19Turn Spec in a B4

[cutting edge]

Can i run my sons B4 with a 19Turn Spec motor in i know most are run with around a 10 to 13 turn motor but he is only 6 and i dont want him to have an uncontrolable car But on the other hand i don't want to Fry 19 turn motors either ????

Any Gearing suggestions would be great as well cheers......

He will be running on Grass/Dirt

[mark christopher]

yes definatly, york club have a class for the tamiya silver cans, i have no idea on gearing though

[tc2k]

Mate, a 19 will be great in that buggy. I run a 19 in mine for most club meetings, im not an amazing driver but it gets me round the track and with good cells they fly!
I think I run 24/81 in mine

[DCM]

depends on his ability, if he is just learning, put a 27t stock motor in it, that will be quick enough, on something between a 24 and 26 tooth pinion, when he is ready to go 19t, you can gear up to about 28tooth, depending on track.

[ashleyb4]

Many people seem to run modified motors but alot of people do run 19t motors id you get a 19t motor you will need to run it on a 22 tooth pinion anythign higher will over gear it and it will last maybe 2 runs before it needs skimming.

A

[jimmy]

Personally I run my 19 between about 24/25 and up to around 28 in the b4 with standard 81t spur

I think a 19 is too fast though for your lad, a silver can 540 motor is what you need. Vicky now runs a hammered 27 stock motor after starting out with a 540 silver. Theres no way she is ready for a 19 turn yet - I have forbidden it!, she'll just make more work for me to fix.

[tc2k]

22, I run a 21 on my 12 turn. 22 is way too low, a 24 is about right

[DCM]

24 on a tight track, maybe, but 19t is more torquey so can cope easily with being geared high, I reckon you will run out of space for meshing on a big track before you run out of grunt.

[ashleyb4]

I went by the manual and what i have been told i ran a 24 pinion on my reedy 19t quad spec i had it skimmed at oswestry national (didnt run it then) then went to marston regional did 2 runs and it needed another skim as it had over heated.

But back on topic i think a 27 silver can will be best for a young driver.

A

[DCM]

a motor can overheat from being undergeared to you know.

[ashleyb4]

I know but thn i put it back down to my 22 and it hasnt been skimmed since. and marston regional was ages ago.

A

[PaulRotheram]

depends on motor, batterys andtrack conditions.

On 19 turns i use 23-24 pinion depending on the layout of the track using 4200's.

[tc2k]

Im a bit confused.
Is everyone using the 24 with an 81 or 84 spur. The kit spur is 81, pretty sure I'm running that.

Also, 2 runs out of that motor, even slightly overgeared sounds bad. You sure its not the motor, running 24/81 with my 19turn V2 motor, I ran the Mike Leonard endurance (about 1 hour total running) and 2 club nights and the comm still doesn't need a skim.

[PaulRotheram]

24/81

[tc2k]

Ahh, thats reassuring. BTW, not trying to hijack the thread but would you say 21/81 is about right for a 12x1 indoors

[DCM]

81/24 for a stock motor, 81/25-27 for 19t

[PaulRotheram]

tc2k, what track and what type of motor? I ran my Reedy Kr 12x1 on 24/81 I imagine a V2 would be nearer 26 (they like to be geared up) and a checkpoint about 25.

for smaller tracks i'd gear one lower, i never go higher though.

[tc2k]

Wait a minute, why are you gearing it closer for a faster motor, dont you do the opposite.

[PaulRotheram]

because 19 turns arnt modified, they are quite strange motors! We gear 19's seperately because they are different in ways.

10- 22/81
11- 23/81
12- 24/81
etc
etc
then 19 turn comes and it needs a completely different gearing, bit bizzare.. but the way it works! I run 19's alot in a club series and 23/24/81 works best for me.

[tc2k]

Hmm, Im not quite with you, running a 21 pinion in my b4 with my 12 V2 is about right, I went 2 teeth higher and the motor came off baking. You sure thats not with the 84 spur?