Texas mile in march anyone? advice?
- Thread starter brian@p+
- Start date
Thank you Van. That's what I needed to know. 305's would be too wide for my car so it will either be 295's or 285's.
Thanks again,
Phill
FWIW, I ran the mile with 315/35-20 MPSS on the rear of my car. It's 28.7" tall, but you can run 187 mph in 5th at 6,250 rpm on the later cars. 2010 - 2012 have a higher 5th gear ratio. My highest speed was 185.4 mph.
I believe I would have gotten about 5-6 more mph with 28" tires - but they are hard to come by with my 18" wheels. Although I'd like to get 19" wheels, I've already gto two sets of the 18's, so that will be a while. I also know that I left at least 100 RWHP in the engine by not getting it tuned before the event (which was the plan).
https://www.facebook.com/brian.stephenson.963/posts/10151998049436003
This is a video from recent Texas mile. Not pro quality but pretty neat.
This is a video from recent Texas mile. Not pro quality but pretty neat.
Van@RevanRacing
Active Member
Brian before October give me a call and let's discuss technique. You're both doing a good job but I see a couple areas where you could have better stability behind the wheel and inspire more confidence at the Mile. Good work.
to bad no DRs allowed......
I see a 285/45/18 P Zero available - pricey... 28" tall, about the only one I could find after 10 mins of looking.
[/QUOTE] I see a 285/45/18 P Zero available - pricey... 28" tall, about the only one I could find after 10 mins of looking.[/QUOTE]
Holy smoke - did I really see these on TR for $556. Yikes!
Holy smoke - did I really see these on TR for $556. Yikes!
Agree...
Two teams went out with them setup incorrectly (rim width/tire pressure), and had "incidents". Mile tried to get said tire manufactures to give them a letter stating it was ok to run them. Of course the attorneys wouldn't oblige for liability reasons.
They should be legal... but mandatory with double bead-locks.
Anyone that disagrees should investigate how tires receive their speed ratings and how torturous the test are (how long they run the test, how much they load the tire, how much heat they generate)... if they still disagree after that then they should check out all the drag cars running 4.10's to the 1/8 at over 194mph and 6.50's at almost 230mph in the 1/4 on drag radials. Way more torture than the mile track puts them through.
Granted they run longer at the mile and this builds more heat than 1/4mile. Tire failures are typically from overheating the belts at the edge of the tire. A good friend of mine used to be head of motorsports for x tire company... through him I spoke to engineer that designed x drag radial at x tire company. In depth discussion about drag radial construction followed by where to measure the temps and what the limits were... followed by testing said radials at the mile over 200 before they were outlawed. Temps were well within safe ranges at 25 psi and a little over 200mph.
I'd like to see more guys battling to get DR's back but with a dual bead lock requirement.
Just my $.02
Cheers
Double Bead-locks keep the bead from being unseated at high speed from the centrifugal forces on the tire. At high speed, especially with lower tire pressures and wider rims, the centrifugal force is high enough to grow the center of the tire to the point that it unseats the bead of the tire from the rim. At this point the tire looses pressure and a chain effect of ugly things occur. *Note* All fast DR drag cars are dual or, at min, single bead lock cars.
It has the added benefit of prevent tire/rim slip too but it's mainly there to keep the bead "seated" to maintain tire pressure at high rotational speeds.
Cheers
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