N75 Duty

[ryan_s3]

Was just wondering about this,the n75 duty hits 95.3% max in a attempt to spool up fast(requested boost alot higher than actual) then duty levels out to between 70-90% till redline is this correct.Boost seems to be a touch higher than requested.

 

[m0rk]

Sounds like it's trying to go wastegate shut then?

when you say a touch, what's that in numbers?

 

[Madmile]

Sounds about correct 95.3% until about 3000rpm on mine it then drops back down to about 71% duty cycle at the mid point it then starts climbing again and mine hits 85% by 6800-7000rpm. What duty cycle are you see 6500rpm-7500rpm. I am pretty sure i have warped/cracked my exhaust housing and the exhaust gas that should be spooling the turbo it leaking direct to atmosphere. I am changing the map sensor on thursday as jabba said they would change it anyway, so i might as well save the labour time and do it myself before it goes. Looks like i might have a .20 housing on though.

 

[ryan_s3]

Engine Speed Intake Temp N75 Duty Cycle

/min °C 0%
2640 19 1.6
2760 18 95.3
2880 17 95.3
3000 15 95.3
3160 15 69
3360 15 80
3600 15 81.6
3880 15 78
4160 15 75.3
4440 16 73.7
4680 17 73.7
4960 18 73.7
5200 18 77.3
5440 19 80.8
5680 21 85.1
5920 21 87.8
6160 23 89
6360 24 89.4
6560 24 89.4
6720 24 89.4


There you go guys,what do you think?

 

[Martyn]

Nice intakes Can't comment on the N75 duty though

 

[ryan_s3]

Custom Forge Front Mount and water injection,not bad for 1.53bar peak to 1.45 held on a ihi.