overboost protecion settings help
#1
Senior Member
Thread Starter
iTrader: (3)
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
i have my kpa max set at 55.2 which is 8 psi and that should cut me at about 11 psi correct? what do i need to put for the other settings?
hysteresis -
cut from x -
at y event -
also, i removed the egr tube, do i need to disable the valve in ts?
hysteresis -
cut from x -
at y event -
also, i removed the egr tube, do i need to disable the valve in ts?
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
in MS you are using absolute pressure in KPA.
When you turn the car to the on position, not started look at your MAP reading, its probably somewhere near 100, depends on your location. Anything above that value you saw before startup is what you consider boost
So when people ask how much boost you are pushing, you tell him 1 bar or 14.5psi that is gauge pressure. gauge equals absolute minus atmo
http://www.asknumbers.com/psi-to-kilopascal.aspx
When you turn the car to the on position, not started look at your MAP reading, its probably somewhere near 100, depends on your location. Anything above that value you saw before startup is what you consider boost
So when people ask how much boost you are pushing, you tell him 1 bar or 14.5psi that is gauge pressure. gauge equals absolute minus atmo
http://www.asknumbers.com/psi-to-kilopascal.aspx
#12
Senior Member
Thread Starter
iTrader: (3)
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Wrong. But its something like -100 /7 or something.
OP just set the limiter at 160kpa and start reading up on the ms. if you cant set up overboost cut then you shouldn't be tuning the car yourself. And I dont mean this in an insulting way just trying to make sure you dont blow your **** up
OP just set the limiter at 160kpa and start reading up on the ms. if you cant set up overboost cut then you shouldn't be tuning the car yourself. And I dont mean this in an insulting way just trying to make sure you dont blow your **** up
#15
Boost Czar
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,688
Total Cats: 4,113
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I do 10 out of 10. Completely stops any ignition or injection.
I think when I did like 7 out of 10, you could keep the pedal mashed, and it would kinda bounce off the overboost like a rev limiter. I cut fully just so I know to take foot off go fast.
I think when I did like 7 out of 10, you could keep the pedal mashed, and it would kinda bounce off the overboost like a rev limiter. I cut fully just so I know to take foot off go fast.
#17
Boost Czar
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,688
Total Cats: 4,113
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
sounds like that's all it would do...not really great protection...you should at least pull a few spark events to stop it from over boosting...you know, since we are tlaking over boost protection.
#19
Senior Member
Thread Starter
iTrader: (3)
Join Date: Nov 2009
Location: Royal Palm Beach, FL
Posts: 725
Total Cats: 5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
ill run 10 of 10 then. do i leave hysteresis at 10? read up on it and hysteresis means that after the kpa drops x value the overboost will turn off?
so say im using 155 max kpa and my hysteresis is 10 the overboost will turn off once my kpa drops down to 145. is this correct?
so say im using 155 max kpa and my hysteresis is 10 the overboost will turn off once my kpa drops down to 145. is this correct?