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how-to: ECU-based direct boost control

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Old Oct 8, 2008 | 09:51 PM
  #451  
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altitude will make a difference as well...
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Old Oct 8, 2008 | 10:57 PM
  #452  
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Originally Posted by tephra
altitude will make a difference as well...
Indeed. I am pretty much at sea level.
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Old Oct 9, 2008 | 06:01 AM
  #453  
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From: MD
Where do I paste the patch to? Can the stock solenoid handle 28psi?
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Old Oct 9, 2008 | 06:42 AM
  #454  
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From: NNJ
Originally Posted by razorlab
Yes, just up the Boost Adder and do the math

Example:

Boost adder = 20
Baseline Boost table @ 4000 = 23

20+23= 43

Minus your atmospheric, let's say 14.7

43-14.7 = 28.3 psi
I like to set boost adder = 34.7

That way your basline boost is simple to work with in your head. 22psi is just 2, and so on.
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Old Oct 9, 2008 | 06:44 AM
  #455  
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Originally Posted by dudical26
I like to set boost adder = 34.7

That way your basline boost is simple to work with in your head. 22psi is just 2, and so on.
haha, that is an interesting way of doing it.
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Old Oct 9, 2008 | 06:45 AM
  #456  
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From: NNJ
Originally Posted by mrfred
mixmastermatt has also logged up to 32 psi.
Is there anything that can be done to log boost higher than 32psi? I imagine thats the electronic limit of the sensor?

I want to go a little higher than that on meth.

I suppose boost control could still work a touch higher than that even if the sensor would not log it. You would just have to use load as a means of guessing how high your boosting for the spike?
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Old Oct 9, 2008 | 06:46 AM
  #457  
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From: NNJ
Originally Posted by MR Turco
haha, that is an interesting way of doing it.
It becomes necessary when you want to boost to 30 psi or higher.
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Old Oct 9, 2008 | 06:52 AM
  #458  
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From: MD
anyone on the patch and solenoid?
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Old Oct 9, 2008 | 06:52 AM
  #459  
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Originally Posted by dudical26
It becomes necessary when you want to boost to 30 psi or higher.
I like it. I never would have thought to do it that way. (that's what she said)
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Old Oct 9, 2008 | 09:27 AM
  #460  
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Originally Posted by dudical26
Is there anything that can be done to log boost higher than 32psi? I imagine thats the electronic limit of the sensor?

I want to go a little higher than that on meth.

...
Yeah, its the limit of the sensor. You'd need a 3.5 or 4 bar MAP sensor. Its amazing what boost levels people are pushing now.
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Old Oct 9, 2008 | 11:17 AM
  #461  
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Would this really be worth it for me to switch from load based control??
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Old Oct 9, 2008 | 11:40 AM
  #462  
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Originally Posted by mrfred
Yeah, its the limit of the sensor. You'd need a 3.5 or 4 bar MAP sensor. Its amazing what boost levels people are pushing now.
Yes it is,lol. I have a 3.5 bar Zeitronix map sensor but it hasn't been dialed in to replace the JDM map just yet (waiting for MrFreds magic to happen when he has time). Its roughly the same cost as the JDM map but with less resolution since its range is .5-4.5 volts but it should get the job done once MrFred can find a way to increase the resolution.
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Old Oct 9, 2008 | 11:41 AM
  #463  
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From: Opelika,AL
Originally Posted by house_of_senate
Would this really be worth it for me to switch from load based control??
Well, do you prefer to hit the same load values with variances in boost levels or would you prefer to have the same boost levels and have a variance in load? Thats the big difference I noticed.
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Old Oct 9, 2008 | 12:05 PM
  #464  
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Originally Posted by Jack_of_Trades
Yes it is,lol. I have a 3.5 bar Zeitronix map sensor but it hasn't been dialed in to replace the JDM map just yet (waiting for MrFreds magic to happen when he has time). Its roughly the same cost as the JDM map but with less resolution since its range is .5-4.5 volts but it should get the job done once MrFred can find a way to increase the resolution.
Anxiously waiting too...
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Old Oct 9, 2008 | 01:48 PM
  #465  
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Originally Posted by Evoryder
Anxiously waiting too...
Its going to be another few weeks. I'm working on a much higher value patch (and my wife has discovered the TV series "House" which I'm finding to be mildly entertaining).
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