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Title: med17.5 boost dropping off at 5,400rpm Post by: karlblanch on May 28, 2018, 09:11:20 AM I've had this car a few months now, wrote various different maps, however, I can't stop boost dropping off after 5,400rpm
Is it a mapping problem? or maybe a problem with the n75? or do I need to change boost PID? This is the first med17.5 i've mapped, so I'm still learning please find attached the stock, modified file and the vcds log Any help would be great :) Title: Re: med17.5 boost dropping off at 5,400rpm Post by: vwaudiguy on May 28, 2018, 01:22:24 PM Log N75 duty.
Title: Re: med17.5 boost dropping off at 5,400rpm Post by: Beaviz on May 29, 2018, 02:48:29 AM Stock turbo and exhaust? If yes, then it is simply just running out of puff.
Title: Re: med17.5 boost dropping off at 5,400rpm Post by: karlblanch on May 29, 2018, 02:39:35 PM I have a 3" downpipe, with stock exhaust, I've seen plenty of k03's holding at least 1 bar to redline, mine drops off to 0.5 bar
Heres a log of the n75 Title: Re: med17.5 boost dropping off at 5,400rpm Post by: vwaudiguy on May 29, 2018, 03:50:36 PM How many miles on the turbo? Might be a weak actuator. Most recent DV revision? Doubt it's anything tuning related if you're @ 95% duty and not meeting req. I didn't look though your tune.
Title: Re: med17.5 boost dropping off at 5,400rpm Post by: Beaviz on May 30, 2018, 12:09:04 AM How many miles on the turbo? Might be a weak actuator. Most recent DV revision? Doubt it's anything tuning related if you're @ 95% duty and not meeting req. I didn't look though your tune. I agree! Not tune related. Title: Re: med17.5 boost dropping off at 5,400rpm Post by: gman86 on May 30, 2018, 03:00:09 AM "Wrote" multiple maps but not even logging in turbo mode on VCDS?
Your N75 is maxxed. You've ran out of turbo. Title: Re: med17.5 boost dropping off at 5,400rpm Post by: littco on May 30, 2018, 04:59:45 AM I agree! Not tune related. I agree too. The turbo is capable of making more than the actuator is capable of holding the boost for so I almost definitely say the actuator/Wastegate is blowing open.. Title: Re: med17.5 boost dropping off at 5,400rpm Post by: nyet on May 30, 2018, 08:50:49 AM Or leak.
He didn't mention trims |