Overshooting boost target&limit ESL
Car is a v3 running ESL and Mafless.
I'm overshooting my target boost by a lot,currently it's set to 1.25bar and as i'm mafless the boost limit table is set to 1.40bar in the far column(1.012 baro in the look-up table) I thought with it set like this then my boost would cut at 1.40bar but i'm hitting the boost ceiling of 1.72bar. One thing i have noticed is on live data when logging is that the barometric pressure(LUT) window shows 1.012 as it should but barometric pressure(Bar) window shows 2.024 and it's a red figure. I know i can adjust my WGDC to get my boost closer to my target but i don't know why i'm overshooting my boost limit by such a long way ? Cheers Rich |
I've been looking over some settings and have found a difference in the map sensor perameters from what the stock 6s map that came with the ESL ecu and what the ESL manual says.
Boost gradient: 643 Boost offset:414 Baro gradient:54857 Baro offset:542 These are all the same in manual and what I have. The difference/conflicting info is: Baro SSM: 20572(ECU) and 12380(what the manual says) Baro SSM offset:52(same on both) I will try putting in the figure that it says in the manual to see if this is where my problem is,but if anyone with a 97/98 running ESL could check their baro SSM gradient is then I'd be most greatful :thumb: Just not sure if either the info in the manual is wrong,I have got the wrong prameters or if this figure would even effect boost cut? :wonder: |
All mine are same as the manual
Does boost target even do much my map that had done target and boost not even near same I just moved target closer to actual Boost Sure want duty set to run boost need so ecu not trying correct boost so much |
Thanks for the reply Jay,I've changed everything as per manual now but not had chance to really test it out,I don't like hitting 1.7+bar too often at the moment.
Looking at my boost gauge I'm still overshooting tho as I'm still hitting over 1.5bar before I back off the throttle. I know it's the WG duty which controls boost rather than the target so I will keep lowering duty until i can get it where I want. I'm just struggling to know why my set boost limit is not working to boost cut and is overshooting by so much? I thought it was there for safety measures? |
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Just tried mine with two different limits seems to limit 0.2 bar higher than what set at but not a smooth cut
just use duty on mine |
Nice one.
I will have a tweak of the duty and see how I get on :thumb: |
Have you changed the perameter in the baro SSM gradient to test Jay or is this how you have it? The figure in the manual says 12380 in that column.
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Just noticed one of the settings is different to manual was changed by mapper
Pic is how was set up and not changed any of those |
Ok thanks again for the advice,I have a 3 port bcs to fit which I'll probably do on Friday so I will have to redo the WG duty tables,the 3 port should also give better control.
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