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Thank you for this highspeed racetrack run... great downpipe sound. Oil temp keeps climbing from pistons heat
What's strange is that coolant temp does not climb, it cools more than it absorbs heat.
CAN-B fault
rear blindspot radar modules are disrupted
Do we have clear evidence, the pilot has a case of stock disruptions?
The slowed gear up shifts are not caused by a TCU issue but the busy ECU & CAN-C... stock chassis issue.
TCU is forced to use the "best efforts" sloppy shifts we're familar with. Driver clearly notes the poor shifts despite wide throttle/high RPM''s.
Last edited by CaliBenzDriver; Aug 2, 2025 at 05:19 AM.
I wonder how he would like the rear wheel drive version. I love mine and think it’s super fun to daily, though have never been on a track.
I also didn’t see the traction control in sport or switched off so I wonder if he would’ve liked it a little better in that mode also in sport 2 with suspension so the steering tightens up. If you follow him, he drives tons of nice cars but doesn’t always know the tech….truly just goes out and drives the snot out of the cars.
Thank you for this highspeed racetrack run... great downpipe sound. Oil temp keeps climbing from pistons heat
What's strange is that coolant temp does not climb, it cools more than it absorbs heat.
CAN-B fault
rear blindspot radar modules are disrupted
Do we have clear evidence, the pilot has a case of stock disruptions?
The slowed gear up shifts are not caused by a TCU issue but the busy ECU & CAN-C... stock chassis issue.
TCU is forced to use the "best efforts" sloppy shifts we're familar with. Driver clearly notes the poor shifts despite wide throttle/high RPM''s.
So as far as We know there is no easy fix for this ? It's actually kept Me in sport + mode when driving hard.
So as far as We know there is no easy fix for this ? It's actually kept Me in sport + mode when driving hard.
Yes there is.
No it's not one single fix.
You can experiment getting closer with these preliminary steps:
-- MOD-X:5W-50 or better racing oil for tracking
-- ALT-LIN stable voltage
-- REBOOT + FLOAT to sanitize networking issues as often as needed.
-- ENH CAN Networking no bottleneck slow downs
I'm currently further interacting with some root cause/fixes of bottlenecked unstable network (CGW/ESP/ECU/..). The results improve the engine throttle control enough that it changes shift points (much like viscosity bumps did).
You will benefit from good module networking besides all the "stable factors" noted earlier.
Understand that any basic module that's assaulting CGW with non-stop junk-traffic is given the ability to detune ECU-TCU.
You want good peripherals because VIP's share the same network modules. In the racetrack video the faults that pop-up (blindspot + TPMS) are the tip of the iceberg. ECU-TCU are designed that way to require hands-on service.
The tranny can really put a smile on your face once you get "pressure sensitive throttle". When ECU-TCU are in the mood, they hook up gears and shift like ninja-kicks, super-light chassis, instantaneous throttle response.
I am currently researching how to enable that bleeding edge to stay consistent (my "Beast-MODe" project).
> Focus on engine + CAN...
To enable coordinated seemless shifts :
you'll need nimble precise throttle by ECU
plus near realtime CAN bandwidth
else shifts are stuck with "best-effort" mode.
Last edited by CaliBenzDriver; Aug 2, 2025 at 04:55 PM.
>What's strange is that coolant temp does not climb, it cools more than it absorbs heat.
low 20C ambient and high speeds (lots of airflow), but still not enough to maintain oil temps (however accurate the oil temp gauge is, my understanding its not a real oil temp sensor but an "estimation")
>What's strange is that coolant temp does not climb, it cools more than it absorbs heat.
low 20C ambient and high speeds (lots of airflow), but still not enough to maintain oil temps (however accurate the oil temp gauge is, my understanding its not a real oil temp sensor but an "estimation")
There's a wide gap between coolant & oil temp as if they were not connected.
We know pistons are positively well sprayed above 3500.R'.... great!
Is the engine oil-Tstat jammed to limit heat exchange?
It's interesting to witness how oil gauge shows it's accumulating heat up and up much like dry stock pistons do.
Here piston heat is removed but not circulated out.
Last edited by CaliBenzDriver; Aug 2, 2025 at 11:41 PM.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
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