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Author Topic:  Wastegate duty cycle thoughts  (Read 5003 times)

Offline autox4fun

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Wastegate duty cycle thoughts
« on: October 07, 2019, 10:57:45 PM »
Tuning folks, this one is for you..
10-12 ecu flex/sho
As I request throttle, wastegate duty cycle pins full on.  99.99%
This is light throttle or more.
From a stop or a roll.
Acts as if it's trying to clear the exhaust/or any current boost.
This is for a few ms to a full second, then gets back to pwm for the rest of the drive.
This is a tune, but acts the same throughout different tunes
So, is this a normal act?
If you have more questions please ask..
Screen shots of the logs can be posted if needed.

Randy
 
Ported - Heads, EX manifolds, and turbine housings, GH - turbos, TQ, & IC, EPP intake and hotpipes w/Tial (11lbs), x35 spacer, MSD coils, PPE catted DP, Magnaflow exhaust, DW in tank, Livernois Hpfp, Fuel-IT e-sensor, AEM WMI, SHO trans cooler, Megan Coilovers, Retrofitted Headlights, TSW wheels

Offline StealBlueSho

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Re: Wastegate duty cycle thoughts
« Reply #1 on: October 08, 2019, 03:26:23 PM »
Would need to see logs... are you tuning this car? The WGDC will ramp up quick in order to quickly spool the turbos to hit desired load...

Offline 76fomoco

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Re: Wastegate duty cycle thoughts
« Reply #2 on: October 08, 2019, 07:36:10 PM »
Have you checked for boost leaks?
2013 PP AJP E30 160 TS, sp542 plugs, 3 bar, PPE catted DP's, GH IC, GH turbos, XDI-35, EPP hot and intake
Best 3-29-21  11.85 with 3000 DA
DA trap best 117.96
E30 = 492 whp, 536 wtq
E30+meth 498 whp, 539 wtq

Offline autox4fun

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Re: Wastegate duty cycle thoughts
« Reply #3 on: October 24, 2019, 10:02:12 PM »
Well, I had my thoughts 180'D
As I was reading it, I thought 100% was fully opening the waste gate. 
100% is a full boost request, less duty cycle is to throttle the flappers open
Ported - Heads, EX manifolds, and turbine housings, GH - turbos, TQ, & IC, EPP intake and hotpipes w/Tial (11lbs), x35 spacer, MSD coils, PPE catted DP, Magnaflow exhaust, DW in tank, Livernois Hpfp, Fuel-IT e-sensor, AEM WMI, SHO trans cooler, Megan Coilovers, Retrofitted Headlights, TSW wheels

 

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