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ECU boost users - Do you want a higher boost cut load?

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Old Sep 27, 2009 | 11:50 AM
  #16  
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YES, this would be a great feature
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Old Sep 27, 2009 | 12:38 PM
  #17  
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I think this would be a GREAT feature to have. At my current boost im getting close to the current limit and the idea of just increasing delay time isn't something i really want to do.
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Old Sep 27, 2009 | 01:41 PM
  #18  
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Mod had been posted:

https://www.evolutionm.net/forums/ec...nge-638-a.html
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Old Sep 28, 2009 | 08:54 AM
  #19  
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Originally Posted by mrfred
Not sure what you mean. For people with ECU boost control hitting more than 318 load, the only other option would be to set the boost cut delay to 1 bizillion seconds. By increasing the range of boost cut load values, the system can be used as it was intended.
I just meant specifically that I think fuel cut is a little dangerous and the resulting loads on the drive train are not good for it. If you happen to encounter this mid turn (as unlikely as that would be) the results could be very devastating with an unbalanced chassis.

For anyone willing to run tephramod v7 I'd say the boost = 0% on knock count would be a much better feature to utilize.
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Old Sep 28, 2009 | 11:37 AM
  #20  
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Originally Posted by fostytou
I just meant specifically that I think fuel cut is a little dangerous and the resulting loads on the drive train are not good for it. If you happen to encounter this mid turn (as unlikely as that would be) the results could be very devastating with an unbalanced chassis.

For anyone willing to run tephramod v7 I'd say the boost = 0% on knock count would be a much better feature to utilize.
I get the feeling that the load limit feature is there to protect the motor when the boost control system fails. Keeping the load limit set high enough to be encountered only when the boost control system fails should be the plan. However, I suspect that some people try to use the load limit to make up for bad boost control. tephra's boost kill feature might be more appropriate for them.

Originally Posted by Creamo3
Just for the sake of clarity; this is not needed if you convert over to SD?
Its not specific to SD. Its only useful if your car is pushing more than about 300 load, and you want to have protection for a failed boost control system.
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Old Sep 28, 2009 | 12:15 PM
  #21  
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Originally Posted by mrfred
I get the feeling that the load limit feature is there to protect the motor when the boost control system fails. Keeping the load limit set high enough to be encountered only when the boost control system fails should be the plan. However, I suspect that some people try to use the load limit to make up for bad boost control. tephra's boost kill feature might be more appropriate for them.



Its not specific to SD. Its only useful if your car is pushing more than about 300 load, and you want to have protection for a failed boost control system.
I can agree with that. I wasn't thinking about a complete failure of the solenoid (stuck @ 100%) or a WG boost line falling off.

Saving motor > some stress on driveline > blown motor > flipped car

Set properly there really should be no way for someone to engage this mid-turn, but stranger things have happened. I always appreciate the option
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Old Sep 28, 2009 | 12:41 PM
  #22  
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From: Hayward
Originally Posted by fostytou
I just meant specifically that I think fuel cut is a little dangerous and the resulting loads on the drive train are not good for it. If you happen to encounter this mid turn (as unlikely as that would be) the results could be very devastating with an unbalanced chassis.

For anyone willing to run tephramod v7 I'd say the boost = 0% on knock count would be a much better feature to utilize.
While I agree with your point I think a drastic boost drop mid corner would have the same result of disrupting the chassis.
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Old Sep 28, 2009 | 01:49 PM
  #23  
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I would set it high enough to come into play only when the boost error correction and the knock sensor are unable to tone things down enough to be within a safe range. Like was mentioned, for an all-out ECU Boost Control failure in some way. Having it too close to the current load curve can cause users to trigger the load limit too soon (i.e; weather changes,small boost leaks,etc..) and just be a PITA. I would guess setting the limit with a load value of 20 higher than the 'tuned' curve would be high enough IMO. Honestly, I've only tuned a few Evo's below the original load threshold so I never get to utilize this feature as often as I'd like to.
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Old Sep 28, 2009 | 01:53 PM
  #24  
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From: Hayward
Originally Posted by Jack_of_Trades
I would guess setting the limit with a load value of 20 higher than the 'tuned' curve would be high enough IMO.
That is a good reference point. That is pretty much what I do and have done on a ton of track cars with good results, and those get pretty loaded up on track.

- bryan
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