008 and brushless gearing

[Nes]

Hi Everyone,

Just wondering what every one is doing with regards to gearing the 008 with brushless motors as they seem to have a much lower ratio.

To get 6.8 on my 008 currently i would have use 84/29 which won't fit :eek:

I know changing the spur and pinion combination to a lower spur and higher pinion will be the way to sort this, but i just wondered what the general consensus is with anyone running 13.5 or 10.5 brushless sytems in their 008. Im tempted to change to 64p but im just wondering what spur and pinion range to go for.

Any advice appreciated :)

Ian

[jamrowls]

10.5 - 75/29 - 6.14
Which then needs a 25 pinion to run a 19t at 7.13.

The smallest pinion that can be used with a 75 spur is a 29 because then the motor hits the upper deck, however it could be dremeled allowing down to a 23.

So with a 75 tooth RW spur you can use pinions from 33+ to 29 and if you dremel the top deck down to a 23 (5.40 and lower to 7.74). I dont own larger than a 33 but a least a 35 would fit proably more... if you can buy them that big?

I did buy a 66 tooth spur aswell but thats too small, and that was enough money wasted testing spurs for me.

I will get the xray 78 and 81 when they come out but im guessing they will still need a top deck cut or be too big.

[SteveB]

Im running 10.5 but with 64 DP gears.
Spur 106
Pinion 43.

I am in the process though of changing the lay shaft gears to give 1.9 internal ratio but you need a rear belt off a Yokomo BD and the front off an Mi3 (waiting to try the front because they are 3.5 wide instead of 3mm) to give me better gear options.

[Nes]

is there much room for change with that gearing Steve? Ie can you go up and down quiet easily with no space issues?

Also are you using the RW spurs?

Thanks

[Nick Hudson]

Im running 10.5 but with 64 DP gears.
Spur 106
Pinion 43.

I am in the process though of changing the lay shaft gears to give 1.9 internal ratio but you need a rear belt off a Yokomo BD and the front off an Mi3 (waiting to try the front because they are 3.5 wide instead of 3mm) to give me better gear options.

already done this - works very well but you need to do the following :-

20t pulleys
sand the outer face of the front belt centre pulley (there is a raised lip and centre boss on this face) until they are flat with the rest of the pulley. (reason for this later)

place a 0.5-0.7mm thick rear axle shim from a 1/12th car over the centre shaft (or any large diameter shim of that thickness - you could even make one from a bodyshell offcut making sure the o/d is smaller than the pulley teeth diameter), fit the drive pin and sanded pulley then the 'e' clip. the sanded pulley and shim move the pulley out approx 0.5mm so the belt fits nicely and the 'e' clip fits as before. don't be tempted to force the 'e' clip back on as it will distort the pulley. keep sanding the pulley until everything fits properly.

no need to do anything to the rear centre pulley as the BD belt is 3mm wide


as far as i can see its a win-win situation with this :-

(a) better stock/19t gearing even with the std 84t spur
(b) the belt is now well clear of the pinion (i'd still use the shorter grub screw though)
(c) you can always go back to standard gearing for modified if you wish


the whole change took 15 mins

hth:D

p.s.....yes i know we shouldn't have to be doing this but hopefully xray will take note and help out us stock, 13.5 / 19, 10.5 drivers by bringing out a 63t (189mm) rear belt and 171t (513mm) front belt both 3mm wide which will fit with no mods at all when used with the 20t centre pulleys - we live in hope !!!

[SteveB]

is there much room for change with that gearing Steve? Ie can you go up and down quiet easily with no space issues?

Also are you using the RW spurs?

Thanks


Down in pinion is not a problem but I can only go up to 45 T. (FD Ratio 5.5)

It is with RW Spur and pinions.
To fit the spur I had to sand the spacer on the lay shaft on the side of the rear belt down by 0.5 mm. Plus i had to file a couple of the large holes on the spur to get the hex driver to the motor screw.
Pinion wise grind 0.5 mm off the grub screw and make sure there is no bur around the grub screw hole on the pinion.

Nick

Some good info there for fitting the wider front belt, should be getting one tomorrow.

[kev kirk]

Hi All
Finished building my 008 yesterday. I fitted the front multidiff and rear diff from my T2 together with the two center pulleys after a few minutes with the dremmel. I didn't fit any shims anywhere. I have set the front multidiff to solid to keep the recommended setup
I was thinking of altering the inner battery holders with some araldite to take up the freeplay in the battery slots and move them away from the pinion, anyone else tried this?
Cheers
Kevin

[Slim_Shady_01]

i see RW have now produced a range of offset spurs specificaly for the 008 cars ranging from 90 to 110 in 64 dp and 70 to 86 in 48 dp i dont know if more are on the horizon but personaly i hope so as there are folk out there who need the bigger sizes 112 113 114 in 64dp, im sure the range available now will help some of you struggling to get to your desired gearing for brushless

[Luke da Machine]

hi their i have purchased some 74 tooth spurs what have been manufactured to fit the 008 (rw) .i am running a 10.5 brushless at 6.5 end ratio and isnt a problem. i can go down to 5.3 and up as high as i like, there is one little tip file a tiny bit off your top deck corner.

[Luke da Machine]

forgot to say they are 48 dp.