V710 or A6 for camber challenged Corvette
04-10-2009, 11:51 AM
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V710 or A6 for camber challenged Corvette
My 1993 Z07 C4 is used primarily for autocross (AS).
I can only get about 1.3° negative camber on the front.
Last year I used A6's and indeed corded the shoulder (though had I flipped the tire midseason that wouldn't have happened).
Reading the Hoosier website, they indicate A6's like lots of negative camber, and I had read somewhere that Kumho's work well with low negative camber cars.
I saw the results of the recent El Toro event, and Scott McHugh and Tom McDaniel are both running Kumhos in their '89 C4s.
Can I draw a conclusion from this that the Kumho's would be a better choice for the C4?
Has anyone used both tires on a C4 and have an opinion?
Brian
I can only get about 1.3° negative camber on the front.
Last year I used A6's and indeed corded the shoulder (though had I flipped the tire midseason that wouldn't have happened).
Reading the Hoosier website, they indicate A6's like lots of negative camber, and I had read somewhere that Kumho's work well with low negative camber cars.
I saw the results of the recent El Toro event, and Scott McHugh and Tom McDaniel are both running Kumhos in their '89 C4s.
Can I draw a conclusion from this that the Kumho's would be a better choice for the C4?
Has anyone used both tires on a C4 and have an opinion?
Brian
04-10-2009, 10:32 PM
#5
Burning Brakes
04-11-2009, 12:23 AM
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Actually, I race in Washington state and McHugh races in California, I believe.
I assume he races on 275's since Kumho's 295's are 40 series and taller than the 275's, unlike Hoosiers 295's which are slightly shorter than their 275's.
It seems that common wisdom says that Hoosiers are faster, but Kumho's wear better for autocross.
This is my second year autocrossing, so I've got a lot to learn.
But yes, I am aware that stock classes won't allow modifications to the suspension.
Brian
I assume he races on 275's since Kumho's 295's are 40 series and taller than the 275's, unlike Hoosiers 295's which are slightly shorter than their 275's.
It seems that common wisdom says that Hoosiers are faster, but Kumho's wear better for autocross.
This is my second year autocrossing, so I've got a lot to learn.
But yes, I am aware that stock classes won't allow modifications to the suspension.
Brian
04-11-2009, 02:01 PM
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Slow down in the curves. Dont overdrive the tires. 60 good runs on a set of hoosiers is easily done, just need to be flipped. Although 80-90 runs on Kuhmos are the norm.
If its your second season you may want to go Kuhmo. Cheaper to learn on. I run Hoosiers at region point events and Kuhmo every where else.
If its your second season you may want to go Kuhmo. Cheaper to learn on. I run Hoosiers at region point events and Kuhmo every where else.
03-26-2010, 01:10 AM
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I too am camber challenged with only -.25 degrees in the front and have been wondering about Kumhos vs. Hoosiers. Disregarding tire life would the Hoosiers be faster?
03-26-2010, 08:09 AM
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Melting Slicks
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Isn't McHugh a Kumho paid driver? If so, he has to drive Kumhos and gets free tires, so he can always be on a new set when it matters.
If I were starting out in a camber challenged car I'd start with the Kumho's but use the Hoosiers if I wanted to win a national championship.
You got to flip Hoosiers if you want them to last.
Good luck.
03-26-2010, 10:40 AM
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You will cord the outside edge of the Hoosiers if you don't flip them mid-season.
I speak from experience.
I got a full season out of the Hoosiers, but expect to be a few tenths slower by the end of the season.
Locally, everyone else will probably be in the same boat.
I speak from experience.
I got a full season out of the Hoosiers, but expect to be a few tenths slower by the end of the season.
Locally, everyone else will probably be in the same boat.
03-26-2010, 01:50 PM
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The Kumho also has a softer side wall that will also slow your steering. If I had a C-4 I'd run Kumho's. My car has 9 1/2 inch rims and even with 2.5 degress neg, camber my outside edges wear, but not enough that I need to flip them. The taller Kumho's won't fit under my front fenders.
03-26-2010, 03:36 PM
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Anyone have any experience with Hoosier A6s in the 295/35/17 vs. 275/40/17 size on 9.5" wheels on a C4? The 295s are .3" shorter. I wonder if the larger size wrapped on a smallish wheel will cause less of an issue with cording the outer edges and possibly make the tire work better? I would like to hear any thoughts or similar experiences with larger tire sizes.
03-26-2010, 05:55 PM
#15
Melting Slicks
Anyone have any experience with Hoosier A6s in the 295/35/17 vs. 275/40/17 size on 9.5" wheels on a C4? The 295s are .3" shorter. I wonder if the larger size wrapped on a smallish wheel will cause less of an issue with cording the outer edges and possibly make the tire work better? I would like to hear any thoughts or similar experiences with larger tire sizes.
