Oil Pressure on Track Pi Toolbox
Thread Starter
Burning Brakes
Joined: Nov 2022
Posts: 1,040
Likes: 1,104
From: Western Mass
Oil Pressure on Track Pi Toolbox
Just sharing some data that I pulled out of the Cosworth Pi Toolbox. I had an odd lower than expected oil pressure reading showing up on the GM Cosworth Toolbox download so I pulled data using the Pi Toolbox which has a lot more channels available than the GM version. It can be a pain in the butt to use and format and you need a license key to use (free from Cosworth). Youtube has some good tutorials to get started. This is what the oil pressure does during a session. Both vs RPM and G's. The low reading I saw (15psi) was probably a fluke/data snapshot error. For those inclined to get into more data that's hiding in the PDR the Pi Toolbox is a fun thing to play with.
Sr.Random input generator
Joined: Jan 2008
Posts: 7,750
Likes: 2,190
From: Sammamish, WA
These cars have variable oil pressure pump, and they don't really hit high pressures as the former gen cars, anymore. As long as there are no down spikes to 0-5 PSI region especially in high RPM ranges (and I don't see any), I think the readings are pretty healthy.
Thread Starter
Burning Brakes
Joined: Nov 2022
Posts: 1,040
Likes: 1,104
From: Western Mass
Agreed. It was just an odd data point that showed up one session. 8 of 9 had min oil pressure of 30 psi. One had shown as 15 psi which is out of family on all sessions last year. What I found interesting is how much data is lurking in the PDR data if you use the right software to extract it.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,735
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From: NE South Carolina
FWIW, It's actually a "variable oil volume pump." The result is variable pressure reading.Pic is from the C7 but interesting way they vary the volume. All controlled with a micro based on a number of inputs:
The actual "oil pressure" needed in sleeve bearing is much higher that the oil pressure reading. The key is the pressure you read only has to be high enough so oil is present at the rotating crack/rod journal to create the hydrodynamic pressure that keeps them from touching.
Last edited by JerryU; Feb 15, 2025 at 08:03 AM.
