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Old 11-11-2008, 02:09 AM   #1
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Default 1/12th tire additive question

Hi,

I've been out of 1/12th for some time (about 15 jears....). In the old days, when you only partly applied additive to the fronts, you'd coat the inside part of the tire and leave the oter untreated.

Does this still apply or are there reasons to apply the outside edge and leave the inside untreated?

I've been running Jaco black in the front and have too much steering in the first few laps. Would changing the way I apply additive help or is this a trait of the tire and would changing to purple help more?

I run grey in the rear. And use full wash in the rear and half in front about 30 minutes prior to the run.

Thanks for any insights.
Julius
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Old 11-11-2008, 03:14 AM   #2
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It's still the same, vary front additive based on grip..usually the inside half is enough
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Old 11-11-2008, 06:10 AM   #3
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Julius, nice that you started driving again.

I think you use these compounds on the new Mach track in Haarlem?
Apply additive 30 min's before 100% on the rear tires, and 15 min's before 50% on the front. Then 7 or 8 min before the start make the tires dry by massaging them.

Not more than 50%, en make sure it's not leaking over the tire when drying!.

50% is already a lot, bu i've got a really slow and easy build up front end.. that's my choice ;-)

If you change to purple you will loose al steering because of the pick up on the brand new track. Try driving 5 degrees reactive caster, or a harder front spring (0.22)

Good Luck, next CW you need to be there too!!

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Old 11-11-2008, 07:17 AM   #4
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I use to have the same issue with the blacks up front.They went from too much bite to not enough.I switched over to running lilacs upfront with 100% coverage and been on the gravy train with biscuit wheels every since
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Old 11-11-2008, 11:08 AM   #5
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We run blacks up front to combat the fuzz of the carpet sticking to the tires. That is also why running yellow in the rear creates problems after 4-5 minutes.
How are the lilacs concerning that issue?

Or are there other options here?
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Old 11-12-2008, 03:12 AM   #6
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Julius,

Any tire that is "old" (and additive-ed al lot) will pick up a lot of hair. Brand new tire's are better. Also really soft tires will pick up hair like Lilac, Double Pink, Magenta en Purple.
The compound of black (and grey in the rear) will make the car pick up less hear. Also using the right additive will help a lot! Use stuff that's is not so sticky or high bite in the beginning. Use stuff like Corally Jack the Gripper, or Markus Mobers (mobzappers or something) additive.

Last CW the pick up wasn't that bad as in the beginnig, so maybe a softer tire with an other compound then Black will alreay do, but i'm not sure.

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