Author Topic: Help with calibration + log + dyno results  (Read 27179 times)

Offline GintsK

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Re: Help with calibration + log + dyno results
« Reply #30 on: July 04, 2012, 07:27:50 am »


Gints - What you say is logical, i think that i might not need to set the rev limiter at 7000 rpm, if at 6400 i get nearly to original Wastegate settings.

What you mean under this?
In any case you are below turbine max flow. Either raised rev limiter (if engine mechanics allow that) or raised boost (if no knock) will gain the power. Seems so.

Offline fizban

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Re: Help with calibration + log + dyno results
« Reply #31 on: July 04, 2012, 08:35:16 am »
I mean that with boost controller off, engine load is around 170-175kpa at start of boost until rev limiter at 6400.
With boost controller at 50% duty cycle, engine load starts around 200kpa at start boost and drops reaches 175kpa at 6400.
So from this (and from the fact that peak power at the dyno got 280bhp with 0.7 bar of boost@6000 rpm) i reach the conclusion that its better to shift gear instead of pulling the car over 6400rpm.

Original engine rev limiter is at 7200rpm. Engine size is 1998cc and the turbo is GT28RS with 0.6 A/R. Checking and calculating the compressor maps of this turbo against engine size indicates that the turbo is efficient at 0.7-1.2 bar

Offline GintsK

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Re: Help with calibration + log + dyno results
« Reply #32 on: July 04, 2012, 02:09:38 pm »
Indication of maxed turbine flow is non rising injector duty cycle with rising rpms. Means constant airflow. Yours still rising at limiter point.
« Last Edit: July 04, 2012, 04:53:40 pm by GintsK »