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hoosier 'A' compound or 'R' and versus v710?

Old 09-10-06, 06:34 PM
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hoosier 'A' compound or 'R' and versus v710?

this is all about autocross.

i would like to get v710's but i only have 1 more race in 2 weeks. but i heard that having tires sit over winter is never as good as starting a new set fresh at start of season. true?

also, which is more appropriate for my rx7 for autocross domination? the A or the R hoosier? 2730 lbs and 400 rwhp. i would think the A but never used hoosiers before.

which are faster? v710 or hoosier? i hear the new hoosier A6 is just as fast, if not faster, than the v710? any hard data out there? which lasts longer too? i'd do 8 events with a co-driver.

fyi...i'm not a noob. have been ax'ing for 8 years and am an instructor at my club (www.motorsportsne.com). always used v700's.
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Old 09-10-06, 06:49 PM
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GRM just did a write up in last month's issue. They said the kuhmo's like slip angle more, whil the Hoosiers muscled the car around. They are both equal in performance in their opinion, using a Mini as a test mule if I recall correctly. but the Kuhmo's are cheaper.....
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Old 09-11-06, 08:52 AM
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Originally Posted by 2MCHPWR
i would like to get v710's but i only have 1 more race in 2 weeks. but i heard that having tires sit over winter is never as good as starting a new set fresh at start of season. true?
True. Tires that have been used at all and then stored for a long period are never as good as fresh ones.

Originally Posted by 2MCHPWR
which is more appropriate for my rx7 for autocross domination? the A or the R hoosier?
For autocross always the A model. They're designed for autocross and heat faster.

Originally Posted by 2MCHPWR
which are faster? v710 or hoosier? i hear the new hoosier A6 is just as fast, if not faster, than the v710?
What I've seen in SS is everyone testing the A6 and then switching to them. Most of these guys had run the V710 the past few years but the Hoosier A6 is slightly faster IMO. The trend in all the national events this season has seen the faster rwd classes move from the V710 to the A6. I think you'll see the A6 edge the V710 out at Nationals this year unless the new asphalt surface there doesn't allow the A6 to show it's slight advantage.

I read the Mini article too but the Mini is a "slow" fwd car Every SS, ASP, BSP etc car I've seen switch from the V710 to the A6 got slightly faster. On the other hand the V710 is still an excellent tire and very competitive, is cheaper than the Hoosier and has a longer useful life (though I still wouldn't store them over the winter).

Last edited by DamonB; 09-11-06 at 08:56 AM.
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Old 09-11-06, 01:16 PM
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I thought the trend towards the Hoosiers was due to lack of availability of the V710s.
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Old 09-11-06, 11:06 PM
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I think the real question is have you driven on race tires before?
If not, go with the 710s they will give you some room to be a slight be rough in driving.
If you are very, very percise then maybe the Hoosier A (not the R it is a track tire, not an autocross tire). Hoosier stick great but one false move and you are off the track. The 710s will give you a chance to recover. Also, if you are running in BC (like us in the Seattle area), you will have some cold damp tracks, not a good think for hoosier. The 710s are actually very good in the cool and wet. Hoosiers would be a great july and august tire.
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Old 09-12-06, 08:43 AM
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Originally Posted by Kill No Cone
I think the real question is have you driven on race tires before?
fyi...i'm not a noob. have been ax'ing for 8 years and am an instructor at my club (www.motorsportsne.com). always used v700's.
but that is very good info about the forgiveness of the two. i guess i am leaning towards the v710's for now but will look for the scca nationals to really decide. this is for next season anyway so i have time
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Old 09-12-06, 08:31 PM
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I have been running the 700 the last two years myself, and I loved them. I just went to 710s this year, and Wow what a difference. These tires stick and allow me to through the car around a bit.

I am not the precise driver I would like to be, so these are the right tires for me.
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Old 09-12-06, 09:34 PM
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I ran a set of V710s at the beginning of this year. I ran 205/50-15s on stock vert wheels. I didn't have my camber plates, so the car understeered a bit. I have to say the car was PLANTED!! It was stable in the rain until I got into a LOT of standing water going down our back straight and then it was very forgiven. Unfortunately, my wife and I only got 5 days out of them before they were corded.
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Old 09-12-06, 11:24 PM
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Originally Posted by DamonB
What I've seen in SS is everyone testing the A6 and then switching to them. Most of these guys had run the V710 the past few years but the Hoosier A6 is slightly faster IMO. The trend in all the national events this season has seen the faster rwd classes move from the V710 to the A6. I think you'll see the A6 edge the V710 out at Nationals this year unless the new asphalt surface there doesn't allow the A6 to show it's slight advantage.

I read the Mini article too but the Mini is a "slow" fwd car Every SS, ASP, BSP etc car I've seen switch from the V710 to the A6 got slightly faster. On the other hand the V710 is still an excellent tire and very competitive, is cheaper than the Hoosier and has a longer useful life (though I still wouldn't store them over the winter).
From what I've been told from various people is that the A6 is faster on asphalt and the V710 is faster on concrete. Thus many are switching to A6 for nationals.
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Old 09-13-06, 03:17 AM
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No experience with the A6, but I know you'd be very happy with the v710s, as for storing them in winter, if you store them inside the house, the impact would be way less... My codriver and I have gotten over a season out of the 710s and have used them in the rain with no problem. Also hoosiers are easier to flatspot and cord, so they are definitly less forgiving.
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Old 09-13-06, 12:10 PM
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Originally Posted by Kill No Cone
I have been running the 700 the last two years myself, and I loved them. I just went to 710s this year, and Wow what a difference. These tires stick and allow me to through the car around a bit.
just a guess, what do you think a new v710 improvement over a new v700 would be on a say 50 second course on asphalt? 1 second? that would be what i would hope for. then i wonder how much more improvement a v710 would be over a used up v700
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Old 09-13-06, 09:15 PM
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Yes, I would say that there was a full second improvement, maybe a touch more. Last year I was running 3rd and 4th, now I am running 1st and 2nd with the same guys.
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Old 09-14-06, 09:09 AM
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Originally Posted by 2MCHPWR
just a guess, what do you think a new v710 improvement over a new v700 would be on a say 50 second course on asphalt? 1 second?
I'd say it's most likely more. The V700 is a good tire, but it doesn't have the ultimate stick the V710 does.
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Old 09-16-06, 09:06 PM
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Ok, I went back a looked at the numbers between a guy I race with and myself.
We race about the same number of events and neither of us have made any major changes to our cars in the last two years.

He has been runnning VictorRacers for the last couple of years. Last year he beat me at every race except one. On average he beat me by 1.146 second a race (I was running 700s)

This year I have been running 710s and he is still running the VictorRacers (second year on these tires). I have beat him every race except for one. On average I have beat him by 1.088 seconds a race this year.

The way I figure it is that my new 710s are running 2.234 seconds faster than my 700s.
Take it for what its worth.
JEB
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