DerHase
Autocross Champion
- Location
- Hampton Roads, VA
- Car(s)
- 2019 GTI Rabbit
Been busy with the holidays and stuff but here are some updates:
Temp data from VIR:
https://datazap.me/u/derhase/stock-tune-temp-data-track-vir?log=0&data=0-2-4-5-7-8-9-13-15
https://datazap.me/u/derhase/stock-tune-temp-data-track-vir?log=1&data=0-2-4-5-7-8-9-13-15
Pertinent info I got from it:
-DO88 IC heat soaks to about 12F above ambient on the stock tune in a 20min session. Perfectly acceptable. Honestly due to the IAT location, it wouldn't surprise me if it's actually lower than reported because of the sensor/intake getting heat soaked on track. What will be important is checking the delta again once tuned.
-DSG temp is fine and increases slowly throughout the whole session. I'd probably feel comfortable running it to 220F or so.
-Coolant temps not a problem.
-Oil temps don't seem to be an issue. We'll see what happens once tuned. Depending on how quickly it approaches 270F once tuned... I MAY see if it's possible to get away with just doing some massive hood vents. I 100% believe that this chassis' primary cooling problem is airflow. More through the radiator and everything, the better it'll be.
-I was running the heat on speed 2 or 3. Nothing crazy but there was a little extra help there.
-On one of my first days at VIR on stock IC, I was able to get to 270F a couple times even in similar 50ish F temps. I wasn't able to do that at all this time. Perhaps the lower IATs help the engine more efficiently get rid of heat while also making more power? Or perhaps the stock IC was heat soaking, so any airflow through it was getting pre-heated before the radiator (moreso than typical driving conditions). I don't think this is right because a more efficient (for IATs) IC is removing more heat from the charge air... meaning that heat has to go somewhere. Not sure what to think of this. But it feels good and temps are not an issue yet.
The car is now tuned:
-I finally took the plunge with the OS Tuning using Simos Tools. I purchased a tune from 8 Bit Performance (who is on the OS Discord and helps a lot of others out frequently). Currently on V5 (V1 was flashed exactly one week ago today), with V6 waiting to be flashed and logged. Nearing the end just refining timing mostly. He is tuning me VERY conservatively as IMO this car doesn't need a ton of power to be fun... just needs to not feel like a tractor with zero top-end like it does stock. We will see what the difference is come February. I have a stock tune (just unlocked to enable 3E HSL) to flash back to maybe do some back to back testing (though I may wait until May to do this... I'll have 8hrs of open track time at a private event which will be better for testing different things. At some point I plan to take it to a dyno for some actual verifiable numbers.
-I did actually start to play with a tune myself (not flashed to the car though) before realizing I just don't have enough time to dedicate to learning to do it all myself at this time. May fiddle with some in the future. For science.
-My FAVORITE part is the 3E HSL (high speed logger). It is a patch applied to the tune which allows full access to powertrain bus data messages. So now I can log:
- Individual wheel speeds
- Brake pressure
- SAS
- Plus a ton of other stuff engine and trans related.
Here's a couple quick videos going over them real quick. Ignore my stupid voice.
I still haven't dropped the front sub frame. Procrastination may happen until after February. HOWEVER I have a decent reason: I ordered some Superpro poly LCA forward bushings, plus some Audi RS3 rearward front LCA bushings. I really only want to drop the subframe once, so depending on how long it takes for everything to show up, I may delay putting the FSB on until after February.
My schedule this year for track stuff:
Feb 11-12: VIR Full HPDE with Tidewater Sports Car Club (Oak Tree Bowl III) - Registration here
Mar 4: Champcar VIR South 12hr race with Team PistnBroke in an SVT Focus - should be fun. Just signed up today.
May VIR Full: Private track day Friday + 2 day event, hasn't been announced yet.
July-Oct: Not sure yet since a lot of schedules aren't out... but wanting to hit Road Atlanta, Summit Point Main + Shenandoah again.
+Fastivus 2023 whenever that gets announced. It may take care of checking Shenandoah off the list above.
December VIR Full: Also not listed yet.
