musti72

I still can not understand how could they break... Im running them hard for 12liters(3 gallons) and they are still like new.

LiL_JaSoN

iTrader: (6)

thanks for letting us know, i also run them in my diffs.

did you check there was enough oil in there? let it sit for a while so all oil can sink around the gears (because they are small) or drill it, open it back up and re-fill?

maybe try running 2 steel gears (instead of 4), so see how it would hold up? it would end up weighing the same.

only prob is though, you would need to double to wt of the oil to achieve the weight you would normally use.

Riketsu

iTrader: (34)

Sorry guys, I was not specific enough.

The teeth of the composite gears look new. They all still look new. One of the big gears (the one at the outdrives end), broke on the opposite side of the teeth. The outdrive pin just chewed on that end.

I had been running mine for a few races. Just don't know exactly how many.

When I opened the diffs, it had all the oil there. So they were filled enough and were not leaking.

I prefer being 20 grams heavier than not finishing a race.

jelayne

iTrader: (4)

Thanks Riketsu, Mr. Hudy also spoke of this issue in their last Xray Column where 3 drivers broke in the final.

http://www.teamxray.com/teamxray/new...ec2997d488f64f

Pedro_Speedy

iTrader: (13)

Estoy de acuerdo !
I agree !

Drew Ellis

Guys we have been running them since the pre-worlds and have no problem, but I do know some of the team did have problems. I am not sure how they built them.

When I build Ralph's diff I always use new parts. You do not just want to change out the gears. The pin that is ripping up the back of the big gear needs to be new when using the lightweight gears. The pin gets alot of wear on it from the steel gear.

Thanks Drew

Speyederjedi

iTrader: (1)

Drew,

Thanks for the info. I'll be looking for some of those new parts which will be rolling out soon.

Regards,

Daniel

jelayne

iTrader: (4)

Drew do you all use brake springs between your brake pads ? The picture of Ralph's car is not that clear in that area.

thanks

Drew Ellis

Yes we use springs..

Thanks Drew

Riketsu

iTrader: (34)

Hey Drew,

can you please explain how the steering servo is mounted? What servo arm is used? Is it a low profile steering servo? I can't see from the pictures how the pivot ball can be mounted facing the pipe instead of an opposite direction.

Thanks.

gfilos

guys, do you know what is the effects of using 2 bevel gears instead of of 4 in the diff? is it all about weight?
Is the durability an issue? I think i read about some serpent guys using it in their cars during wc.

Also, what type of oil should be used when using 2 gears instead of 4? I suppose harder silikone should
be used, but how much harder?

kickass

iTrader: (6)

We here in down under also experienced mixed success with the composite, 1 driver running 4-5 meetings with no probs and myself the gears lasting 2 litres same pin issue, back to the steel for me!

Drew Ellis

The servo is mounted stock. The arm is the new alum. hudy arm for the 808. The servo is a 2367 kopropo. With this arm it has to be mounted on the front of it. We were braking the plastic one so we went with the alum. and have had no problems.

Thanks Drew

Osiris 75

iTrader: (18)

2367 KO?

Drew Ellis

Yes, sorry. Typing to early in the morning not good.

Thanks Drew