GR Yaris GR Yaris at racetrack

Question on Tyres. Still running stock suspension and no plans currently to upgrade to anything stiffer (as I do like the weight transfer of the car).
Anyone using Nankang NS-2R for their GR Yaris? I think it would be tempting option for more track focused driving?
As an assumption I believe AR-1 will be too grippy for stock suspension which could eventually lead into weird situations in high speed corners (exxagerated issues when lifting throttle, etc.?).

Finnish Endurance Racing series use NS-2R as a single type tyre and it seems to be rather robust and durable tire for fun driving. Not as fast as AR-1, but likely better than PS4S on race track.


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Go to tyre for track rentals and almost identical to the popular AD08 when it was still available, a great replacement being a lot cheaper...
 
For the people running Nankang AR-1's on track. What are you finding as the sweet spot for hot temps?
 
fitzer said:
For the people running Nankang AR-1's on track. What are you finding as the sweet spot for hot temps?
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I've never felt like I've got them too hot tbh. 255 that is. Anytime I point the heat gun at them I'm not seeing much north of 85. More often low 70s in the UK
 
OT But CTR at NürbR. Nice turn in but very stiff setup. GR feels like a Cadillac when comparing to that hopping.
 
First track session for this year also First outing with NS2R on track.
First impressions on tyre on tyre thread.

Was impressed how brakes now work (as braking feel) - overall how brakes tolerate heat not so impressed - even though I have additional cooling + proper brake pads, and did not drive that many hot laps, got smoking brakes after last stint when returning to pits. I feel the stock disc of GR Yaris is maybe undersized as if you look of its dimensions it should be big enough for hard driving, but honestly my old racecar had better brakes (300mm, single piston) than what GR Yaris has.

Due to grip issues didn't get very good feeling with the car but was overall fun day to do few fast laps.
Traffic was quite heavy so had only two clean pushes. I felt track mode was fastest at least with this tyre combo (was not so happy on how front end gripped).

It was 27'C ambient and oil temps were 120-125'C with oil cooler, water peaked at 100'C so looks the cooling is sufficient for occasional blasting.

Did 5-10min easy drive around local roads to cool off the car after each stint and feel it was a good way to drop temps after hot laps, both for the brakes and for the engine.
 
Speed Engineering GmbH is a german company which optimizes cars for trackuse. They made a video about brakes a few days ago. In this video they recommend stock discs for the Yaris (and the GR86) with Endless N39s brakepads for cars which are mainly used on the track or the new Endless MX87 for cars which are used on normal streets and sometimes on track. In these combinations the discs seem to get no heat cracks.

They developed a brake cooling kit for the Yaris. So if you are not happy with your current one maybe its worth looking at this one.
Here you have a mounting manual for it.
 
KimmE_GR said:
... the new Endless MX87 for cars which are used on normal streets and sometimes on track...
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Anyone have any further feedback and/or insights on the Endless MX87, please?

Also, on how these compare to OEM pads on the grounds of:
  • price
  • value for money
  • wear they cause on OEM discs
Thanks
 
Michael Knight said:
First track session for this year also First outing with NS2R on track.
First impressions on tyre on tyre thread.

Was impressed how brakes now work (as braking feel) - overall how brakes tolerate heat not so impressed - even though I have additional cooling + proper brake pads, and did not drive that many hot laps, got smoking brakes after last stint when returning to pits. I feel the stock disc of GR Yaris is maybe undersized as if you look of its dimensions it should be big enough for hard driving, but honestly my old racecar had better brakes (300mm, single piston) than what GR Yaris has.

Due to grip issues didn't get very good feeling with the car but was overall fun day to do few fast laps.
Traffic was quite heavy so had only two clean pushes. I felt track mode was fastest at least with this tyre combo (was not so happy on how front end gripped).

It was 27'C ambient and oil temps were 120-125'C with oil cooler, water peaked at 100'C so looks the cooling is sufficient for occasional blasting.

Did 5-10min easy drive around local roads to cool off the car after each stint and feel it was a good way to drop temps after hot laps, both for the brakes and for the engine.
Click to expand...
Would you be interested in trying our offerings for the GR Yaris? We have two piece rotors and a variety of track pads, from the BlueStuff hybrid street pads to our RP Series RP-X or RP-1 track pads I think you will find something you like.

 
wow.... there's a thing @EBC Brakes , notice you saying RP pads can now be used on road where before were strictly for track
 
EBC Brakes said:
Would you be interested in trying our offerings for the GR Yaris? We have two piece rotors and a variety of track pads, from the BlueStuff hybrid street pads to our RP Series RP-X or RP-1 track pads I think you will find something you like.

Click to expand...
Thanks for the offer - already running your RP-X pads but always willing to test more! So far have been really happy with their performance and with Endless fluids they're quite perfect in terms of feel and grip.
Disc should still be in good shape, need to think for options when the current ones wear out (should last few. years still).
 
Just to summarize then NS-2R - grip is okeyish but the thing I miss most is the good feel for the car's front in turn in. As it is little bit vague in terms of available grip, it takes away the confidence to push. Maybe its the pressure and also front camber related issue.
I'm quite sure I was not in optimal temps for the tire also so there is room to improve. .
 
Yaris San said:
wow.... there's a thing @EBC Brakes , notice you saying RP pads can now be used on road where before were strictly for track
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Sorry you may have misunderstood, Michael Knight was using on track, I wasn't suggesting for the street. However, they are perfectly capable of any street use it is just in the UK and EU the laws are strict and forbid it, in North America people do and there are no issues.
 
Michael Knight said:
Thanks for the offer - already running your RP-X pads but always willing to test more! So far have been really happy with their performance and with Endless fluids they're quite perfect in terms of feel and grip.
Disc should still be in good shape, need to think for options when the current ones wear out (should last few. years still).
Click to expand...
You describe the pads as smoking and unimpressive to heat, did this cause fade on the track? or did they still feel good throughout, even with the smoking and excessive heat? I wonder if upgrading the rotors would alleviate this heat issue. we appreciate the feedback, as always :)
 
EBC Brakes said:
Sorry you may have misunderstood, Michael Knight was using on track, I wasn't suggesting for the street. However, they are perfectly capable of any street use it is just in the UK and EU the laws are strict and forbid it, in North America people do and there are no issues.
Click to expand...
ah ok, was confused with this schematic which must be in ref to US market

Screenshot_2023-05-18-03-49-48-30_40deb401b9ffe8e1df2f1cc5ba480b12.webp
 
EBC Brakes said:
You describe the pads as smoking and unimpressive to heat, did this cause fade on the track? or did they still feel good throughout, even with the smoking and excessive heat? I wonder if upgrading the rotors would alleviate this heat issue. we appreciate the feedback, as always :)
Click to expand...
Pads are fine no performance issue in that part
 
I absolutely love the the RP-1 one best pads have used in last 20 odd years and have tried every top range pad on large range of vehicles, reasonable kind to disc, dust not too excessive, wear rate is bit on hi side but happy to replace to benefit from outstanding retardation
 
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