Closed loop during WOT?

[small tuner]

Ideally you want it just above what PSI you are reading and may read in the future in better DA. This will make the SD equations fit the best.

Leaving the MAP per air mass(M) and MAP at zero air mass(b) tables stock he would need to use 30-31 PSI to see 1.5-1.6 engine load. Mx+b=y. x is air mass in LBs, derived from MAF lb/min and y is calculated MAP. Start at the calculated MAP MAX in inHg and work backwards you will get air mass values. divide those by the engine displacement value 0.00183 and you will get the maximum load values.

example at 4286RPm

At 31 psi
63inHg=2.44inHg+x(19,865inHg/Lbm)

60.56inHg=x(19,865inHg/Lbm)

0.00305Lbm= x

0.00305/0.00183= 1.67 engine load.

If it was lower:
at 23 psi
47inHg=2.44inHg+x(19,865inHg/Lbm)

44.56inHg= x(19,865inhg/Lbm)

0.0022Lbm=x

0.0022/0.00183= 1.23 engine load

you just clear out the clouds

[rgaum12]

ok so now it sometimes goes into closed loop and the back into open shortly after.. occurs at 8:12:49 on log.

log and updated tune attached. appreciate the help.

closed 3.hpl
the one.hpt

[murfie]

Still hitting the calculated MAP max.

I made a simple spreadsheet to check your values and you are at the limit, even when not at full throttle, around 2334 RPM.

Unlucky you HPT hasnt added a SD calculator in to the editor yet. I will see if I can make a simple sheet one so you can update your Values.

Start logging throttle angle. I attached the Graph you will use.

Calc MAP Max.PNG

[rgaum12]

Still hitting the calculated MAP max.

I made a simple spreadsheet to check your values and you are at the limit, even when not at full throttle, around 2334 RPM.

Unlucky you HPT hasnt added a SD calculator in to the editor yet. I will see if I can make a simple sheet one so you can update your Values.


Start logging throttle angle. I attached the Graph you will use.

Calc MAP Max.PNG

Ok here is a log with your graph.

First pull didn't even go open loop. Seems like its on the 2nd gear pulls when RPM's spike quickly. Other pulls are 3rd gear.

[GrannySShifting]

What was the Calc MAP he was seeing and what was the limit set at?

[murfie]

What was the Calc MAP he was seeing and what was the limit set at?

The picture I posted shows that. He's not hitting it any more, other than verify around 2300, and still going closed loop. He doesn't have all the PIDs to make this easier to find. Could be torque/load related or some other thing not defined in the tune. Hopefully he can work with support and get more useful info soon.