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Old 03-24-2005, 10:50 PM   #61
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Ok thanks I'll look to convert to 24mm.
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Old 03-24-2005, 11:04 PM   #62
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Gary-Yeah-I'll try and get there early on April 2nd for practice. After all the preparation for tonights practice I couldnt practice. Oh well.

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Old 03-24-2005, 11:28 PM   #63
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I guess the track will be open from 10-9 for practice, and I am hoping to be there between 1-2PM. Should be fun, I'm really looking forward to it.
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Old 03-25-2005, 10:17 AM   #64
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I just found this thread and wanted to chime in on what was being said earlier about rotational mass. In some instances it can be better to have a little heavier rotational mass. When I ran Losi's, one of the tricks we used to get a little more corner speed was to switch to the steel outdrives from the plastic. The idea was that the car wouldn't slow down as fast and carry more momentum through the corner. So I'd imagine the same can be true for the wheels as well within reason.

I do have a question as well. How many people bother balancing their tires? I've done it many times but I've found I end up having to tons of weight to the wheels, especially premounts, to get them balanced. Not quite so much on unmounted. And I honestly didn't really notice any difference on the track. Any thoughts?
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Old 03-25-2005, 10:34 AM   #65
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who made those steel outdrives?
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Old 03-25-2005, 10:39 AM   #66
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Losi
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Old 03-25-2005, 11:17 AM   #67
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Default Balancing

Hey Jon,

I haven't been doing this long enough to notice the difference between balanced and unbalanced wheels/tires. BUT.... I can't imagine it doesn't make a difference.

For offroad tires, especially truck, I have had to add tons of weight like you mentioned. The wheels/tires felt quite a bit heavier in my hand, which can't be that good. However, I do believe it makes the handling more consistant, and reduces spot wear on the tire.

For Onroad, I think it's a must if your serious (which I know you are). The amount of weight I've had to use is pretty minimal, probably less than 2 grams at the most. I do notice that there aren't the specific wear spots on the outer edge on my balanced wheels/tires as I have on my unbalanced sets.

I think of it this way. On a real car, you would notice even a slightly unbalanced tire on one corner driving at 40 mph. Some of the wheel/tire combos I have are VERY unbalanced, and I have to believe it affects the consistancy of the handling, and the wear an tear on the suspension, shocks, and even the tire itself. You wouldn't even consider getting in a real race car that didn't have balanced wheels/tires, and even a small flat spot makes a big difference in handling, so I balance mine.

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Old 03-25-2005, 11:19 AM   #68
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One last thing, it isn't the balancing that makes all the difference. It's the balancing, the trimming of the tire, free suspension, free drive train, smooth bearings..... etc.

The details add up to a big difference, I think.

Mike
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Old 03-25-2005, 11:50 AM   #69
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I have never seen any factory driver balance wheels except at the IFMAR worlds and at that race I only saw 2 or 3 guys doing it. I travel to almost every major race every year so I see a lot of top level racing. I don't recall every seeing a top drive balancing tires at a National, Reedy Race, etc.

FYI, I was in charge of Tech at the Worlds so I looked at every single wheel/tire that went on to the track.
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Old 03-25-2005, 12:01 PM   #70
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Hi Adrian,

I can appreciate your experience and knowledge, but that doesn't mean it isn't worth doing. (though I question this when I'm taking the time to do it )

I've been to a lot of major full size auto races, and competed myself, and I've never seen anyone NOT balance their tires. Does that mean that running unbalanced tires in R/C racing doesn't work? No, but could it improve the performance of an R/C car? I believe it can.

If everyone followed what factory driver or factory team X is doing or not doing, would anyone improve?

If no one ever looked for that hundreth of a second, F1 would still be running without any areodynamics, on treaded tires that lasted for 2 full race weekends.

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Old 03-25-2005, 12:01 PM   #71
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I did it during practice last year at Reedy to half of the tires I had for practice and didn't notice any difference. I think the difference between an unbalanced tire on a full size car and on a RC car is the fact that if the RC tire is off, it's so minimal compared to a full size car, that it really wouldn't effect too much. I just was wondering how many people out there do go through the trouble.
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Old 03-25-2005, 12:05 PM   #72
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Quote:
it's so minimal compared to a full size car
True, but R/C cars are minimal compared to full size cars, so wouldn't that difference be similar in scale? All you have to is gun it while your car is on the stand to see what unbalanced tires do.

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Old 03-25-2005, 12:20 PM   #73
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My concern is that there are a lot better uses for the time of the racers reading this thread than balancing tires, i.e. practice. When 90% of the guys reading this have one or two 6sec crashes everytime they race having balanced tires is not going to do them any good.

I see guys sweating minute details on this website everyday, spending $$ on packs and tuned stock motors. The best way to go faster is to race/practice more. You can give a good driver a blown out battery, a motor with a comm that looks like a chewed up apple core and a set of tires with the belt showing and that guy will beat a lessor driver running 1.19v cells, a 19T arm in a stock can and a bling'd out sedan. Of course I am exaggerating a little but I see this every weekend...lol!

For club racing winning a 60% driver, 25% car prep and 15% equipment.
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Old 03-25-2005, 12:34 PM   #74
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I will agree that statement 100%. I probably don't get enough out of my car to use that hundreth of a second to beat a national champ, but I still get that hundreth of a second! (which is lost the first time I hit a dot, haha)

I am surprised more top level drivers don't do it, since at the level, everything counts. Not sure if I'll ever be at that level, but I'll use every trick in the book if I am.

I'd even say at the CR level, 70% driver, 25% tire choice, and 5% making sure the setup isn't really really bad.

Mike
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Old 03-25-2005, 12:56 PM   #75
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Default Changing inserts

OK-so I have the right rim-the correct tire, but the wrong insert installed. I am grasping at straws-but is there any chemical that will un-CA the tire from rim, but save the tire and rim?

I once heard of using Acetone-whihc I have a lot of here at work.
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