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Daniel Bailey

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Posts posted by Daniel Bailey

  3. E85 sensor

    in Link G4

    Posted

    I found that with even up to E75-E80 areas that there didn't really need to be any difference in cranking enrichment for  starts above 50degC ECT, the 10deg (I had to get the S14 starting nicely in winter) up to 30degrees... particularly on first start were the more challenging ones and the cold starting didn't really start taking more cranks until we started getting up to 50% or so from memory.   It would also often start a lot better the second time even at 40degC even on higher ethanol blends so it can be a bit misleading when nutting that out.

  8. E85 sensor

    in Link G4

    Posted

    ^ Terrible English there, and no way to edit.  Base map was initially for straight petrol, I scaled it up by around 20% and my 4D fuel tables have -20 for 0% ethanol... and everything else scaled to suit.  

    Works very well, though it'd be nice if there was a way to have a way of trimming crank enrichment for ethanol percentage as well.  I've done a rangi-work around (I'm actually using 4 and 5d fuel adjustment) and tried offsetting 0-400rpm with the theory that say 15% enrichment at 0-400rpm on 85% eth will effectively create a makeshift crank enrichment trim, and a 0% enrichment from 400-1000rpm should stop interpolation from messing with idle mixtures... and just hope rpm never dip under 500rpm after the car has started.  

  9. E85 sensor

    in Link G4

    Posted

    Hi Scott,

    Thanks for that - I had already got it all running fine, I rescaled the base fuel map to suit having adjustment required in the 4d table for 40-50% ethanol and then negative trimmed the same amount for 0% and adjusted the rest of the table to suit... it worked out fine, but wasn't pretty and would obviously be nicer to just have bigger trim limits :)

    Cheers,

    Dan

  15. E85 sensor

    in Link G4

    Posted

    Cheers - I will check out setting ethanol content as an axis tonight, for some reason I thought I had tried that and was either not able to change the axis setup setup - or couldn't select ethanol % as an option though could have missed that.

    I did see I could span the boost target table based on ethanol content, though I tend to try and get the wastegate duty cycle table optimised for the boost target I am aiming for - and if I span target based on ethanol content, have the wastegate table optimised for 18psi (for pump gas) and have E85 in the tank, and have the boost target for E85 set as 30psi then the closed loop boost control could have fun with that. 

    Thanks for the input, I thought I'd check before I set too much - will try it out this weekend.

    Dan

     

     

     

     

     

  16. E85 sensor

    in Link G4

    Posted

    I'm well familiar with that thread ;)  Good to hear the car is trucking on nicely with it, sensor been reliable?

    So does anyone have any thoughts or advice on map limit switching based on ethanol content?  As a fail safe it'd be nice to have the ECU cut the fun if someone tries to run a boost level only intended for higher ethanol contents when there is a low ethanol mix going through the rail....

  18. E85 sensor

    in Link G4

    Posted

    Hi, I'm trying to nut out a way of making boost control (switch tables and, or at least MAP limits) based on ethanol content.   I had looked at switching MAP limits using the virtual aux configured to switch if ethanol percentage is over a particular threshold, however ethanol % isn't in the drop down list (could this be a wishlist item?). 

    The ethanol %age can of course be used as an axis in the boost target table, but it'd be nice to have a tailored WG duty cycle table to suit as having the same WG duty table for both a 18psi target (straight petrol) and a 30psi target (for 30%+ ethanol) may not be optimal... and of course have the MAP limit set to suit.

    Any input would be appreciated :)


    Dan

  20. E85 sensor

    in Link G4

    Posted

    OK, cheers... thats what I was wondering - so the adjustments are basically just to scale the entire ignition and fuel maps to match the ethanol blend? 

    So hypothetically speaking (just plucking numbers off the top of my head) if you tuned the base map on straight 98, then set up an overlay for eth blends you could end up with a +35% fuel trim to the entire fuel table if E85 is in the tank, and the same kind of thing with ignition?   

    The reason I ask are for 'curly' situations,  such as where the shape of the base ignition tables may be influenced by the knock limitation of petrol, while on E85 the same car may be able to be mapped to MBT under the same conditions.  Makes sense if there are compromises to make one size fit all, but I like to ask just in case this kind of thing has been covered and I've missed it :)

    Cheers

  21. E85 sensor

    in Link G4

    Posted

    Just to bump this one up again, I've so far seen people only mentioning a single overlay table for ethanol content correction (presumably each for ignition and fuel) - what axis configuration do you guys use, or envisage for a flexifuel tune setup?

  23. Data logging

    in WishList

    Posted

    I thought most PDAs USB port is only set up to be a client, or have they got quite a bit flasher these days and able to act as a host?? If they are only a client, that makes it pretty much impossible and I doubt the Link is going to play host :) Blue tooth would be quite a neat function to add to the Link, has something like that been considered? If you are willing to share the serial protocol I would be very interested in having a look at it, and perhaps playing around with putting together a way of datalogging without having to lug around a laptop/something like that. My EMail address is lith at clear dot net dot nz. Cheers.

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