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Title: LAMFA changes on first tune Post by: Dave9n3 on February 15, 2016, 03:14:51 PM Hi,
I'm starting my first tune from virtually base file apart from 4 bar FPR fueling and also SAI and rear o2 deletes added. Attached is the screenshot of my now modified LAMFA table. I've looked at the stage 1 me7.5 tune for ideas and also read a sticky at the top of this page regarding dialling in fueling. Aiming for 12.4 AFR at peak torque and going for 11.6-11.8 AFR at redline. I have slowly increased this as RPM raises until i get to my final desired AFR at the redline. My LAMFA table looks different to others as it only uses 50, 60, 89.9, 95 and 100% for the pedal. Hence i have changed the rows for 89.9 onwards I'd appreciate some feedback on this table and also some advice on how I could improve it and or any other things I should change before I flash this file to the car and take some logs. TIA ;D Title: Re: LAMFA changes on first tune Post by: adam- on February 16, 2016, 12:51:05 AM Looks fine.
Title: Re: LAMFA changes on first tune Post by: Dave9n3 on February 16, 2016, 03:26:17 AM I've seen on the stage one project some changes were made to zklamfaw, is this something i should just look at once I've logged it with the lamfa changes. Tried to enrich slightly early in the hope that ill be rich enough by the time i hit peak torque.
Thanks once again Adam, i'll end up owing you a brewery never mind a pint. Title: Re: LAMFA changes on first tune Post by: adam- on February 16, 2016, 03:56:21 AM It just changes how quickly the new LAMFA is adopted. If you set it to low you'll find consumption sucks as you'll go over a bump and press the throttle a little and it'll enrich. It can be lowered if you feel you want fuel a little quicker (time quicker).
Monitor BTS too, you might find you get to like 5k and it just dumps fuel because BTS is high. Title: Re: LAMFA changes on first tune Post by: Dave9n3 on February 16, 2016, 06:06:27 AM I think ZKLAMFAW on my file is set very high as standard (unless I've defined it wrong) so not sure how it'll turn out.
I'll checksum this file and then try it on the car. Few logs of 3rd gear to redline and I'll see how it looks. Title: Re: LAMFA changes on first tune Post by: spacey3 on February 16, 2016, 08:36:58 AM It just changes how quickly the new LAMFA is adopted. If you set it to low you'll find consumption sucks as you'll go over a bump and press the throttle a little and it'll enrich. It can be lowered if you feel you want fuel a little quicker (time quicker). Just a quick one, I believe ZKLAMFAW works in the opposite way to you describe (i.e. it's not actually a time constant as the FR describes). I have mine set to 50 (up from 16.7) and find it works well. From another thread: The filter is basically: current value + ((|new value - current value|)*constant) I was way off before. Title: Re: LAMFA changes on first tune Post by: Dave9n3 on February 16, 2016, 09:48:57 AM My stock value for ZKLAMFAW is 13107.00
Not sure if this is right though it lined up properly with a 032HN ols file for my 032TL ecu so i guess its right. Seems very high though - any idea why this might be? Title: Re: LAMFA changes on first tune Post by: adam- on February 16, 2016, 10:02:33 AM The settings from the HN file you copied are likely wrong.
Title: Re: LAMFA changes on first tune Post by: phila_dot on February 16, 2016, 10:55:18 AM My stock value for ZKLAMFAW is 13107.00 Not sure if this is right though it lined up properly with a 032HN ols file for my 032TL ecu so i guess its right. Seems very high though - any idea why this might be? 13,107 is a typical value for ZKLAMFAW and equivalent to a 20% change per cycle. Not high at all. I use 0.0015259 conversion factor in my definitions. Title: Re: LAMFA changes on first tune Post by: adam- on February 16, 2016, 11:04:45 AM Interesting! Really good to know! :)
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