Question about track setup for type R

Dave B

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With regard to tires, it is all about heat cycles. I run RE-71's on my Subaru BRZ and they never lasted for me longer than 5 days (or 20 hpde sessions), including driving to and from the track. And by "lasted" I mean they cycled out and lost grip. I would expect a similar lifetime on the Type R.
Agree that the number of heat cycles is a big determinant of grip. Hoosiers don't stand many of them but can still last a while for long races. In Champcar, most of the competitors I know are not happy with RE 71Rs as they fall off more rapidly than the more constant (but slower ) RS4 Hankook. If you want a tire that can last through a lot of heat cycles look at the Nitto NT-01. Old tech and not that fast but easy to drive and consistent. The 275/40-18 according to Discount tire is about 25.5" tall which means it will likely fit. My experience with these tires are that they likely fit small in general.



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willskiGT

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RE-71R is a cheater Auto X tire. It's actually quite a bad track tire because the optimal temperature range is so narrow. They have incredible grip but go greasy after just a few maximum attack laps.

I've posted this in a ton of threads, but right now the best semi-track tire is the Cup 2. Dirt cheap right now in the OEM fitment. https://www.prioritytire.com/michelin-pilot-sport-cup-2-245-30r20-zr-90y-xl/

OP, to answer your question, the stock pads are not up for a 30 minute run at maximum attack. I can't do more than 6-7 fast laps at AMP (home track - lap times are in the mid 1:30s and it is not a heavy braking track) before getting some pretty gnarly fade. Car still stops but the braking distance begins stretching out after lap 5 or so.

If you run the heater on max, the car generally won't go into overheating / limp mode during a 20 minute session (haven't run longer than this due to brakes), even in hot weather (90F with 85% humidity). However, the coolant temps will get quite high, and the gauge (at least on the 2019s) does not provide any actual numbers, nor does it provide oil temps, so you may be cooking the oil.

The stock tires will roll over onto the sidewall and also horribly overheat if you are driving hard. Even if you overinflate, you can't fully stop the rollover, and overinflating them makes them get greasy even faster. You have to be very careful once they become greasy, because the resulting understeer will shred the sidewalls and tread. My stock front right (counterclockwise circuit) was absolutely cooked at just 2700 miles because of this phenomenon.
 

battledog

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Which tow hook should I get? Almost got the one from Perrin until I saw it is a cosmetic addon that shouldn't be used for towing. :eek:
 

ca86108

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Go for it, the CTR is great track car and totally livable the rest of the time.

I tracked mine 5-6x last year with only swapping the OEM brake fluid. The stock pads do pretty good - not the best, but you dont have to take them off right away.

Get the car, and have fun - its an absolute blast on track, totally its element.

Do you have to eventually get stainless steel brake lines since you put high temp fluid? How many track days did the oem pads last with stock pads? Any brake fade with the oem pad + high temp brake fluid combo? Thanks
 

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Do you have to eventually get stainless steel brake lines since you put high temp fluid? How many track days did the oem pads last with stock pads? Any brake fade with the oem pad + high temp brake fluid combo? Thanks
I know users have reported some fade with the OEM pads (2017-19). The 2020 pads are different though to help address the issue. I'm not sure how those would fare. Many just end up going with a dedicated track pad and swap back after the track session.
 

ca86108

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I know users have reported some fade with the OEM pads (2017-19). The 2020 pads are different though to help address the issue. I'm not sure how those would fare. Many just end up going with a dedicated track pad and swap back after the track session.

I just got my car yesterday. It only has 10k miles so I wanted to burn those out before going to a dedicated track pad. I just wanted to know if theyd last me 1 or 2 track days with stock fluid or should I put high temp fluid etc.
 

Dave B

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Good brake fluid is almost always worth it for track use. (waste of time on the street). Personally I love Castrol SRF. It really is better
 

willskiGT

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I just got my car yesterday. It only has 10k miles so I wanted to burn those out before going to a dedicated track pad. I just wanted to know if theyd last me 1 or 2 track days with stock fluid or should I put high temp fluid etc.
Depends on the track, session length, etc.

My stock pads were okay for 20 min sessions at Atlanta Motorsports Park, which is actually pretty hard on brakes since the speeds are low (minimal cooling) and there are 3 fairly heavy braking zones in the first third of the lap. The problem is not the stock fluid, it's the pads.

If you're going for longer sessions, you probably need to upgrade pads and fluid, but that could be offset by better cooling or less demanding braking zones. In all honesty, the stock tires will give out long before the brakes do. My pedal got a little long towards the end of my 20 min sessions, but the braking distance was generally the same. However, the stock tires shredded their sidewalls down to the cords in just 40 minutes total.

I now run PowerStop trackday pads and SRF fluid with Michelin Pilot Sport Cup 2 tires. No issues on track or street (except some very light squealing when cold).
 

ApexEight

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Depends on the track, session length, etc.

My stock pads were okay for 20 min sessions at Atlanta Motorsports Park, which is actually pretty hard on brakes since the speeds are low (minimal cooling) and there are 3 fairly heavy braking zones in the first third of the lap. The problem is not the stock fluid, it's the pads.

If you're going for longer sessions, you probably need to upgrade pads and fluid, but that could be offset by better cooling or less demanding braking zones. In all honesty, the stock tires will give out long before the brakes do. My pedal got a little long towards the end of my 20 min sessions, but the braking distance was generally the same. However, the stock tires shredded their sidewalls down to the cords in just 40 minutes total.

I now run PowerStop trackday pads and SRF fluid with Michelin Pilot Sport Cup 2 tires. No issues on track or street (except some very light squealing when cold).
Have you noticed greater stopping power and less fade with the Track Day pads and are you running them front and rear? How's the dust? Is SRF overkill for street? Cheers from Sandy Springs!
 

willskiGT

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Have you noticed greater stopping power and less fade with the Track Day pads and are you running them front and rear? How's the dust? Is SRF overkill for street? Cheers from Sandy Springs!
Front and rear. Stopping power is maybe a little greater - I didn't notice a large difference in braking point on track or anything. Maybe 2-3 feet shorter stops. However, they have great bite and feel when up to temp, as compared to the stock pads which feel worse and worse the hotter they get.

Dust is a bit heavier than OEM and I would guess the dust is more corrosive to the wheels than the OEM pads. I try to rinse the wheels off weekly and I wash the car on average every other week.

SRF is expensive (I got mine for $68 for the 1L bottle, it's now around $90 at most suppliers because of Castrol's production schedule), but you can go 18-24 months without changing it because of the ridiculously high wet boiling point, as opposed to other racing fluids which really should be changed every 6 months or so.

If you compare SRF to something like Motul RBF660, SRF is actually a better deal because it lasts longer and is a 1L bottle, rather than 500mL. RBF660 is ~$30 a bottle and you need 2 bottles, so you're at $60 and you need to change it 3x as often.
 

MadMage

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Thanks everyone for the info. I have a line on a polished metal 2020 through a dealer with what was a March build but who knows with the virus shutdown.
Did you end up getting this out of Arizona? I was talking with one dealer about one and the sales guy didn't know the fleet manager had sold it to someone in WA.

Ended up getting one from a different dealer. Just curious :)
 








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