Originally Posted by
RedBullFiXX
If your diff is locked (and it should be) it will go straight on power, unless there is something off in the front end
Try using proper silicon diff grease
A bad rear bearing or a left side hub set too tight against the bearing will also cause the car to pull to one side
3Racing spur gear uses 1/8th diff balls stock.
On the gear ratio Jpap is right...the higher the ratio is numerically the more wheel spin you will get. The closer to 1:1 you get the less wheel spin you get.
Originally Posted by
blade072
as for years racing.....let me reword that, what other cars or classes have you run??
almost 20 years racing...over 10 years as a race director...3 years as a contributing author. Other classes (brushed): Stock 27t 1/10th pan car (road course), stock 27t 1/12th pan car, stock touring car, mod 1/10th pan car, mod touring car, Tamiya black can F1, 1/10th stock 2wdbuggy, 1/10th stock stadium truck, mod 1/10th monster truck, mod 1/10th 4wd buggy, oval mod 1/10th pan car. Other classes (nitro): 1/10th 2wd .15 nitro, 1/8th 4wd .21 nitro (on-road), 1/8th 4wd buggy .21 nitro. Other classes (brushless): 17.5 boost 1/12th scale, 13.5 boost 1/12th scale, 10.5 1/12th scale, 17.5 blinky 1/12th scale, 13.5 blinky 1/12th scale, 17.5 boost touring car, 21.5 blinky F1...I think that is it...I might be missing one or 2...it's been a long run and I don't remember them all
Originally Posted by
blade072
the bigger the spur/pinion the less rip you get out of the corners and would be easier to drive (smoother)....
This is theoretically true to an extent but not in terms of gear ratio...if you use say a 100 spur and 50 pinion vs say a 50 spur and 25 pinion...the gear ratios themselves are the same but the 100/50 has more rotating mass than the 50/25 so you will lose some punch. However in practical terms the gear ratios being the same the difference in mass has such a small difference in acceleration that the average driver isn't going to be able to tell the difference. Now if you compare the 100/25 to say a 50/25...you now have a 4:1 gear ratio vs a 2:1 gear ratio. Even though the 100/25 are bigger gears they are going to have more acceleration and therefore more wheel spin than the 50/25.
Originally Posted by
blade072
in most cases with gear ratios and motor winds.....the lower the number the faster it is usually
This is true...however more top end does not mean more wheel spin...more acceleration = more wheel spin. Top speed and acceleration have an inverse relationship. Meaning the more top speed you have the less acceleration you will get...the more acceleration you have the less top speed you will have.