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Old 09-07-2011, 10:50 PM   #1
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Default overboost protecion settings help

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?
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Old 09-07-2011, 11:37 PM   #2
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Originally Posted by Clos561 View Post
i have my kpa max set at 55.2 which is 8 psi and that should cut me at about 11 psi correct?
Uhhhh . . . atmospheric pressure at Sea Level is 14.7psi (~100kPa). Check out your MAP gauge before you start the car.

8psi of boost is 14.7 + 8 = 22.7psi (~155kPa).
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Old 09-07-2011, 11:45 PM   #3
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what about the other settings?

ok, i understand the kpa now
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Old 09-07-2011, 11:53 PM   #4
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In MSPNP and MS-1, overboost only has the kPa setting. Not familiar with the more advanced MS variants. Sorry.
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Old 09-08-2011, 01:16 AM   #5
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i think i read somewhere that kpa to psi conversion is kpa value, -100, and then divided by 6.895 is your psi rating

Last edited by bmxfuel007; 09-08-2011 at 02:01 AM.
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Old 09-08-2011, 01:28 AM   #6
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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
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Old 09-08-2011, 01:42 AM   #7
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oops, yup, divide by 6.895... not 10
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Old 09-08-2011, 01:56 AM   #8
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i think i read somewhere that kpa to psi conversion is kpa value, -100, and then divided by 10 is your psi rating

information provided most likely from the great braineack
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Old 09-08-2011, 02:02 AM   #9
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yeah, edited. but then that also means I've been boosting way more than my boost gauge has been telling me..... hmmmmmmm
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Old 09-08-2011, 02:14 AM   #10
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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
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Old 09-08-2011, 02:30 AM   #11
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yeah, edited. but then that also means I've been boosting way more than my boost gauge has been telling me..... hmmmmmmm
Doesn't really matter.
If you're not running lean or pinging there's no real set limit or anything like that.
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Old 09-08-2011, 09:41 AM   #12
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Quote:
Originally Posted by 18psi View Post
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
This is all new thats why i want to make sure i set the overboost right. What do i need to input for the other values
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Old 09-08-2011, 09:45 AM   #13
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I'm just using 10kpa for hysteresis
0 for the rest underneath
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Old 09-08-2011, 10:01 AM   #14
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How do you get an overboost protection, when you cut 0 from 0 ignition events?

I have i at cut 4 from 5 - other suggested 9 from 10 or such.
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Old 09-08-2011, 10:38 AM   #15
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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.
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Old 09-08-2011, 10:57 AM   #16
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Originally Posted by Zaphod View Post
How do you get an overboost protection, when you cut 0 from 0 ignition events?

I have i at cut 4 from 5 - other suggested 9 from 10 or such.
I have to look at what it does again, but I think it pulls back timing. It still works.
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Old 09-08-2011, 10:59 AM   #17
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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.
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Old 09-08-2011, 11:01 AM   #18
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Quote:
Originally Posted by Braineack View Post
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.
it still stops it from overboosting, I know because I've flown into few times with this crappy boost controller
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Old 09-08-2011, 11:03 AM   #19
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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?
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Old 09-08-2011, 11:04 AM   #20
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correct. it'll feel like a brick wall when you hit it, just fyi.
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