RomRaider

HI need some help. my ecu doesnt read past 22.5 psi but my gauge mach the target boost.
i dont know what kinf of limit do that.
it makes 15 psi at 4000 rpm in 3er gear pull.

Car is sti 08 edm
mods:
turbo its modded blouch 20g xtr with 3073r ball bearing internal waste gate 8cm hotside
front mount ic
4bar map sensor omni
900cc inyectors.
equal headers.
ebcs 3port
intake 3"
tgv deletes.
thx for all your help¡¡¡¡¡¡¡

If you have Target Boost , use that.

Sorry. I use it in other log my target boost is 26 psi. And muy gauge maches it!. But the ecu dont...dont know why it doesnt read more...

Correct me if I'm misunderstanding the issue here, but doesn't the ECU, while logging max out it's ability to read anything past ~18.5psi or ~22psi using the "manifold relative" and "manifold relative (corrected)" respectively?

Yes. That is. But my innovate reads and match my target boost that its 26 psi.
I have the omni4 bar sensor scale with the tables they provide.

My mistake, Target Boost was not the parameter to log.
There should be (unless not defined) two parameters such as:
Manifold Absolute Pressure (2-byte)** or
Manifold Relative Pressure (4-byte)*
that are not limited.

I dont know why my ecu doenst read in manifold absulute or relative the amount of boost car makes.. the innovate shows a lot of more boost. Exactly the same i demand.
While the ecu cant read more than 22. Im sure i am targeting the boost that innovate reads because if y demand 25 psi its shows 25. If i demand 27 its shows 27...
I think problem is the calibration of the 4 bar mao sensor.
I only see in ecuflash 2 parameters to adjust de map sensor. Its correct?

I posted some logs and my rom

Your ECU is reading MAP at 38+psi
I hadn't looked at the logs till now. You seem to be logging way to many parameters for tuning purposes, and many useless ones at such a slow polling rate. Anyway ...
What's your ATM pressure logged compared to a barometer?

Manifold Absolute Pressure (4-byte)* (psi absolute) - has no upper limit
Manifold Relative Pressure (psi) - maxed out at 18.43 due to only 8 bits of data possible. "(x-128)*37/255" where x is <=255
Manifold Relative Pressure (Corrected) (psi) = is Manifold Absolute Pressure (37 max) minus Atmospheric Pressure
Target Boost (4-byte)* (psi relative sea level) = Target Boost from table(s) including any compensation (not a logged value of actual boost)

Using (psi relative sea level) assumes a fixed 760kPa in the result
If your MAP sensor scaling is off then so will all your tuned tables values using it and the results.
MAP sensor only has two values for scale it, a multiplier and an additive value.

Sorry to bring back that same thread, I'm having the same issue and it's not very clear.

Manifold Relative Pressure (psi) - That is limited to 18psi, Understood.
Manifold Relative Pressure (Corrected) (psi) - That is limited to 22.5 psi as MAP maxes around 37 - Atm Pressure which is 14.5 at sea level, so 22.5?

So even with a well scaled 4bar MAP sensor, I need to log the Manifold Absolute Pressure (4-byte) in order to get the real data? I was logging Manifold Relative Pressure (Corrected) (psi) and it felt so wrong with the car only boosting up to 22.5 psi.. it felt waaaaay higher boost.