Bethanyc Posted September 28, 2020 Report Share Posted September 28, 2020 Hi Link team, finally got a proper speed full forest test in and looking for suggestions on boost settings on closed loop, looks like still overrunning by 10-15 Kpa, Turbo has a very aggressive spool and will hit peak boost at 3500rpm. Its not knocking when overboosting from what i can tell but would still like to get at the 250kpa more constantly. Thanks. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 28, 2020 Report Share Posted September 28, 2020 Can you attach the log. Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted September 28, 2020 Author Report Share Posted September 28, 2020 sorry Logs attached to first post. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 28, 2020 Report Share Posted September 28, 2020 You really need to do a PC log so all the relevant paramaters are logged. Cant really tell you anything from that. It doesnt look like there is much closed loop action going on so possibly needs more derivative. Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted September 28, 2020 Author Report Share Posted September 28, 2020 Thanks Adam, was fine on dyno , and it's its a bit hard to drive a rally stage with a laptop in the car, if there is something you recommend for logging to ecu to be turned on ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 28, 2020 Report Share Posted September 28, 2020 Yep, add the boost parameters below as well as percentage Fcut and percentage Icut. Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted October 1, 2020 Author Report Share Posted October 1, 2020 Thanks Adam have turned all on for the rally in 2 weeks to get some more data. Its very frustrating as i cant replicate on tarmac or on the Dyno it hits target every time. (and no dirt roads in sydney any more) I have increased the derivative slightly to 0.5 so see it it makes a little difference. Beth. Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 1, 2020 Report Share Posted October 1, 2020 Stage 2 is P&D control, stage 3 is P&I. Stage 2 intent is to control the final approach to target, if you are overshooting target it is usually stage 2 settings. Stage 3 intent is to keep the boost on target once the target has been reached. In laymans terms, Proportional is how much the ecu adjusts the DC based on how much error there is. Too little P = slow to reach target(or never reach target), too much P = overshoot or oscillation. Derivative effect I find easiest to imagine as how quickly the ecu pulls back the DC when the boost is getting close to target (kind of like like putting on the brakes as you get close to target). Too little D = overshoot, too much D = boost approach rounded off. Bethanyc 1 Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted October 1, 2020 Author Report Share Posted October 1, 2020 Thanks that makes more sense. Ill try with the just a little more derivative first. Beth. Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted October 8, 2020 Author Report Share Posted October 8, 2020 I managed to get a quick run in today up to some speed under load with all the logging turned on that was suggested still overshot a little at derivative at 0.5 but certainly lots better Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 8, 2020 Report Share Posted October 8, 2020 Might need a touch more D, and a little I, try about 0.03 for I. Quote Link to comment Share on other sites More sharing options...
Bethanyc Posted October 13, 2020 Author Report Share Posted October 13, 2020 Worked perfectly all day at a rally at 0.7 D. boost was spot on all day One less thing to stress about thanks Adam. Quote Link to comment Share on other sites More sharing options...
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