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Old 04-29-2003, 08:14 PM   #1
Gonz
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Default Expected lifespan of KumhoVictoracers ?

While swapping my street tires back on after my last autocross, I noticed that one of my Kumho Victoracers was showing cord.

This is along a small portion of the circumerence at the very outer edge of the tread on my right front.

I'm wondering what kind of "mileage" you guys are getting out of various R-compound tires.

I have about 53-58 autocross runs on this set, but I think this wear is really premature due to insufficient camber up front.

The tread in the center and inside is fine on all tires. I run 38 PSI up front and 30 in the rear. Tires are 225-50-16

How long are your Kumhos or others lasting ? When they do go where are you guys seeing the cord first ?

Gonz.
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Old 04-29-2003, 11:44 PM   #2
SRT-4 is Fastar.
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Default Re: Expected lifespan of KumhoVictoracers ?

Quote:
Originally posted by Gonz
While swapping my street tires back on after my last autocross, I noticed that one of my Kumho Victoracers was showing cord.

This is along a small portion of the circumerence at the very outer edge of the tread on my right front.

I'm wondering what kind of "mileage" you guys are getting out of various R-compound tires.

I have about 53-58 autocross runs on this set, but I think this wear is really premature due to insufficient camber up front.

The tread in the center and inside is fine on all tires. I run 38 PSI up front and 30 in the rear. Tires are 225-50-16

How long are your Kumhos or others lasting ? When they do go where are you guys seeing the cord first ?

Gonz.
From what I've been told, it is VERY important that you shave
the Victoracers if you plan on tracking them, otherwide they will
cord.

...wait, 53-58 runs? nevermind, you are getting good life out of them.

From Kumho and Tirerack:

Notice:

The ECSTA V700 must be shaved to 3/32" - 4/32" tread depth for any autocross or track use in the dry.

Kumho advises that the ECSTA V700 DOT-legal competition radial must be shaved prior to use in dry conditions. If this tire is not shaved, excessive wear may occur causing the tire to wear to the cords prematurely in a localized area.

Tire heat cycling will not prevent the excessive localized wear of full tread depth tires but will continue to enhance the tire consistency and wear on shaved tires.

The ECSTA V700 should only be used at full tread depth (6/32") for wet track and wet autocross use.
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Old 04-30-2003, 12:17 AM   #3
Red Rocket
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Default

Actually the victoracer is can be shaved or not for autocross. I doesn't advise it on tirerack, but I have seen them shaved elsewear.

Are you running in DS? That would explain the lack of camber and wear.

Kevin
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Old 04-30-2003, 12:15 PM   #4
sdecker
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Default

Gonz:

I don't autox (yet) but I do use Victoracers on the track. I purchased a used set last fall from a Contour SVT auto-xer. They had maybe 60 percent 'tread' left at that point. I have since done three track days on them in the dry.

I normally run a mild street alignment, basically good for tire wear on my 18" Michelins. On the track, this translates to a lot of outer edge wear on the Victoracers...I've installed camber plates up front so I can dial up some negative at the track from now on.

If I had to guess, I would say I have about 400 hard track miles and maybe 200 street miles on the tires, and I think I can probably get at least 3 more track days on them before they are completely done.

FWIW, I am very aggressive about rotating and flipping the tires on the rims. Were you aware that they could be flipped? That may help you some...or some camber plates.

Scott
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Old 04-30-2003, 03:30 PM   #5
ChrisW
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I have had both the victoracers and Ecstas last a full 16 round season using the same size.

If you run track days, your wear will increase significantly from the ultra soft compound. On hot days, the tires can overheat quickly and blister. I have seen kumos victoracers used up in a single track event by an experiance driver.

If you dial in camber at autox events you will change you toe. I run -2.5 degrees on the street with no problems.

Flip them as nessesary. The Ecstas require flipping to reduce the groove of death.
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Old 04-30-2003, 09:30 PM   #6
Gonz
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Default

to clarify I have the Victoracer , not ECSTA V700. This is my third set of R-compound tires (on different cars)

Quote:
FWIW, I am very aggressive about rotating and flipping the tires on the rims. Were you aware that they could be flipped
You can FLIP the Victoracers ?? I know I can run them on either side of the car (despite sidewall logo) but I can actually put them on the rims inside out ? Please confirm this is do-able.

I guess I need to improve my suspension. Camber plates look promising ( had them on my last car ) but maikng a camber change via the strut top mount will mess up my toe setting?

I ran DStock all last year. This year I'm running SM, so far I only have engine/exhaust work, but I am open to suspension changes.

You guys think 38 PSI up front enough on a stock suspension? There's a guy in an SVX at our local events that runs 50 up front on same tires.

I have chalked the sidewall to check the rollover, and I thought it was OK. Would more PSI save the outer edge at the expense of grip ?

Thanks,

Gonz.
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Old 04-30-2003, 10:07 PM   #7
sdecker
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Yes, you can definitely flip them 'inside out' on the rims to maximize tread life. I looked for the link on Kumho's site where I got the info originally but can't find it. Trust me on this one, though. I've been running mine that way since day 1 (they were used when I got them, remember). Kumho officially approves their use, although they mention that the wet traction (ha ha) may not be quite as good when flipped.

More PSI will decrease the edge wear, but may increase the center wear. It really depends on how you are driving. You also want to be careful not to go too high; I normally run 38-41 psi on the fronts, but I still get edge wear from understeer and crappy driving (grin) so I put the plates on.

You will get a lot more life out of your Victoracers if you flip 'em.

Good luck!

Scott

Quote:
Originally posted by Gonz
to clarify I have the Victoracer , not ECSTA V700. This is my third set of R-compound tires (on different cars)



You can FLIP the Victoracers ?? I know I can run them on either side of the car (despite sidewall logo) but I can actually put them on the rims inside out ? Please confirm this is do-able.

I guess I need to improve my suspension. Camber plates look promising ( had them on my last car ) but maikng a camber change via the strut top mount will mess up my toe setting?

I ran DStock all last year. This year I'm running SM, so far I only have engine/exhaust work, but I am open to suspension changes.

You guys think 38 PSI up front enough on a stock suspension? There's a guy in an SVX at our local events that runs 50 up front on same tires.

I have chalked the sidewall to check the rollover, and I thought it was OK. Would more PSI save the outer edge at the expense of grip ?

Thanks,

Gonz.
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Old 04-30-2003, 10:10 PM   #8
sdecker
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Default

Quote:
Originally posted by sdecker
Yes, you can definitely flip them 'inside out' on the rims to maximize tread life. I looked for the link on Kumho's site where I got the info originally but can't find it. Trust me on this one, though. I've been running mine that way since day 1 (they were used when I got them, remember). Kumho officially approves their use, although they mention that the wet traction (ha ha) may not be quite as good when flipped.

Not exactly from the horse's mouth, but close enough (Tirerack's site):

The V700 tires features an asymmetric tread designs and "SIDE FACING OUTWARDS" and "SIDE FACING INWARDS" messages are branded on their sidewalls. New tires should always be installed accordingly.

However, while V700 tires continue to be branded with right ("R") or left ("L") side of vehicle markings and rotation arrows which originated with Kuhmo's desire to reduce stress on the tire's tread splices, Kuhmo has since developed tread splices that make following the side of vehicle markings and directional arrows unnecessary. Today, there is only one part number for each size tire and experience has shown that V700 tires can be installed on either side of the car, run at any wheel position, and are not required to be run directionally.
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