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Old 08-22-2003, 04:02 AM   #1
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Default What Tire & Insert Combination For Hot Asphalt

Our track frequently temps at 140 F and even hot track tires "grease-up".

Currently the tires of choice at our track are the Sorex 40R and the Yok 138GH with some using Sorex 36R in the earlier part of the day.

I usually use the Sorex firm/thin inserts in Sorex 40R's with excellent results but others swear by the Sorex med/thick, Yok 37M and the HPI inserts.

So, what is better? Thin/firm with a big air gap or thick/med.-soft with less air gap or no air gap at all?

What have you found (in your testing)?

BTW, Yok tires seem to have less air gap than Sorex with the same insert.

Thanks in advance!
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Old 08-22-2003, 04:08 AM   #2
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in testing i find that if u want more grip use a insert that gives more air gap and if ur car has too much grip decrease the air gap.
if u want more grip and choose a insert with more air gap mind u dont over cook them.if u do then u need an insert with less air gap.
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Old 08-24-2003, 12:40 AM   #3
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Our track is usually 140-160 this time of year. Sorex 36 and 40 both work well with hpi green inserts.
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Old 08-25-2003, 10:10 AM   #4
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I ran into a bad batch of Sorex's lately. Over the course of six weeks, every set of Sorex 36R's have been bad. I've gone to a different make.
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Old 08-25-2003, 11:59 AM   #5
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Default What Tire & Insert Combination For Hot Asphalt

In general, if the traction is there, less Air Gap will provide better handling.

I just about 100% of the time use Sorex 36R's on my Nitro Cars with HPI Red inserts. If the traction is low and surface really hot, I have to careful not to overdrive the Car or the Tires will "Grease-up". In this situation a firmer insert would be best.

One thing that I've found is the Sorex 36R's seem to have better overall traction and work in a wider temperature range than the other Sorex compounds. (this was from back to back testing done at several different tracks throughout that particular day)
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Old 08-25-2003, 12:07 PM   #6
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Default FREAKAH;

Quote:
BTW, Yok tires seem to have less air gap than Sorex with the same insert
I agree. What I like about using Yok inserts in the Sorex's is the EXTRA Air gap they provide if the traction is less than adequate.

For the most part, I will use HPI 24mm inserts for the wider selection of compounds.
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Old 08-25-2003, 12:21 PM   #7
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Hey popracer
Question :between sorex 36s and take off 32s which of these tires brands provide the best traction for hot weather?
Do you believing in (grease up)?
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Old 08-25-2003, 01:10 PM   #8
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OK, belive it or not, Yesterday track temps were reaching 155+F! and I was hooked up with CS27's (when my car wasn't getting glitched from people turning on radios in the pits ) I know it doesn't sound right but it wasn't just me. These were premounts I have left over from the Reedy Race!
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Old 08-25-2003, 01:12 PM   #9
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At the Hitec race track temps got around 140 for the mains, I was running Sorex 36R's with Xenon blue inserts, car was really hooked up on that combination...
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Old 08-25-2003, 01:16 PM   #10
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I ran 36's at Hitec too with HPI Reds. They hooked up almost too well.
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Old 08-25-2003, 01:21 PM   #11
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We run the 27's as a spec tire in our state series in Florida, and I cannto remember a time when they did not hook up on hot pavement. You have to be carefull not to overdrive them, but they work great in the heat. Personally, I think the 27 is the best "All around" tire on the market today.
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Old 08-25-2003, 01:31 PM   #12
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I would agree. Sometimes they're not the best tire but they are usable pretty much any time.
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Old 08-25-2003, 06:21 PM   #13
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Default What Tire & Insert Combination For Hot Asphalt

OVA;

I think that either brand is about equal. The inserts in the Take-off premounts are pretty soft so building you own with firmer inserts may be better for the hot weather.

For Nitro, on asphalt, I always use Sorex's (36R's). On Concrete Take-Offs just can't be beat.

With my Electric (Stock Motored) Car, I use either T.O. 27R's or Sorex 32,36R's depending on the conditions and Temperature.
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Old 08-25-2003, 07:32 PM   #14
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Default Sorex's and or take off's

Ova,

At our track we have seemed to go with 27's in the earlier part of the day and then go to 36r's with red, green hpi's inserts or yoke firm inserts. I think there might be a couple of guys using the sorex inserts but can not tell you for sure which ones.

The take off 32's are a great tire but the heat needs to be above 130 i think and we just all run sorexs by that time. I will try the 32's this next time we race and I'll let you know how they work out.
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Old 08-25-2003, 08:03 PM   #15
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Neil......have you called Billy about your sorex problem? What is the problem anyways?

We have been running 36's for almost 2 years......and have found them to be the most consistent tire.....batch to batch to batch.

Pick your insert for the temp of the track and boom.......you are dialed in!
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