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Old 06-14-2007, 01:39 PM   #13081
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This question has probley already been asked but I'm going to ask it any way. I got a Novak GTB and tried to run a 4.5 but I can't get a small enough pinion on without it rubbing against the pulley to get the right gear ratio. Then I tried running a 13.5, but then I couldn't get a big enough pinion on without it rubbing against the servo horn. Does anyone else run the original JRXS with brushless?
I run the 13.5 on a big open track (because the gas guys like it that way)with a 118/47 giving me a 4.59. The motor only get to a temp of 120 and a couple of other 13.5 brushless have a little more top end so I am going to put the 41 tooth dif gear on both the front and back difs to reduce the internal ratio so I can get a smaller final gearing.
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Old 06-14-2007, 01:44 PM   #13082
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i just purchased the orion vortex 3.5 brushless motor.. i just want to know will the drive train on the jrxs be fine with that motor?? it will only be run with 6 cells.
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Old 06-14-2007, 05:08 PM   #13083
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It'll probably be fine other than you might just have to run the belts a tad looser.
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Old 06-14-2007, 05:24 PM   #13084
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why run the belts looser with that much motor?

run them so they don't skip, just as you would set the belts with any ohter motor. the drivetrain of the jrxs can easily handle that much power if everything is in good working order.
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Old 06-15-2007, 07:20 PM   #13085
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Quote:
u tried a different spur combo to get the gearing u are lookin for?
I tried all different combos, the one pictured on the car is 118/37 for the 13.5.
If you close you can see that I have the wheels turned and the servo horn is just barely touching the motor.

Quote:
I run the 13.5 on a big open track (because the gas guys like it that way)with a 118/47 giving me a 4.59.
So I don't see how you can be running a 118/47, unless you have a different servo horn or some kind of option on your car to give you more room.

Any help would be greatly appreciated!
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Team Losi JRXS-000_0111.jpg   Team Losi JRXS-000_0113.jpg  

Last edited by R.Fenstermacher; 06-15-2007 at 07:32 PM.
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Old 06-15-2007, 07:27 PM   #13086
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woops
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Old 06-27-2007, 10:28 PM   #13087
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guys... i'm from indonesia, i have a race on 8th july, and i will use my gtb with 4.5r motor... what spoor and pinion i should use to get the best result, i might use also a 37/63 foam tyres.. thx
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Old 06-28-2007, 12:28 AM   #13088
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Does anybody have any of the older style front a arms they want to sell off
I need a couple sets of arms cheap so I cna get mine back up and running
I will be running it on carpet oval only
LMK Thanks
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Old 07-07-2007, 02:55 PM   #13089
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Quote:
Originally Posted by R.Fenstermacher View Post
I tried all different combos, the one pictured on the car is 118/37 for the 13.5.
If you close you can see that I have the wheels turned and the servo horn is just barely touching the motor.



So I don't see how you can be running a 118/47, unless you have a different servo horn or some kind of option on your car to give you more room.

Any help would be greatly appreciated!
I think it is a small Kimbrough servo saver.
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Old 07-16-2007, 08:15 AM   #13090
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Quote:
Originally Posted by R.Fenstermacher View Post
This question has probley already been asked but I'm going to ask it any way. I got a Novak GTB and tried to run a 4.5 but I can't get a small enough pinion on without it rubbing against the pulley to get the right gear ratio. Then I tried running a 13.5, but then I couldn't get a big enough pinion on without it rubbing against the servo horn. Does anyone else run the original JRXS with brushless?
Same here, I'm running the GTB with 4.5R sintered rotor and can only get 10.2 FDR (128 spur with 23T pinion / 64P) but still having thermal shutdown problems. I can't seem to fit a 22T pinion without the pulley rubbing on the motor's end-bell.

Anyone here can suggest anything to get the correct gear ratio. Does Losi make bigger spur > 128T for the JRX-S???

Thanks.
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Old 07-16-2007, 09:04 AM   #13091
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i'm new and not well versed on gear ratios, i'm trying to run a 9x2 motor on a 128 spur/ 24 pinion and it feels really hot. what should i be running?
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Old 07-16-2007, 03:07 PM   #13092
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I have a bunch of spare parts for the JRXS in the for sale thread for a great price. http://www.rctech.net/forum/showthre...22#post3489922
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Old 07-20-2007, 11:31 AM   #13093
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hi,

could someone post some pictures on how there cells are sat in the car, as i have just got some new cells soldered up and just cant get the buggers in

TMUK
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Old 07-20-2007, 11:47 AM   #13094
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are you soldering the wires to battery bars? you have to solder the leads straight to the battery. take a dremel and scuff the places you want the solder to stick to and solder you wires in. they should work then.
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Old 07-20-2007, 11:54 AM   #13095
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the packs soldered Side by side with Corally 4mm tubes, i can get the rear end of the pack in but the front will not go in
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