PID boost control code

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May 21, 2008 | 11:15 PM

#46

dudical26

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From: NNJ

Quote:

Originally Posted by tephra

definitely...

I am just having trouble at the moment because I am trying to simulate different P,I,D gains and their affect on the Output WGDC.

I was kinda hoping that 1 P,I,D would fit all, but I think its going to be a case of every car is different :\

I think you are right in saying each car is different. It matters a lot on turbo, what solenoid you use, if you have restrictor pills in, altitude, etc...

With that being said I think most people using stock turbo and a GM solenoid should be able to have pretty similar gain settings.

May 22, 2008 | 03:27 PM

#47

dan l

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Quote:

Originally Posted by tephra

1 PID would fit all, each user would have to tune to their car however.

May 23, 2008 | 08:03 AM

#48

burgers22

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From: Oxfordshire

Quote:

Originally Posted by mrfred

I hear quite a few people talking about having difficulty with the boost overshoot. Makes me wonder if a smaller pill at the tee is not the way to go. Can't say for sure though because razorlab seems to be able to make the restrictor pill method work very well, and I've never tried the restrictor pill method.

I think the best method is to make BDLE roughly the same as the boost you are actually getting during spool, and make WGDC about the same as that which you need to archive peak boost.

I do not support the idea that having WGDC at 100% will improve spool. This would only be true if the wastegate was opening during the spool period, and the BCS was not able to bleed enough air to stop this happening.

MB

May 23, 2008 | 09:11 AM

#49

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by burgers22

...

I do not support the idea that having WGDC at 100% will improve spool. This would only be true if the wastegate was opening during the spool period, and the BCS was not able to bleed enough air to stop this happening.

MB

The question is how to know for sure that the WG is staying shut until getting close to target boost.

May 23, 2008 | 10:03 AM

#50

jcsbanks

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From: UK

When I've played with handheld pumps and actuators before they only move impressively close to their rating with little in the way of "wastegate creep".