Quote:
Originally Posted by 504
So I've been using the v33 el e85 tune on a stock 86 running eflex and I can confirm that I have been getting the slightest drop in fblk/flck (-0.6--0.75 once every 30 min driving session) under light load 3k rpm and heavy load 7400rpm. V44 should be good for this.
One issue I have been experiencing with v33 is somewhat erratic ltft staying at 6% on idle and hardly dropping from there. It goes up to 8% sometimes but under driving conditions it does drop to between -2-4%. So I take it from previous posts the original oft maf scale is best for stock airbox running a bigger range of ethanol concentrations? Would Steve/waynos o2 sensor scaling have something to do with this also? These are the main changes I see on v33 that could contribute to higher fuel trims
edit: I also tend to run rich under open loop reaching 10.5 AFR, I assume this comes part of universal tunes right?
Thanks in advance
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How are you measuring the 10.5 afr ? stock o2 scaling in oft tujes only goes to 11.25.
yes the ol maf scaling used in the standard oft tune make most cars run quite rich in open loop i gather its a safety thing, but since i only use united e85 i dont need it.
however i tested my tune a couple of weeks ago by running it down to fuel light so about 8 litres of e85 left then put in 12 litres of petrol, ran rich for a bit till fuel trims adjusted, no knock, drove it for 100 km or so no dramas, filled up with e85 again ran a bit lean did get some knock about -2 and iam drop to 0.7, till fuel trims sorted again then no dramas, i have increased the amount of knock correction timing in the knock correction max A table so the iam is verry agressive in countering knock though. running same overall timing though.