STX Rules and Setup Questions - Page 242 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

strat61caster · 06-25-2018, 12:42 AM

Like a lot of scca solo rules, the vast majority don't have a dog in the fight and can take or leave the change. At this point I don't care about the weight, but I'd bet I'd be faster if I was properly strapped in and not fighting to keep myself in position, at the very least more consistent.

CoolHandMoss · 06-25-2018, 07:54 AM

Does anyone find that Rivals grip notably better after being heat cycled/scrubbed in? I just ran a new set for the first time and I was a little disappointed and I'm wondering whether I can expect them to be any more impressive at the next event. I've always heard this category of tire needs to be heat cycled when new, I'm just wondering how much if any notable difference there is.

Simmons · 06-25-2018, 06:26 PM

Where are all the STX people for Oscoda Pro?

Simmons

cjd · 06-25-2018, 08:56 PM

Quote:

Originally Posted by CoolHandMoss

Does anyone find that Rivals grip notably better after being heat cycled/scrubbed in? I just ran a new set for the first time and I was a little disappointed and I'm wondering whether I can expect them to be any more impressive at the next event. I've always heard this category of tire needs to be heat cycled when new, I'm just wondering how much if any notable difference there is.

I think that they do improve. I have also found they need a LOT more heat to grip to their full potential.

Launch control at 2800rpm on ~50 run Rivals took till my third run to not spin and require throttle feathering. 180+ run RE71's hooked up first time out and could probably use a higher launch rpm, though outdoor temps were also 10-15 higher and that plays a role in the difference too.

C

CoolHandMoss · 06-25-2018, 10:23 PM

That's good to hear. They felt pretty good but I really had hoped for a little more grip out of new tires. I've just never driven on new rivals before.

cjd · 06-25-2018, 10:43 PM

Quote:

Originally Posted by CoolHandMoss

That's good to hear. They felt pretty good but I really had hoped for a little more grip out of new tires. I've just never driven on new rivals before.

I forgot to mention. Completely different tires on good concrete. Launch control was at 3400 if I remember right, and just a bit of spin off the line on first runs each heat.

steverife · 06-26-2018, 07:09 AM

Quote:

Originally Posted by cjd

I think that they do improve. I have also found they need a LOT more heat to grip to their full potential.

Launch control at 2800rpm on ~50 run Rivals took till my third run to not spin and require throttle feathering. 180+ run RE71's hooked up first time out and could probably use a higher launch rpm, though outdoor temps were also 10-15 higher and that plays a role in the difference too.

C

I don't think that has much to do with heat cycles. RE71R's just launch better, period. I launched them 1k+ rpm's higher on my Spyder.

cjd · 06-26-2018, 08:38 AM

Quote:

Originally Posted by steverife

I don't think that has much to do with heat cycles. RE71R's just launch better, period. I launched them 1k+ rpm's higher on my Spyder.

It is more the change as they get heat in them I find worth noting. Whether that translates to grip in a turn.. It seemed like it, but I only have data for the launches at the moment.

CoolHandMoss · 06-26-2018, 10:12 AM

Do you find that they get better with heat to the extent that you never spray them? Or do they need a spray on hot days on a long course? I certainly have never felt like they got too hot even with two drivers on a hot day, but once they feel very hot to the touch I usually give them a spray to try to keep them in what I imagine to be the sweet spot. I'm much more used to driving on re71's and, before that, r1r's though, neither of which really like to get too hot?

tony_r · 06-26-2018, 12:13 PM

There is no reason to spray the BFG.

tigermack · 06-26-2018, 07:06 PM

Quote:

Originally Posted by tony_r

There is no reason to spray the BFG.

