Oil Pressure with Modified Supras

[razorlab]

Yeah I get some weird stuff in bm3 as well using the RAM channel.

this thread was very helpful, as my tuner had to adjust oil pressure for the VANOS exhaust target, and I didn’t have a baseline.

Yea the oil pressure RAM channels have been broken in BM3 for awhile. They did tell me earlier this week they did a huge update to logging items. Have you tried updating and logging this week?

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[Z4m40i]

They did tell me earlier this week they did a huge update to logging items. Have you tried updating and logging this week?

I noticed the app update and the fonts all different lol, but haven’t logged yet. I’ve had issues in prior versions logging PSIG vs PSIA and I needed to completely delete the app and reinstall.

 

[coldtires]

The log shows 0 for setpoint oil pressure. As for the absolute pressure it's low 40ish psi at idle with ambient pressure around 13.7-13.8psi. Gives me the value around 28psi give or take. What should I make of this?

 

[FuzzyRev]

Bryan in here being the people's champion on an oil-related subject. Who would've thought?

 

[coldtires]

Also forgot to add, the car was at 112psi at 2.8k RPM with an ambient pressure of 13.51 while in sport mode too. So that leaves us with 98.49psi.

 

[razorlab]

The log shows 0 for setpoint oil pressure. As for the absolute pressure it's low 40ish psi at idle with ambient pressure around 13.7-13.8psi. Gives me the value around 28psi give or take. What should I make of this?

Not too bad, about 7psi over. This is with the car fully warmed up? Did you log oil temp too?

 

[razorlab]

Also forgot to add, the car was at 112psi at 2.8k RPM with an ambient pressure of 13.51 while in sport mode too. So that leaves us with 98.49psi.

That seems very high. AFAIK, the oil pump fails into high pressure mode for safety. @garudathree recently replaced his oil pump on his 21. Maybe he can give you some more insight.

 

[coldtires]

Yeah the car was warmed up.

That seems very high. AFAIK, the oil pump fails into high pressure mode for safety. @garudathree recently replaced his oil pump on his 21. Maybe he can give you some more insight.

This was a theory I had too which is why I want to get it replaced. Would there be any issues driving it around as long as it's in normal mode? The car usually peaks at 100psi in that mode.

 

[garudathree]

you can run into exhaust vanos deviation/rail pressure issues if the oil pressure control is in safety mode. double check those two items in logs, if no issues, you can probably drive until it becomes more noticeable.

 

[coldtires]

Gotcha, I see you can log rail pressure in MHD+ and in one log stayed steady at 5000 (not sure what value is considered normal) and dips when RPM drops. As for exhaust vanos, how would you go about logging that?

 

[razorlab]

Gotcha, I see you can log rail pressure in MHD+ and in one log stayed steady at 5000 (not sure what value is considered normal) and dips when RPM drops. As for exhaust vanos, how would you go about logging that?

5000 is target at WOT for rail pressure.

Vanos:

 

[coldtires]

Did another log with those parameters on. It looks like both VANOS EX act. and VANOS IN act. stay together with VANOS EX req. and VANOS IN req. Is there a specific value I should be looking at or is that fine?

Rail pressure is already at 5000 by 1.4k RPMs too.

 

[razorlab]

Did another log with those parameters on. It looks like both VANOS EX act. and VANOS IN act. stay together with VANOS EX req. and VANOS IN req. Is there a specific value I should be looking at or is that fine?

Rail pressure is already at 5000 by 1.4k RPMs too.

Do you want to share your logs?

 

[coldtires]

Not sure how to upload the .csv since it won't let me.

 

[coldtires]

I've just ended up ordering the updated oil pump and sensor. I will post an update on the findings when I get the old pump out.

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