[TPR] C8 Z51 at NORC

[Owen Lee Green]

Yeah a tire that would live up to our open road racing expectations. With
less likelihood of failure at extreme speeds.

On Fri, May 26, 2023, 2:56 PM Asa Jay Laughton <asajay at asajay.com> wrote:

> I like that idea.  :)
>
> Asa  Jay
>
> Sent via radio waves
>
> On May 26, 2023, at 12:51, Owen Lee Green <oneeyez4263 at gmail.com> wrote:
>
> 
> Be nice if tire manufacturers would come up with a Z2R spec. Tire would
> have to handle 220 on a shifting dyno for an hour.
>
> On Fri, May 26, 2023, 12:48 PM DENNIS ANTENUCCI via TPR <
> tpr at teampanteraracing.com> wrote:
>
>> Great analysis Larry. Thanks for sharing with us!
>>
>> Notice my or Macs FYI….that no one including me is “recommending” any
>> tire or air pressure recommendation.
>>
>> Yous Pays yo money and take yo chances although I will personally NEVER
>> run anything less then a Y rated performance rated tire.
>>
>> Dennis
>>
>>
>>
>> Sent from my iPhone
>>
>> On May 26, 2023, at 11:28 AM, Larry Stock <larrys at panteraparts.com>
>> wrote:
>>
>> 
>>
>> SSC is not a road handling or touring around town event, it is a straight
>> line speed event. The theory is that higher pressures keep the tire rounder
>> with less sidewall flex. Sidewall flex means more frictional heat buildup.
>> Too much speed and heat leads to tire failure. With that in mind that over
>> the past 20 years, the tires put on your cars today have about half the
>> sidewall, thus probably less than half the sidewall flex. I found 37 to 40
>> PSI in my /35 series tires gave me max adhesion verses my /50 series tires
>> at 22 to 27 PSI for road course applications. So there is some truth in all
>> that is being said, but try not to generalize the statements as one fits
>> all vehicles or applications. Now let’s not talk truck tires
>>
>> Larry
>>
>>
>>
>> *From: *TPR <tpr-bounces at teampanteraracing.com> on behalf of DENNIS
>> ANTENUCCI via TPR <tpr at teampanteraracing.com>
>> *Reply-To: *DENNIS ANTENUCCI <teampantera at yahoo.com>
>> *Date: *Friday, May 26, 2023 at 11:01 AM
>> *To: *Bjoern Flesland <bflesland at gmail.com>
>> *Cc: *team pantera racing <tpr at teampanteraracing.com>, Asa Jay Laughton <
>> asajay at asajay.com>, David Carpenter <davecarp80138 at outlook.com>, Mark
>> Darius Frank <markdariusfrank at gmail.com>, Paul Katchadourian <
>> paul at katchenvironmental.com>, Russ Russell <russrussell854 at gmail.com>, <
>> laurieferrari at aol.com>
>> *Subject: *Re: [TPR] C8 Z51 at NORC
>>
>>
>>
>> Mac ran owners manual pressures which is exactly what the C8 Z51 sticker
>> reecommends.
>>
>>
>>
>> My 25 year ORR history of running higher temps was based on a couple
>> Goodyear and BFG tire engineers who recommended using higher inflation
>> pressure based on tire failures they had data onin endurance events.
>>
>>
>>
>> While Eric (Tire guy) now a Pantera owner confirmed the official
>> recommended tire pressures he also lost a tire last Sept. 😂😂
>>
>>
>>
>> Dawg
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Sent from my iPhone
>>
>>
>>
>> On May 26, 2023, at 10:49 AM, Bjoern Flesland <bflesland at gmail.com>
>> wrote:
>>
>> 
>>
>> Hi Dennis,
>>
>> What does it say in your owners manual and on the car tire sticker
>> regarding tire pressure?
>>
>> The cold pressure increases approx 4 psi when measured hot, immediately
>> at finish line.
>>
>> I’ve seen a difference between 3 and 5 psi.
>>
>> It probably also depends on your speed, IMO.
>>
>> Cheers Bjoern 🏁
>>
>>
>>
>>
>>
>>
>>
>> fre. 26. mai 2023 kl. 19:35 skrev Mad Dog Antenucci <
>> teampantera at yahoo.com>:
>>
>> Only concern I have is on tire pressures Mac ran...but those lower air
>> pressures worked for him and may work for others. For 25+ years of ORR'ing
>> I have always
>>
>> run  +/- 38-40 Fronts and 42-44 psi rears in the Pantera.  But the C8 is
>> also a much heavier vehicle.
>>
>> Thoughts, questions  or comments?
>>
>>
>>
>> Dawg
>>
>>
>>
>>
>>
>> On Friday, May 26, 2023 at 10:16:25 AM PDT, Asa Jay Laughton <
>> asajay at asajay.com> wrote:
>>
>>
>>
>>
>>
>> Nice!
>>
>>
>>
>> Asa  Jay
>>
>> Sent via radio waves
>>
>>
>>
>> On May 26, 2023, at 10:03, DENNIS ANTENUCCI <TEAMPANTERA at yahoo.com>
>> wrote:
>>
>> 
>>
>> No Pantera content here…so only copying you few because you either have a
>> vette or are considering one in the future.
>>
>>
>>
>> Malcolm “Mac” Johnson shared with me his C8’s vitals below at the NORC
>> last Sunday.
>>
>>
>>
>> BTW, MAC BTW uses hand timer won 1st place. In fact Mac usually wins his
>> class.
>>
>>
>>
>> Dennis
>>
>> Sent from my iPhone
>>
>>
>> Begin forwarded message:
>>
>> *From:* Malcolm Johnson <mjohnson2003 at comcast.net>
>> *Date:* May 25, 2023 at 11:17:00 PM PDT
>> *To:* DENNIS ANTENUCCI <teampantera at yahoo.com>
>> *Subject:* *C8 run*
>>
>> Well I must say I’m pleasantly surprised about my C8 cooling.   My C6Z
>> always runs 195-210 while cruising to Vegas at 100 degrees and 80-90mph.
>>    The new car runs 174-176 degrees at 100 outside temp.   At race speeds
>> 140-162mph, all temps come up to the 180s.  I’m talking coolant, oil, and
>> tranny.     The last 10 miles running higher rpm’s in a lower gear to
>> lessen speed variation pushed temps to 190.    The only time I saw 200 was
>> after slowing down to a crawl.   All in all, it runs cool across the board.
>>     Regarding tires, I talked to Eric P and aired up the tires to about
>> 33-34 cold.   At speed the tires were 39-40 pounds but the temp stayed
>> green “Normal “.    No issues at all.
>>
>> Mac
>>
>> Sent from my iPhone
>>
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>
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