Vitour P1

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Nov 29, 2024 | 07:09 AM

#21

cvp33

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Melting Slicks

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From: RACE TRACK USA

I read up on all the testing as well and saw the mention of heat issues. More recent tests, less qualitative were stating the opposite. All tests say these have a much stiffer sidewall and don’t rollover in high speed/high G cornering. X25 was complaining about the soft sidewall causing issues with other tires, so the P1 got my attention. If these are in fact a revised compound or engineering, certainly these new sizes should benefit? I ultimately chose the P1’s based on the new sizes, stiffer sidewall and H2H lap times that seem to show a highly capable tire. $1,750 from Phil’s Tire Service and no tax made it an easy decision for me.

Nov 29, 2024 | 07:13 AM

#22

cvp33

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From: RACE TRACK USA

Quote:

Originally Posted by PRE-Z06

Look forward to hearing your feedback.

Apex wheels are on back-order so likely a March event at VIR will be my first experience with them. I also ordered heat cycling to get a bit of a head start.

Nov 29, 2024 | 09:39 AM

#23

PRE-Z06

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From: Fort Worth, Texas

Quote:

Originally Posted by rlhammon

One of the huge benefits of the Vitour is that it *doesn't* overheat and get greasy. Lap times have shown this over and over. The North American representative (Dallas Reed) runs both a C8 Z06 and Eray on these tirees and has reported time and time again how they perform better than the Yoks' when it comes to heat. Wondering where you got your impression otherwise.

Every tire compound has a temperature range and I believe like everything else, there’s a trade off. Meaning if it works well at low temps like the Yok then it doesn’t when it gets hot or if it works better when hot then it doesn’t work as well when cool. Think of it like brake pad compounds, there’s a window where coefficient is highest and there’s not a one size fits all. Having less tread squirm (design/depth) and sidewall flex helps to slow the heat increase, but how much slip angle one drives at plays a factor as well. Also keep in mind the vehicle testing the tire and what size the tire is, the lighter the car isn’t going to stress a tire as much as well as the horsepower plays a factor in how much it can overwhelm the tires if nannies are off. Also the bigger the tire the more thermal capacity, so that should slow the rate of increase down as well I imagine. Just like different tracks are harder on brakes, so are they on tires meaning results always have to be taken with a grain of salt.

Last edited by PRE-Z06; Nov 29, 2024 at 02:43 PM.

Nov 29, 2024 | 11:33 AM

#24

cvp33

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Melting Slicks

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From: RACE TRACK USA

I hated the Toyos for this reason. 200TW tires always have trade offs but the 888’s to me were both heat and pressure intolerant. I’d get 2 laps at VIR and then have to bleed pressure or slow way down to get back in range. NT-01’s and AR-1’s took a ton of abuse and only fell off at the end of a 30 minute session of straight up, red misted, I should-know-better abuse. LOL

Nov 29, 2024 | 01:39 PM

#25

rlhammon

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Joined: Apr 2024

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From: Michigan

Quote:

Originally Posted by kjchristopher

There are discussions from the Vitour camp that the tire has changed since the early tires that Andy got for testing with GRM. He has another test coming up soon and I'm sure the article will show up on GRM very quickly afterwards. Will be interesting to see if the results change.

All of the feedback from people who have run them this past season at both SCCA autocross or Time Trials / Time Attack events have indicated nothing but solid performance for an entire session. Also at a head to head competition in autocross this summer the C8 in class running the P1s never touched his water bottle and I was soaking my RE-71RS after every run to keep them in the happy grip range. I have several friends who have run this tires on track all season, not a one has complained.

I'd run them, except I campaign in SCCA Street class and they aren't (yet) legal in class, but I might run them on the track only on another set of stock wheels (I have a 18/19" setup for autocross). I should be able to win some tires are various events in my area, so if the cost is super low to do it I'll see how it goes and if the SCCA opens up to them for 2026 I'll run them everywhere.

Nov 29, 2024 | 02:53 PM

#26

PRE-Z06

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From: Fort Worth, Texas

Quote:

Originally Posted by cvp33

I was having a conversation with a National Champion recently about heat and psi relationship trying to find the correlation as the starting psi is dependent on when the tire turns on I’d say. The more heat the more psi increases, but target psi is based on maximum contact patch which is based on the weight distribution of the car and tire sizes on each corner. I’ve always said the wear of the tire is a good indication as different drivers will push a car to different levels and the alignment as well as sidewall construction make a difference in how it wears, so choosing a psi that’s going to vary over a wide temp range becomes tricky.

Dec 1, 2024 | 02:32 PM

#27

c6n00bie

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Joined: Jul 2024

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I'm surprised the tire was rated a "D" in terms of wear in the chart above, all the reviews I've been reading have been ranting and raving about them.

Has anyone run these tires on the street? How do they do? Looking to pull the trigger.

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