Wish I can say that for the RE71's. lol

ka-t_240 · 06-26-2018, 08:00 PM

Quote:

Originally Posted by CoolHandMoss

Does anyone find that Rivals grip notably better after being heat cycled/scrubbed in? I just ran a new set for the first time and I was a little disappointed and I'm wondering whether I can expect them to be any more impressive at the next event. I've always heard this category of tire needs to be heat cycled when new, I'm just wondering how much if any notable difference there is.

any tire should be scrubbed/heat cycled before compition use to help clear the mold release off the tire.

smg1138 · 06-26-2018, 08:28 PM

For those of you guys running RE-71R's this season, how much camber are you running? I'm currently at -2.8 front -2 rear and think I need more. Rear tire wear has been pretty close to even, but I'm getting noticeable outside wear in the fronts. Going to use my friend's pyrometer next event to check temps, but just wanted to check with you guys to get a general idea.

ka-t_240 · 06-26-2018, 08:34 PM

I am around 3.3F and 2.4 rear

06-25-2018, 06:26 PM	#3377
Simmons Senior Member Join Date: Jun 2012 Drives: 2024 GR86/ 2015 FRS Location: PA Posts: 961 Thanks: 306 Thanked 575 Times in 269 Posts Mentioned: 17 Post(s)	Where are all the STX people for Oscoda Pro? Simmons __________________ 2024 GR86 71 STR/ 2015 FRS 71 STX Sponsors Xero-Limit//Karcepts

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06-25-2018, 07:54 AM	#3376
CoolHandMoss Senior Member Join Date: Jan 2018 Drives: 2013 FRS Location: VA Posts: 305 Thanks: 1 Thanked 87 Times in 55 Posts Mentioned: 0 Post(s)	Does anyone find that Rivals grip notably better after being heat cycled/scrubbed in? I just ran a new set for the first time and I was a little disappointed and I'm wondering whether I can expect them to be any more impressive at the next event. I've always heard this category of tire needs to be heat cycled when new, I'm just wondering how much if any notable difference there is.

06-25-2018, 10:23 PM	#3379
CoolHandMoss Senior Member Join Date: Jan 2018 Drives: 2013 FRS Location: VA Posts: 305 Thanks: 1 Thanked 87 Times in 55 Posts Mentioned: 0 Post(s)	That's good to hear. They felt pretty good but I really had hoped for a little more grip out of new tires. I've just never driven on new rivals before.

06-26-2018, 10:12 AM	#3383
CoolHandMoss Senior Member Join Date: Jan 2018 Drives: 2013 FRS Location: VA Posts: 305 Thanks: 1 Thanked 87 Times in 55 Posts Mentioned: 0 Post(s)	Do you find that they get better with heat to the extent that you never spray them? Or do they need a spray on hot days on a long course? I certainly have never felt like they got too hot even with two drivers on a hot day, but once they feel very hot to the touch I usually give them a spray to try to keep them in what I imagine to be the sweet spot. I'm much more used to driving on re71's and, before that, r1r's though, neither of which really like to get too hot?

06-26-2018, 12:13 PM	#3384
tony_r Senior Member Join Date: Sep 2017 Drives: '15 STX Location: San Jose, CA Posts: 237 Thanks: 10 Thanked 157 Times in 103 Posts Mentioned: 2 Post(s)	There is no reason to spray the BFG.

06-26-2018, 08:28 PM	#3387
smg1138 Senior Member Join Date: Jan 2014 Drives: 2013 Raven FR-S Location: Nashville Posts: 775 Thanks: 968 Thanked 213 Times in 136 Posts Mentioned: 3 Post(s)	For those of you guys running RE-71R's this season, how much camber are you running? I'm currently at -2.8 front -2 rear and think I need more. Rear tire wear has been pretty close to even, but I'm getting noticeable outside wear in the fronts. Going to use my friend's pyrometer next event to check temps, but just wanted to check with you guys to get a general idea.

06-26-2018, 08:34 PM	#3388
ka-t_240 Senior Member Join Date: May 2014 Drives: BRZ Location: Fargo, ND Posts: 973 Thanks: 124 Thanked 328 Times in 237 Posts Mentioned: 1 Post(s)	I am around 3.3F and 2.4 rear

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