SCT Boost in PSI PID vs kpa

[StealBlueSHO]

Anyone else notice that the boost in PSI is about .5 psi off in the SCT X4 PID? 211kpa is about 15.9psi but the Boost PID is showing around 15.4? I wonder why the discrepancy?

211 kpa = 30.60psi

30.60psi - 14.69(1 atm) = 15.91psi..

Curious if anyone has seen this? If the PID is not accurate then its garbage in my book...

 

[FoMoCoSHO]

What does you baro pid say?

I suspect it references baro and that changes depending on your altitude.

 

[StealBlueSHO]

99.00

 

[FoMoCoSHO]

So neither is correct, lol...

211 - 99 = 112 KPA = 16.34 PSI

 

[StealBlueSHO]

I love my ECU..... nothing is ever normal with my car...


Sent from my iPhone using Tapatalk

 

[FoMoCoSHO]

I wonder if its referencing TIP or MAP?

I'm not running the baro PID so I can't compare.

A cursory glance shows MAP and TIP about 2 PSI different on a random log so maybe that's the discrepancy.

 

[8nutz8]

not sure if this contributes much but being way the hell up here with much less atmosphere i always factor in my baro pressure to calculate kpa to psi.
my tune commands 191kpa-83kpa(baro)=15.66 psi.
so if someone asks i have a 15ish psi tune.
unless your almost exactly at sea level i feel you should factor it in so you know how much PSI over YOUR atmosphere you're running.
if i used the universal 14.7psi of atmosphere i'd think i was at 13 psi LOL!


Sent from my iPhone using Tapatalk

 

[8nutz8]

and just for giggles . . this is the highest i've driven it
68 kpa baro!

Sent from my iPhone using Tapatalk

 

[ajpturbo]

and just for giggles . . this is the highest i've driven it
68 kpa baro!

Sent from my iPhone using Tapatalk

Damn I couldn't live there...Cars would be too slow lol....What was that elevation?

 

[StealBlueSHO]

6000ft?


Sent from my iPhone using Tapatalk

 

[ajpturbo]

6000ft?


Sent from my iPhone using Tapatalk

Oh I think higher...I could be wrong but I think SHOBRO's normal elevation is around 6k and baro is like 80ish

 

[8nutz8]

IIRC that was ~12,000ft. Don't worry Brad, if you were up that high i would be worried about YOU suffocating!

And yeah the local racetrack i race at is 5800ft. But Brad's tune still got me into the 12's!

 

[FoMoCoSHO]

IIRC that was ~12,000ft. Don't worry Brad, if you were up that high i would be worried about YOU suffocating!

And yeah the local racetrack i race at is 5800ft. But Brad's tune still got me into the 12's!

How much boost are you running?

 

[8nutz8]

191kpa dsd or 15.6 psi over atmospheric.


Sent from my iPhone using Tapatalk

 

[StealBlueSHO]

IIRC that was ~12,000ft. Don't worry Brad, if you were up that high i would be worried about YOU suffocating!

And yeah the local racetrack i race at is 5800ft. But Brad's tune still got me into the 12's!

That's insane...