post35234
04-04-2006, 04:53 PM
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I run 16:1 under 30kpa (idle) and 15.4 up to 70kpa.
Lean cruise can even command 17:1 or leaner! So I think you will be ok.
Just make sure you log KR and keep an eye on temp.
Also I wouldnt run lean over 70kpa.
Lean cruise can even command 17:1 or leaner! So I think you will be ok.
Just make sure you log KR and keep an eye on temp.
Also I wouldnt run lean over 70kpa.
04-04-2006, 09:11 PM
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Originally Posted by ringram
I run 16:1 under 30kpa (idle) and 15.4 up to 70kpa.
Lean cruise can even command 17:1 or leaner! So I think you will be ok.
Just make sure you log KR and keep an eye on temp.
Also I wouldnt run lean over 70kpa.
Lean cruise can even command 17:1 or leaner! So I think you will be ok.
Just make sure you log KR and keep an eye on temp.
Also I wouldnt run lean over 70kpa.
When you say keep an eye on temp, are you talking about the engine coolant and exhaust temp?
I've actually noticed my engine coolant temp has gone down a little since running OL.
Is that normal?
04-04-2006, 09:12 PM
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Originally Posted by linegtdt52
you should probably research the thresholds of your engine from a qualified tuning facility and go from there...hell who knows best
Not too many places around here do OL tuning and none are definatly close.
04-06-2006, 10:52 AM
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Originally Posted by Zick
Also,
While looking at a log from yesterday I noticed something weird. Why does it look like my O2 sensors are turning back on for short periods and causing my AFR to go back to stoich? Seems to happens usually around idle or parked.
While in gear at a stop light, my AFR will drop down to about 13.7-14.
While looking at a log from yesterday I noticed something weird. Why does it look like my O2 sensors are turning back on for short periods and causing my AFR to go back to stoich? Seems to happens usually around idle or parked.
While in gear at a stop light, my AFR will drop down to about 13.7-14.
^ttt^