Dash pot settings

[Lotussuper7]

Can anyone suggest some sensible settings as a starting point?

[Adamw]

It seems this is quite variable in my experience, possibly depending on size of throttle and plenum volume etc.  I will attach a few example settings from cars I have tuned but you will notice they are hugely different.  The LS4 needs 7% dashpot throttle, whereas my evo needs no dash pot at all...

To tune it set up a time plot with RPM and idle target one the same plot like pic below.  The idea is you want the RPM to drop down to target as fast as possible without significant undershoot.  

Here is our LS4 race car with our default base map dash pot settings, notice the big dip under target then a big oscillation after the near stall:

 

Now here it is after tuning:

 

LS4 race engine (E-throttle):

 

Subaru WRX (Ethrottle):

 

Evo7 (stepper motor):

 

FD RX7 (solenoid):

 

XR6 Turbo (Ethrottle):

[Lotussuper7]

Thanks.

That's some great information! It will no doubt help more people than just me.

Thanks again.