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> American Racer Tires, Just ordered a set
Randal
post Apr 7 2014, 09:00 AM
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QUOTE(Woody @ Apr 7 2014, 07:49 AM) *

I ran them yesterday in the rain. There was very little standing water so I went with the slicks instead of my 888s. First impressions were pretty good although my driving sucked. Turn in is less crisp than with the A6s but it was an easy adjustment. They feel different under braking and I was having a hard time finding the threshold, granted the tire is a bit taller and it was wet out. I didn't find the limit through the slaloms but they would understeer just a bit mid corner before the back end would start to slide. Tire temps never got above 72 degrees with the rain. I started at 20 psi front cold and 19 psi rear cold and gained maybe 1 psi all around. I have another event this coming weekend so hopefully I can provide a better review.

https://www.youtube.com/watch?v=LX2Urw2U5iQ










72 degrees? That is freezing for a slick; reminds me of the Medford Spring Enduro last year.

You'll have some real fun when you find the temperature where the mechanical grip turns to sticky.
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Matt Romanowski
post Apr 7 2014, 12:13 PM
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How did you fit 275s on 8s? Those usually need at least a 9 and can go on a 10" wheel.
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Woody
post Apr 7 2014, 01:06 PM
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QUOTE(Matt Romanowski @ Apr 7 2014, 01:13 PM) *

How did you fit 275s on 8s? Those usually need at least a 9 and can go on a 10" wheel.

I was running 225s up front on 8s and 275s on 10s out back. Now I'm running the slicks square on those same 8s and 10s. I was not square with the A6s.
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Matt Romanowski
post Apr 7 2014, 01:43 PM
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I'm surprised you could fit a 275 on an 8" rim. That is not an optimal rim width for that tire.
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Woody
post Apr 7 2014, 01:48 PM
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I wasn't. I was running a 225 on the 8s.
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Woody
post Apr 7 2014, 01:53 PM
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I wouldn't try mounting a 275 A6 on an 8" wheel. With the 10" bias tire it doesn't seem to mind one bit.
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Matt Romanowski
post Apr 8 2014, 07:54 AM
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You should talk to the tire engineer and see what he says. You can shoe horn wide tires on narrow rims, but it rounds out the contact patch and you will actually lose grip. Bias plys will mount on narrower rims because of the flexibility in the carcass, but it's not always good.
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koozy
post Apr 8 2014, 08:17 AM
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I'm looking forward to hearing what the results will be with warm/dry weather testing.
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brant
post Apr 8 2014, 08:23 AM
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72 degree's ambiant or tire temp?

we have had a lot of TTOD in temps like that... the tires can still work if you have the right tire temp built up.
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Han Solo
post Apr 8 2014, 08:25 AM
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QUOTE(Woody @ Mar 29 2014, 01:19 PM) *




A little off topic but...

Woody, what type of fastener are you using on your fiberglass fender flares? I'm doing an autocross build and that would simply things greatly. Thanks!
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koozy
post Apr 8 2014, 08:29 AM
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QUOTE(brant @ Apr 8 2014, 07:23 AM) *

72 degree's ambiant or tire temp?

we have had a lot of TTOD in temps like that... the tires can still work if you have the right tire temp built up.


72 and wet? Daunting
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Woody
post Apr 8 2014, 04:42 PM
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QUOTE(Matt Romanowski @ Apr 8 2014, 08:54 AM) *

You should talk to the tire engineer and see what he says. You can shoe horn wide tires on narrow rims, but it rounds out the contact patch and you will actually lose grip. Bias plys will mount on narrower rims because of the flexibility in the carcass, but it's not always good.


I would think this would be visible taking tire temps, no? The car is set up for staggered tires. My intent was to lose a little bit of tire width up front by squeezing the tires on the rims so I could kinda sorta maintain that stagger as I like the way the car feels. Yes, its probably not the right answer but I cannot swing for a set of Avons right now.

QUOTE(brant @ Apr 8 2014, 09:23 AM) *

72 degree's ambiant or tire temp?

we have had a lot of TTOD in temps like that... the tires can still work if you have the right tire temp built up.


Tire temps immediatly after a run. Ambient may have been a little colder.

QUOTE(Han Solo @ Apr 8 2014, 09:25 AM) *

QUOTE(Woody @ Mar 29 2014, 01:19 PM) *




A little off topic but...

Woody, what type of fastener are you using on your fiberglass fender flares? I'm doing an autocross build and that would simply things greatly. Thanks!


I am just using big headed 3/16 aluminum rivets with a fender washer on the backside.

QUOTE(koozy @ Apr 8 2014, 09:29 AM) *

QUOTE(brant @ Apr 8 2014, 07:23 AM) *

72 degree's ambiant or tire temp?

we have had a lot of TTOD in temps like that... the tires can still work if you have the right tire temp built up.


72 and wet? Daunting

I have a few FTDs in the wet. These tires in my opinion felt better than the A6s in similar conditions.
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koozy
post Apr 8 2014, 04:45 PM
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My car wilts in the rain
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Woody
post Apr 14 2014, 07:25 AM
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Well we had great weather yesterday and I got 5 good runs in. On a 35 second course the car is at least a half second faster than it ever was on the A6s, maybe a full second. The need for a TB diff is exagerated with this setup so I ended up going full stiff on the front bar. It helped but just masked the problem. Turn in was great, Haven't found the limit while in the slaloms and it seems very predictable mid corner. It was about 85 degrees ambient and I saw 110 on the tires which was close to what the other guys were seeing.

My two best runs.

https://www.youtube.com/watch?v=exodqAGWBXQ

https://www.youtube.com/watch?v=J1o1TbTK-dU
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koozy
post Apr 14 2014, 08:40 AM
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Very interesting. What pressures were you running?
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stownsen914
post Apr 14 2014, 09:36 AM
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QUOTE(koozy @ Apr 8 2014, 06:45 PM) *

My car wilts in the rain



Ha. Mine melts (IMG:style_emoticons/default/smile.gif) Open top car on slicks and rain - bad mix ...
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Woody
post Apr 14 2014, 11:16 AM
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QUOTE(koozy @ Apr 14 2014, 09:40 AM) *

Very interesting. What pressures were you running?

Ended up at 21 hot all around. Still have a bit of tuning to do. Temps were even across the tires, within 5 degrees.
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koozy
post Apr 14 2014, 11:31 AM
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Ah, low pressures. They must have a robust sidewall. Very nice results. Can't wait to see how they hold up. What alignment specs are you running?
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Woody
post Apr 14 2014, 12:18 PM
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QUOTE(koozy @ Apr 14 2014, 12:31 PM) *

Ah, low pressures. They must have a robust sidewall. Very nice results. Can't wait to see how they hold up. What alignment specs are you running?


-1 degree front, -.75 degrees in the back. Slight toe in rear, toe out front.
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Woody
post Apr 14 2014, 12:19 PM
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