Basically the plan is to try and do an event every other month roughly, with other stuff going on permitting.
Temp data from VIR:
https://datazap.me/u/derhase/stock-tune-temp-data-track-vir?log=0&data=0-2-4-5-7-8-9-13-15
https://datazap.me/u/derhase/stock-tune-temp-data-track-vir?log=1&data=0-2-4-5-7-8-9-13-15
Pertinent info I got from it:
-DO88 IC heat soaks to about 12F above ambient on the stock tune in a 20min session. Perfectly acceptable. Honestly due to the IAT location, it wouldn't surprise me if it's actually lower than reported because of the sensor/intake getting heat soaked on track. What will be important is checking the delta again once tuned.
-DSG temp is fine and increases slowly throughout the whole session. I'd probably feel comfortable running it to 220F or so.
-Coolant temps not a problem.
-Oil temps don't seem to be an issue. We'll see what happens once tuned. Depending on how quickly it approaches 270F once tuned... I MAY see if it's possible to get away with just doing some massive hood vents. I 100% believe that this chassis' primary cooling problem is airflow. More through the radiator and everything, the better it'll be.
-I was running the heat on speed 2 or 3. Nothing crazy but there was a little extra help there.
-On one of my first days at VIR on stock IC, I was able to get to 270F a couple times even in similar 50ish F temps. I wasn't able to do that at all this time. Perhaps the lower IATs help the engine more efficiently get rid of heat while also making more power? Or perhaps the stock IC was heat soaking, so any airflow through it was getting pre-heated before the radiator (moreso than typical driving conditions). I don't think this is right because a more efficient (for IATs) IC is removing more heat from the charge air... meaning that heat has to go somewhere. Not sure what to think of this. But it feels good and temps are not an issue yet.
The car is now tuned:
-I finally took the plunge with the OS Tuning using Simos Tools. I purchased a tune from 8 Bit Performance (who is on the OS Discord and helps a lot of others out frequently). Currently on V5 (V1 was flashed exactly one week ago today), with V6 waiting to be flashed and logged. Nearing the end just refining timing mostly. He is tuning me VERY conservatively as IMO this car doesn't need a ton of power to be fun... just needs to not feel like a tractor with zero top-end like it does stock. We will see what the difference is come February. I have a stock tune (just unlocked to enable 3E HSL) to flash back to maybe do some back to back testing (though I may wait until May to do this... I'll have 8hrs of open track time at a private event which will be better for testing different things. At some point I plan to take it to a dyno for some actual verifiable numbers.
-I did actually start to play with a tune myself (not flashed to the car though) before realizing I just don't have enough time to dedicate to learning to do it all myself at this time. May fiddle with some in the future. For science.
-My FAVORITE part is the 3E HSL (high speed logger). It is a patch applied to the tune which allows full access to powertrain bus data messages. So now I can log:
- Individual wheel speeds
- Brake pressure
- SAS
- Plus a ton of other stuff engine and trans related.
Here's a couple quick videos going over them real quick. Ignore my stupid voice.
I still haven't dropped the front sub frame. Procrastination may happen until after February. HOWEVER I have a decent reason: I ordered some Superpro poly LCA forward bushings, plus some Audi RS3 rearward front LCA bushings. I really only want to drop the subframe once, so depending on how long it takes for everything to show up, I may delay putting the FSB on until after February.
My schedule this year for track stuff:
Feb 11-12: VIR Full HPDE with Tidewater Sports Car Club (Oak Tree Bowl III) - Registration here
Mar 4: Champcar VIR South 12hr race with Team PistnBroke in an SVT Focus - should be fun. Just signed up today.
May VIR Full: Private track day Friday + 2 day event, hasn't been announced yet.
July-Oct: Not sure yet since a lot of schedules aren't out... but wanting to hit Road Atlanta, Summit Point Main + Shenandoah again.
+Fastivus 2023 whenever that gets announced. It may take care of checking Shenandoah off the list above.
December VIR Full: Also not listed yet.
Basically the plan is to try and do an event every other month roughly, with other stuff going on permitting.
