55LikesRC10B4/T4 Forum
03-01-2010, 12:24 PM
Tech Fanatic
iTrader: (20)
tuning options, such as rear traction, smaller spurs=motor closer to the rear wheels for traction. they do affect acceleration, in a way...a higher fdr comes from larger spurs which is more acceleration but less top end. different sized spurs for getting a fdr. a small spur is used for motors with higher numbers of winds such as a 17.5, you need a very low fdr for get a 17.5 to work well which a smaller spur will do. if you use a 87 with a stock, you will run out of room for such a large pinion, and people dont mike pinions that big to achieve a fdr so low with a 87 spur. the smaller spur lowers you fdr so you have room for larger pinions needed for 17.5 and 13.5 and so on.
larger spurs are used with lower wind motors such as a 7.5. you need a higher fdr for them which the larger spur creates. if you use a 72 spur, then you need such a small pinion gear to create a higher fdr, i doubt you can find a pinion gear that small anyways, plus you probably cant get the pinion to reach the spur. thats why they have different spurs.
larger spurs are used with lower wind motors such as a 7.5. you need a higher fdr for them which the larger spur creates. if you use a 72 spur, then you need such a small pinion gear to create a higher fdr, i doubt you can find a pinion gear that small anyways, plus you probably cant get the pinion to reach the spur. thats why they have different spurs.
So if I put in a 17.5 express duo2 with a Tekin RS I would want to go with say a spur in the 70's, but if I go with a castle creations 4600kv or 5700kv then a larger spur gear maybe even the stock 87 would be better.
03-01-2010, 12:39 PM
an 81 would sound good with the mamba, a 72 is perfect for 17.5
03-01-2010, 02:05 PM
Never happens to me either Dave with the improved bearings and hub...
No poor tolerances involve at all, , just using the wrong crush tube...
A losi car is stuck and the same problems using 3/8 bearings, they don't have the larger & stronger bearings available like Ae does .
03-01-2010, 02:15 PM
Again, I think the tolerance stack between the hub mold and the crush tube is off, the bearings are side loading.
03-01-2010, 02:19 PM
Tech Fanatic
iTrader: (20)
I am getting closer to understanding spur gear selection. I need some help from anyone with experience in these setups. Looking for spur/pinion combos for an indoor clay track with a T4.
option 1: Tekin RS with express duo2 motor (17.5)
option 2: Castle Creations sidewinder with 4600kv
option 3: Castle Creations sidewinder with 5700kv
THANKS IN ADVANCE
option 1: Tekin RS with express duo2 motor (17.5)
option 2: Castle Creations sidewinder with 4600kv
option 3: Castle Creations sidewinder with 5700kv
THANKS IN ADVANCE
03-01-2010, 02:29 PM
There's no right or wrong number for spur gear selection. The basic story is, if you need a really tall gear (like you'd need for 17.5), you will run out of adjustment range with the huge pinion you'll need to get there with a stock spur so you choose a smaller spur to allow you to get there. Opposite for the need for a high ratio.
03-01-2010, 02:29 PM
Too funny Dave , I don't even know what your talking about , the parts fit great and their life span last even longer than a Lois equip with just 3/8 bearings...
The smaller bearing is weaker , not cus its a Losi or a Ae bearing .
Cpt, the crush allows you to tighten down the wheel nut with out crushing the bearings ....
Scott has the part and don't feel bad .
Common mistake actually...
The smaller bearing is weaker , not cus its a Losi or a Ae bearing .
Cpt, the crush allows you to tighten down the wheel nut with out crushing the bearings ....
Scott has the part and don't feel bad .
Common mistake actually...
03-01-2010, 02:35 PM
I've been running the B44 rear hubs on my B4 for months on the same bearings... but I only use Avid bearings, AE's suck
03-01-2010, 02:37 PM
Ae bearing's are just as good as any available..
I know cus I use them all....
I know cus I use them all....
03-01-2010, 02:40 PM
Of course they are
Hey if you talk to Bridgewater can you have him check his PM's? I know he doesnt get on here much but this is the only way for me to ask him something
Hey if you talk to Bridgewater can you have him check his PM's? I know he doesnt get on here much but this is the only way for me to ask him something
03-01-2010, 02:45 PM
It's not the bearings I'm talking about, it's the accuracy of the assembly. The Losi's fit is better and it's bearings last way longer. I have both cars, the AE's wear fast, the Losi don't. I have not tried the larger hub/bearing combination because I added a shim the tube between the bearings and the binding went away.
03-01-2010, 02:51 PM
03-01-2010, 03:15 PM
Tech Fanatic
iTrader: (20)
There's no right or wrong number for spur gear selection. The basic story is, if you need a really tall gear (like you'd need for 17.5), you will run out of adjustment range with the huge pinion you'll need to get there with a stock spur so you choose a smaller spur to allow you to get there. Opposite for the need for a high ratio.
03-01-2010, 03:26 PM
03-01-2010, 03:26 PM
I run a 78 in my truck becuase the 87 would put the motor to far back. It would give you tons of forward bite but when it comes time to turn your just going to push. With all the torque brushless motors have you need to keep the motor forward to get the vehicle to turn on power.