1LikesGear Diffs in 2WD 1/10th Offroad cars
02-05-2012, 07:56 PM
#16
I tried gear diff one time in my b4 and did not like it at all..did not seem to rotate as well as a ball diff....if you can build a good ball diff you will notice a BIG difference..yes there is more maintenance but if you are a serious racer..chances are..you will maintain your stuff no matter what
02-05-2012, 07:57 PM
#17
Brandon, all you have to do provide scientific proof as to why a ball diff will always be faster than a gear diff. Giving generalized statements simply doesn't work.
I once weighed the SC10 ball diff and gear diff, and the gear diff was 1g lighter than the ball diff, even full of fluid. So, it would seem that you could even shave 1g of weight from the rotational mass from the SC10, but time and time again, the pro drivers were using the ball diff. One of our best drivers at the local track here says he shaved a half second off per lap switching from the gear diff to the ball diff.
Personally, I have found ball diffs easier to setup and maintain than a gear diff, and with some pro setups running very light gear diff oil, it would seem there is very little difference between a freely spinning and smooth ball diff vs a freely spinning and smooth gear diff, except that one usually leaks.
Also, it is pretty much a tuning fact that increasing rear diff oil weight in a 2WD causes push into corner entry and that alone is just completely unacceptable to pro drivers. A properly running ball diff doesn't do that because it spins so free.
Personally, I have found ball diffs easier to setup and maintain than a gear diff, and with some pro setups running very light gear diff oil, it would seem there is very little difference between a freely spinning and smooth ball diff vs a freely spinning and smooth gear diff, except that one usually leaks.
Also, it is pretty much a tuning fact that increasing rear diff oil weight in a 2WD causes push into corner entry and that alone is just completely unacceptable to pro drivers. A properly running ball diff doesn't do that because it spins so free.
Too heavy oil, and yes you will push on corner entry because the inner rear tire can't react fast enough. Too light an oil and you diff out. This is were a ball diff has an advantage.
I will still hold my opinion in saying that a properly setup gear diff can be just as fast as a ball diff.
02-05-2012, 08:01 PM
#18
nevermind me, just tagging to see where this goes.
02-05-2012, 08:02 PM
#19
Subscribed!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
02-05-2012, 08:04 PM
#20
Subscribed!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
Just like you, I'm after real proven facts as to why people say a ball diff will always be faster than a gear diff in a 2wd 1/10 buggy application.
Last edited by Autocratic; 02-05-2012 at 08:20 PM.
02-05-2012, 08:04 PM
#21
Subscribed!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
If we can get past the name calling and chest puffing...
I would like to hear the pros and cons of each! From what I have heard there is an issue of leaking in the gear diffs...
Personally I wouldn't mind doing a lil testing on my own!
The Losi Ten-SCTE has 3 gear diffs and they are great! The rest of my fleet has ball diffs and those are great as well!
02-05-2012, 08:27 PM
#23
I think gear diffs might be an option part to look at! A local sponsored guy ran one a bit last year and looked really good with it! But I think he went back to the ball diff though for some reason.
02-05-2012, 08:35 PM
#27
Balls diffs react to motor load-torque, as they are a combination of rolling and sliding (friction) contact. Under low motor load they are relatively free, helping with turn in and carrying speed through the corner. Under acceleration the balls get bound up some in the gear, helping avoid the dreaded diffing out and spinning one wheel.
Gear diffs are largely based on rolling contact, they don’t vary much with motor load. They need to be loaded with fluid to prevent diffing out, but that same loading tends to reduce turn in, and puts additional load on the tires mid corner.
Gear diffs are largely based on rolling contact, they don’t vary much with motor load. They need to be loaded with fluid to prevent diffing out, but that same loading tends to reduce turn in, and puts additional load on the tires mid corner.
02-05-2012, 08:37 PM
#28
Try to be reasonable and mature about this discussion please.
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
Are you an engineer or someone with a mechanical/technical background or degree? Only asking because I like to know if people are getting information from sources or internal. Something rarely done on forums like this.
Since we are talking about gear diffs, is it possible to have a gear diff react and drive like a ball diff would given it's mechanical function?
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
Balls diffs react to motor load-torque, as they are a combination of rolling and sliding (friction) contact. Under low motor load they are relatively free, helping with turn in and carrying speed through the corner. Under acceleration the balls get bound up some in the gear, helping avoid the dreaded diffing out and spinning one wheel.
Gear diffs are largely based on rolling contact, they don’t vary much with motor load. They need to be loaded with fluid to prevent diffing out, but that same loading tends to reduce turn in, and puts additional load on the tires mid corner.
Gear diffs are largely based on rolling contact, they don’t vary much with motor load. They need to be loaded with fluid to prevent diffing out, but that same loading tends to reduce turn in, and puts additional load on the tires mid corner.
Since we are talking about gear diffs, is it possible to have a gear diff react and drive like a ball diff would given it's mechanical function?
Last edited by Autocratic; 02-05-2012 at 08:44 PM. Reason: Dave H. post
02-05-2012, 08:42 PM
#29
Try to be reasonable and mature about this discussion please.
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
02-05-2012, 08:44 PM
#30
Try to be reasonable and mature about this discussion please.
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
I read the previous link posted on gear vs. ball and all I saw was people saying "I think" and then giving their explanation.
Nobody in that thread, or this one, has been able to answer and provide evidence why a ball diff has provided other people with faster lap times.
If you don't have anything to add to the thread that will advance the discussion in the proper direction, then please hold your posts.
