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hi everyone. i own a non worlds bj4 and have fitted an LRP Sphere comp 2007 with an x11 6.5t motor. i was told to run a 14t pinion but when meshed correctly the motor is too close to the drive cup which is rubbing against the motor
![]() thanks very much
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Matt Myers Team Associated b4 Team Associated b44 |
#2
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14 is a bit small
i run a 19 pinion with my 4* (bout 5.5 i believe) see what others say |
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what size spur are you running ???
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i think its a 78 but am not fully sure
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Matt Myers Team Associated b4 Team Associated b44 |
#5
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well i used to run my 6.5 in my S4 (same drive train as bj4) on a 18/81 so if your running a 78 spur the put it on a 17 or even an 18 ..
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#6
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78x17 would give you a overall ratio of 10.323
which isnt to fare of for a 5.5 4*
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Mattys the driver,my names carl
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ive got 78x17 as a ratio of 11.47 ??? thats for an S4
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#8
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Sounds a bit over geared does that carl??
Last year I was told to run 13:00 overall ratio by Jurgen himself with the 3star. thats a 15t pinion on the Worlds car. At the weekend I was running the 5.5 motor in my Tamiya 501X with 12.6 ratio (15/87) |
#9
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so are you saying i need a 16/17t pinion with my x11 6.5 and 78 spur??
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Matt Myers Team Associated b4 Team Associated b44 |
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yes matt , thats what i would be looking at running. try 16 1st see how you get on ..
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#11
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sorry for this but the spur is actually a 72
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Matt Myers Team Associated b4 Team Associated b44 |
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so im guessing by that the 14t pinion is actually correct then
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Matt Myers Team Associated b4 Team Associated b44 |
#13
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okay, im very confused now lol
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Matt Myers Team Associated b4 Team Associated b44 |
#14
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i would change the spur to be honest matt ..
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same i would put the spur up to something like 78 or even 81. Then i would increase thje pinion size by a few to around 16-17 maybe higher.
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B4 5.5 L4 19T RC18t Mamba 9200Kv
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#16
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this is on my non-worlds car, and am not sure a 78 or 81 will fit as the 72 is almost level with the chassis already
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Matt Myers Team Associated b4 Team Associated b44 |
#17
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Get a Worlds Edition!
I never ran anything smaller than a 17t on the origonal car but I think that fitted no problem. Based on how I've been gearing my 5.5 recently i the WE you might get away with a 15t, but 14t is what you want to gear it on really. I think RW make some white machined spur gears that you can get in 73/74 ect that would fit, so long as it doesnt stick out below the chassis you'll be fine. |
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i would, but they cost more money, of which i dont have
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Matt Myers Team Associated b4 Team Associated b44 |
#19
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I gear my 5.5 X11 at 12.65 (16/81 in the WE).
12:1 might be a bit on the high side, put the smallest pinion you can fit on and run it for a minute or so, stop and check how hot it is. |
#20
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do yoo think it will be ok if i fit a fan to the motor?
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Matt Myers Team Associated b4 Team Associated b44 |
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