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Race tires: new or worn?

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Started by Flyntgr , 07-20-2011 08:58 PM

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#1
Flyntgr
Posted 07-20-2011 08:58 PM

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I don't know which is faster: new tires with 4/32 shave or used tires, same size and origin, but with less rubber left? What do YOU think? Any proof or circumstantial evidence to support your belief? Thanks!

#2
Ron Alan
Posted 07-20-2011 09:50 PM

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Rotational mass...the less you have the faster. But at some point heat cycles and the amount of rubber(or cord!)left will be a factor(grip) that offsets weight. I think Drago recently posted liking a 1/32nd tire... basically the window RA1's performed best? Please correct if my memory is wrong.

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#3
Keith Novak
Posted 07-20-2011 10:35 PM

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Depends on the track. Some seem to like fresh new tires. Others like older harder tires.
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#4
Mike Collins
Posted 07-21-2011 06:18 AM

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Depends on the track. Some seem to like fresh new tires. Others like older harder tires.


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#5
Den
Posted 07-21-2011 07:01 AM

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What category does Mid-Ohio fall into?

#6
Tom Hampton
Posted 07-21-2011 07:11 AM

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Http://www.mazdaracers.com/index.php?showtopic=1037&view=&hl=&fromsearch=1

The above suggests a heat cycled tire.

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#7
Qik Nip
Posted 07-21-2011 07:44 AM

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What category does Mid-Ohio fall into?



It likes a well worn RA1. I qualified what had been a 3/32 set from last season on cycle #20 at 1:44.6 last weekend. The LF was corded when I came off the track.
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#8
James York
Posted 07-21-2011 08:59 AM

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I don't know which is faster: new tires with 4/32 shave or used tires, same size and origin, but with less rubber left? What do YOU think? Any proof or circumstantial evidence to support your belief? Thanks!


Reggie,

It is track dependent. MSRH for example wants quite a bit different tire than say, TWS.

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#9
Flyntgr
Posted 07-21-2011 09:20 PM

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I'm running circuit grand bayou in Louisiana, 1.8 miles, rough surface, 14 turns. My RA1s crap out in 20 minutes, with 10 more to go. I'm running other makes of cars, including a Porsche 944 2.7 with S2 heads and a Cobra Mustang with 305 ponies, in a summer series where everyone runs together in one class. So I'm looking for a tire advantage so I can run the entire 30 minutes without slowing down. We reach speeds of 110 mph or so. Any suggestions? Hoosiers, Hankooks, B.F. Goodriches? Thanks, everyone. I'm trying to use 115 h.p. to beat guys with lots more h.p. than I have, so I can only do it by staying out front in the curves so their speed can't scoot them by me on our long straight-away.

#10
dmathias
Posted 07-22-2011 06:28 AM

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