1.1.81 boost control

[GintsK]

You also have unusual divider for tacho in 1.1.27 - 17
Theoretically 16 is right one. But this value is allowed to change. It influence just tacho, not all calculations in ECU.

[peter_jensen]

In new firmwares set “Boost valve off  below this pressure” to 10 and see if that helps. I think there is a bug.
Peter

[AVP]

i had this actually to begin with but was told to try back to 120kpa.

what bug is there noted?

@Billman: when megatune and rev counter is identical for the last year+ i shouldnt have any reason to doubt them. Once i made a vemstune upgrade, thats when all this was noted. So although it seem dumb as a solution to the rpm difference, i must say that i wouldnt have believed it if mechanical boost wasnt there.

If i didnt use vems and used motronic, seeing that the rev counter still shows that my full boost comes sooner than 4000rpm on 3d gear, its only after i vemstune which is more accurate that it appears that the spool of this turbo is @ 4200-4300 instead of 4100. and on 4th gear 4000 instead of 3780-3800rpm

if all tuners/developers suggest that vemstune is more accurate then i do believe them.

[billman]

Yes what bug is there?

All the configs I have seen there show 120-130kpa.

AVP I am with you there. If vems is correct then it should be fine.

[peter_jensen]

I bench tested 1.1.85 a week ago and boost looked strength. Then I tested on my car (1.1.81) and it seamed that it spools up faster but you can easy make a test and see if you get the same results.

Peter   

[AVP]

you mean by using 10kpa instead of 120kpa peter?

i dont like the valve to work from 1000rpm, so if use 10kpa as boost off below that pressure, and use refDC up to 2000rpm, will that have any negative effect on spool?

[peter_jensen]

You can try 40-50 and dc ref table = 0 in the low bins. It´s difficult to say if it will wok on your car but you can easely test it. it will take you five minutes to due so.