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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
I’ve got the next two days at Watkins Glen to log Celica. Any specific data or situations that would be helpful just let me know. Car feels great and temps are supposed to start in the 40’s and get up to high 50’s. Dense cold air FTW.
Oooh nice, how many runs of yours are we allowed to sacrifice in the name of M156 science? I've got a couple of (boring) tests for you. It's just a shame that the ODB things don't offer knock detection etc
I'll have a think about it today and get back to you later when I'm with my laptop. Cellphone FTL.
Also...do you have a pair of either smaller, narrower or lighter front wheels?
Yeah, as Skratch said, back to back pulls with the airboxes would be the first bet. I'd take the airflow readings with a pinch of salt though, because the bluetooth logger isn't entirely accurate all the time (even with a 0.1s refresh rate) there's a chance that the peak figures (or even the set of data from 5000-fuel cut) might not be entirely faithful, esp seeing as the peak figure on his last outing was 368g/s. If it was a drag strip, i'd have been more interested in seeing if the results from Superlubricty years ago are able to be replicated (ie, 1 tenth and 1mph).
Other than that, I'd have been interested in knowing how many mph it's worth to have narrower wheels, but I suppose that's not applicable for now either due to not being on a dragstrip. I'm going to be buying some lighter wheels soon (after my game-changer mod soon) and probably a slightly narrower width on the front, but it'll be a small reduction (going from 8.5" to 8.0")....Granted 'skinnies' on the front no doubt help with higher trap speeds, I was just curious to see if a slightly narrower wheel compared to stock would make any meaningful difference
If you want to be nice still.....perhaps just log your first laps when air and engine temps are what you'd consider to be 'cool' for what's normal in your climate. Then perhaps log after it's either heat-soaked or running high IATs after sitting idle for a bit. I'd just like to know how much timing your particular tune wants to pull when the engine is running hot/breathing hot air.
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Nope. Didn’t log anything. Too busy with like 3 other things connected to my iPhone. Car ran like an absolute monster. The TBs have made a huge difference in midrange and low-end torque, coming out of corners it’s very noticeable.
2:08 best lap and consistent 2:10-2:12’s. Almost 1.5g’s cornering. The wing made an enormous difference. It’s just so planted and stable now, goes exactly where I want it to go and the understeer is gone. It’s a dream to drive on track, not so much fun on the street anymore.
But I had some major issues today. I’m starting to break weird stuff and need to really rethink what I’m doing with this car because it’s getting dangerous with how fast it’s capable of going. I’ve basically found the limit of Mercedes engineering, maybe Michelin too. More later, it’s been a long day but I’ll leave this here for now...
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by Jasonoff
What's the load index on those tires?
More than enough. 96Y(XL) means it should be good to 1565lbs (on that corner) and 186mph, in addition to being extra reinforced (XL). I’m going after Michelin. That should never happen.
More than enough. 96Y(XL) means it should be good to 1565lbs (on that corner) and 186mph, in addition to being extra reinforced (XL). I’m going after Michelin. That should never happen.
Yeah, no way should that have happened. Unless you were continuously smashing the concrete apex strips?
Not specifically directed at you, but this is why safety equipment is so important. You can never anticipate mechanical failure but you can hopefully at least be prepared for it.
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by Celicasaur
Pissed.
Cup2 tyres?
Yup. Sorry for the hijack here but I had a good excuse for not logging.
The TBs made a big difference though. Massively better torque down low which is exactly what I needed.
Originally Posted by Jasonoff
Yeah, no way should that have happened. Unless you were continuously smashing the concrete apex strips?
Not specifically directed at you, but this is why safety equipment is so important. You can never anticipate mechanical failure but you can hopefully at least be prepared for it.
This is why I go over my car before every run. And why I have all sorts of safety equipment. I think a full cage is next and def dedicated track wheels.
Yes I was smashing the rumble strips but that’s what they’re made for.
Yup. Sorry for the hijack here but I had a good excuse for not logging.
The TBs made a big difference though. Massively better torque down low which is exactly what I needed.
Hijack away, I'm happy to read/discuss anything half-interesting regarding actually racing/modding our cars, rather than a lot of the other threads I see.
If you want more low down torque and more snap on initial throttle tip in, you need a custom VVT tune. I'm sure you'll get it done eventually and love it. I find that I'm driving my car more 'gently' nowadays (ie, not revving much above 3000-4000rpm for a fun (but not fast) drive) because the low down response is so much better than before now.
It's a pity that information about the bigger throttle bodies and the ability to properly tune an M156 to the max wasn't available a few years ago. Still, i suppose at least it means the marque still has the ability to mix it with the big guns in the era of newer turbo cars (well, sort of).
Little update on running more aggressive tune.i ended up going back to my old 93 oct tune with 25d max timing.
on 30d 104 oct tune and 93 fuel the car ran hot! I mean really hot and would hit 201 engine coolant temps really easy and engine oil temps were a solid 10d higher.
Little update on running more aggressive tune.i ended up going back to my old 93 oct tune with 25d max timing.
on 30d 104 oct tune and 93 fuel the car ran hot! I mean really hot and would hit 201 engine coolant temps really easy and engine oil temps were a solid 10d higher.
10whp is not worth it and back to old file
I'm assuming this was meant to be posted in the other thread...
Without wanting to sound mean though..why would you run 93 octane fuel on a tune designed for 104 octane...? Or have I missed something here..?
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by Celicasaur
BLK....the airbox...don't suppose you took comparison pics of the neck vs the oem y-pipe did you?
What do you need to see exactly? I’m going to be taking it off again next weekend and can take pics. It’s completely different (angle/slope, tube shape, length, etc) but will be hard to capture in pics.
Yeah, i figure it would be hard to capture, but like more of a figurative comparison would be nice if you can spare the time, ie both of them from birds eye view, both of them from a square-side angle, both of them directly inside etc etc
It'll be impossible to gauge the angles and exact contours from the pics, but i'm just keen to understand what's different enough to yield the 1mph that Superlubricity wrote about years ago. Desperate to get as close as possible to a car capable of a ~127 trap speed somehow.
04-22-2018, 08:27 PM
