I think it'd be worth some time to develop an actual test protocol. The goal is to validate number of sessions before grip degradation. That to me would best be done by having a pair of highly consistent drivers doing back to back runs on brand new unshaved tires, brand new 2/32s tires, and something like 8 and 12 heat cycle tires that started life unshaved. Obviously the driver should not be allowed to know which set they are driving on.
We used a back to back in one session test like that to validate the grip impact of 225s back in the day when we were trying to figure out how to slow down the S197s.
Al Fernandez
I talked with Jerry and we are willing to help out the group and be the test drivers.
Some of this is funny to me as how involved the test has to be. Funny because in my mind I want to think we did a huge (sarcasm) tire test during the 888 debacle I think with Proctor doing back to back sessions on different tires and then the determination was made. Seems similar to the way I remember some rules being changed based upon one race at ECR with data only comparing two cars. Yet now we have to have a Nascar level tire test?
Bryan Leinart
CMC #24
We don't have to...we could just shoot from the hip.
Al Fernandez
We can actually make this happen.
As far as I know, Josh is running in a set of sticker RT615K+ at MSRH this weekend and will have those with him at MSRC. I'm bringing a set of sticker RT615K+ to MSRC with me and plan to use them for a portion of the friday test and saturday warm-up and TT sessions.
We could make Josh put on a blindfold and 'change' his tires friday and have him go run a session, then come back and we'll 'change' his tires again and not tell him what we're putting on. IE -- may not have put stickers on etc. Would be close to a blind eval and I think he is consistent enough to make it a reasonably successful test and it won't be his first session ever on those tires.
Also -- in line with my original proposal, I will run them in friday practice (4 sessions-ish), saturday warmup, sunday warmup, and then maybe we'll do an AIX Race 4 Sunday for the street tire cars to evaluate how the tires 'race' to be sensitive to the other potential issues that are out there.
Daniel Records
CMC # 34
Personally I would think we'd want to spend a bit of time simply driving on these (and building heat cycles) and optimizing setup before thinking we're ready for a test. I would be surprised if we did not find that they require different alignment, pressures, and spring/damper settings to work well.
Al Fernandez
Lots of discussion going on, glad to see that. Ideas are all over the map, at least we're having the talk!
The weather this weekend isn't looking great, so I'll at least get to text azenis as rain tires
Got em mounted, I'm wondering if they'll rub more than the RRs.
20190227_111347.jpg
- Josh
Last edited by Sook; 02-28-2019 at 01:03 AM.
CMC #50
All that setup work (specific to Josh's car, anyway) is planned for this weekend. That's assuming the weather plays nice. The forecast is all over the map and changing every time I look. If the weather holds out, we will have a full weekend of setup and heat cycles on his tires with the stickers still on mine. If the skies open up, Josh's won't have as many effective cycles on them and mine won't be stickers anymore...
Richard P.
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