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E85 L67 fuel economy
Posted: Mon Feb 19, 2018 8:12 pm
by dusto
ok so got the ute going pretty well got the AFR with in 3% of commanded generally
also got my dash working all properly with the trip computer, wish i didnt this thing suck the juice, im getting around 23l/100 if i baby it and if i give it a bit of a squirt yo can just about watch the gauge go down, im aiming for 7.8 WOT im running the "12psi" pulley,
does this seem about normal ? ive got a tonner and its about a 60l fill from empty so its a real pain in the arse
Re: E85 L67 fuel economy
Posted: Mon Feb 19, 2018 8:54 pm
by The1
E85 will be about 30% more than PULP. If your wideband is reading "AFR" this will be tuned for PULP, so tune it for 11.8 same as you would for PULP but it will really be 7.8 for E85. If you want to use reading that matches then you need a gauge that works on Lambda
Re: E85 L67 fuel economy
Posted: Mon Feb 19, 2018 10:13 pm
by dusto
yeah thats what ive got targeted at wot and higher loads and then i have 15 for the cruise
Re: E85 L67 fuel economy
Posted: Tue Feb 20, 2018 5:42 pm
by Charlescrown
Your cruise air/fuel ratio should be 9.8 for stoich. I think your running way too lean.
Re: E85 L67 fuel economy
Posted: Tue Feb 20, 2018 6:11 pm
by vlad01
yep, that's for sure. For lean cruise you want to be around 10-10.5, stoich as mentioned above 9.8
Re: E85 L67 fuel economy
Posted: Wed Feb 21, 2018 12:17 am
by dusto
sorry that was the petrol reading, i think ive got 10.5 commanded,
Re: E85 L67 fuel economy
Posted: Wed Feb 21, 2018 12:19 am
by dusto
ill up load a log tomorrow
Re: E85 L67 fuel economy
Posted: Wed Feb 21, 2018 12:20 pm
by Charlescrown
Re: E85 L67 fuel economy
Posted: Wed Feb 21, 2018 4:11 pm
by dusto
ok I've attached a log and my bin with the xdf that i have my wbo2 cal set for e85 AFRs
WBO2 is a innovate lc-1. in the bin i have changed all commanded AFR to suit the e85,
i like how the car is performing but this fuel situation is a bit crazy, i suspect my ute is a few hundred kilo heavier then a standard tonner due to a heavy duty steel tray a previous owner thought would be good. just normal city driving i get about 27l/100 and on the highway it sits around the 20l fuel used over a tank is always with in a couple of liters either way, so trip comp is accurate
would some one be able to have a look over, im not sure the WBo2 formula is 100%
Re: E85 L67 fuel economy
Posted: Wed Feb 21, 2018 4:13 pm
by dusto
im a bit lost on where i should be looking as far as ignition timing goes, ill get it on a dyno soon to get MBT figured out etc