Tamiya mini cooper
#7293
Tech Elite
iTrader: (7)
Join Date: Jun 2002
Location: Melbourne, Australia. Home of rc-mini.net
Posts: 3,549
Trader Rating: 7 (100%+)
I bought my 3racing ball diff on ebay for $9. its fully adjustible and i think it spools up quicker then the ta03 diff. And i own two ta03 cars and four ta03 ball diffs, i think there's a huge difference.
Also tony my problem was half stearing alignment but still has a unstable feel to it.
Also tony my problem was half stearing alignment but still has a unstable feel to it.
Dude, you're running X patterns, right? Try something else... Some X patterns do exactly what you're describing... Instability and spinning around in turns..
The quality of them is very inconsistent.
#7294
Tech Fanatic
iTrader: (1)
LATC3: Here are a couple of items that you may find helpful, all lovingly typed out using proper grammar. (sort of)
These are general rules that I found can make a car a bit easier to drive, on most surfaces.
Tires: The rule of thumb is to have a little more grip on the front tires than the rears. I usually run type A slicks up front, and s grip radials at the rear. Another rule (that I don't really follow) is to have the tire inserts harder up front than in the rear tires. I have found that I can run hard inserts at all 4 corners without any problems. The difference in grip between front and rear is more critical.
Toe: Most will suggest having a very slight toe out in the front, with a little toe in at the rear, about 1.5 degrees is usual. I run almost neutral toe at the front wheels, and 1.5 in at the rear. I've found that too much toe out at the front wheels can make the car twitchy. The grippier tires up front will compensate for the lack of toe on turn in. The added bonus is that you get a little less drag having your front wheels straight.
Dampers: There are loads of opinions on what works and what makes a difference. The general school of thought is harder springs up front, with softer springs at the rear. Shock oil isn't terribly critical, but it can make a subtle difference in the way the car handles, especially at turn in. Again, stiffer at the front, softer at the rear.
Limiting travel in the dampers is probably more important than what weight of oil you use, however. A couple of O-rings inside, under the piston, and one outside, on the shock shaft can help a lot. The O-rings inside limit droop, and the O-ring outside, if your car is setup in typical fashion, will be just enough to keep your car from bottoming out. Hitting bottom on your chassis is an absolute no-no. If you bottom out, you lose traction and control.
In any case, these are things that I've found that have helped me. They may not be right, and I can't guarantee any of it will work for you. I know guys running totally stock minis that kick my butt on a weekly basis. Some of those guys are even running the stock kit tires. (show-offy bastards!) I suppose then that these tips just make the car a little easier to drive if you're as lame as I am at RC driving.
Jim
These are general rules that I found can make a car a bit easier to drive, on most surfaces.
Tires: The rule of thumb is to have a little more grip on the front tires than the rears. I usually run type A slicks up front, and s grip radials at the rear. Another rule (that I don't really follow) is to have the tire inserts harder up front than in the rear tires. I have found that I can run hard inserts at all 4 corners without any problems. The difference in grip between front and rear is more critical.
Toe: Most will suggest having a very slight toe out in the front, with a little toe in at the rear, about 1.5 degrees is usual. I run almost neutral toe at the front wheels, and 1.5 in at the rear. I've found that too much toe out at the front wheels can make the car twitchy. The grippier tires up front will compensate for the lack of toe on turn in. The added bonus is that you get a little less drag having your front wheels straight.
Dampers: There are loads of opinions on what works and what makes a difference. The general school of thought is harder springs up front, with softer springs at the rear. Shock oil isn't terribly critical, but it can make a subtle difference in the way the car handles, especially at turn in. Again, stiffer at the front, softer at the rear.
Limiting travel in the dampers is probably more important than what weight of oil you use, however. A couple of O-rings inside, under the piston, and one outside, on the shock shaft can help a lot. The O-rings inside limit droop, and the O-ring outside, if your car is setup in typical fashion, will be just enough to keep your car from bottoming out. Hitting bottom on your chassis is an absolute no-no. If you bottom out, you lose traction and control.
In any case, these are things that I've found that have helped me. They may not be right, and I can't guarantee any of it will work for you. I know guys running totally stock minis that kick my butt on a weekly basis. Some of those guys are even running the stock kit tires. (show-offy bastards!) I suppose then that these tips just make the car a little easier to drive if you're as lame as I am at RC driving.
Jim
Very interesting thanks for the info.
i use a little toe in.
If you have a little toe in under torque the front will lift so it will level to zero toe in.
If you have zero toe in at a stop, under torque it will go into a little toe out under power. So that will add drag... correct me if I'm wronge
#7295
Tech Fanatic
iTrader: (1)
We've seen/tried about 3 or 4 - 3 Racing Ball diffs. Not one of them could we tighten enough to work without slipping hugely... Maybe 1 in 500 actually does work..
Dude, you're running X patterns, right? Try something else... Some X patterns do exactly what you're describing... Instability and spinning around in turns..
The quality of them is very inconsistent.
Dude, you're running X patterns, right? Try something else... Some X patterns do exactly what you're describing... Instability and spinning around in turns..
The quality of them is very inconsistent.
If its not to much trouble can you post a link where i could get some good tires for my mini... maybe ebay? Or an online store? Something in the states also! Lol
But yeah? You can't get the 3racing diff to work? I guess i got one of the good ones. It works very good.
Does a solid front diff work good?
#7296
I will most likely get flamed for this as i have before, but I fill the tamiya servo saver full of CA glue. I had trouble getting the car to track straight, even with an expensive servo. It helped a great deal with the problem, and the alloy servo mounts completely fixed it.
#7298
Setup Sheet
I don't know how many people reads the WHOLE thread so that they accidentally find my Setup Sheet, it's just I need to get it back to life
Hope u like it....................
Hope u like it....................
#7299
R/C Tech Elite Member
iTrader: (10)
...but they're illegal in most clubs...and they're not really worth it. Don't get me wrong, I love 3Racing product, just not this product.
Or, you could buy the Kimbrough, and still have your servo protected in a crash?
This is true. I've run old beaters tires outdoors on crap asphalt, and I'm thinking they'll be good to go for some racing again this Sunday. I'm telling you, flaming sandpaper is not a good racing surface.
Very glad to help. I had a lot of problems with the car getting weird, too.
Actually, under power, it will toe in. (wheels pulling forward against a fulcrum...yada yada yada...) Unless, of course, there is some suspension action I'm not taking into account.
Or, you could buy the Kimbrough, and still have your servo protected in a crash?
This is true. I've run old beaters tires outdoors on crap asphalt, and I'm thinking they'll be good to go for some racing again this Sunday. I'm telling you, flaming sandpaper is not a good racing surface.
Actually, under power, it will toe in. (wheels pulling forward against a fulcrum...yada yada yada...) Unless, of course, there is some suspension action I'm not taking into account.
#7300
#7302
Tech Fanatic
iTrader: (1)
I will most likely get flamed for this as i have before, but I fill the tamiya servo saver full of CA glue. I had trouble getting the car to track straight, even with an expensive servo. It helped a great deal with the problem, and the alloy servo mounts completely fixed it.
#7303
Tech Fanatic
iTrader: (1)
People using the o-ring methed with no droop should set it to zero. There will be no lifting so it wouldn't toe out...
I like droop in the front with a little toe in... maybe limiting droop will solve my spin out problem?...
I never thought about it!