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Old 04-10-2009, 01:48 AM   #691
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hey,

I'm running a t2 009 eu specs with fixed diff on the front. My club track has a huge "parabol" after the straight line so we're going full speed on the parabol.

Problem is that with the fixed diff, has one wheel / shaft is rotating at a lower speed due to the parabol... one of the wheel hudy shaft is bending, "swirling"... I assume only solution is to remove the fixed differential and replace it with the same differential that I've on the rear.

The consequence of this bended shaft is that it's "OK" for having fun .. but when you turn, it makes a vibration on the wheel ... and that's quite undriveable at high speed

Weird !

Cédric
Hi, I'm running same config in my 008 for mod - graphite grease has to help with those vibrations - but not completely - there is another solution for this - ECS shafts - it really does work. I've got them on my 009. However, I haven't bent even one standart shaft for whole time I'm running 008 car.
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Old 04-10-2009, 01:56 AM   #692
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Thanks for the reply.

I've got both choice
- Remove the solid axle diff and put the same differencial that I've on the read
- Keep the solide axle diff and use the ECS shafts.

Price is close to be the same

Cédric
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Old 04-10-2009, 02:58 AM   #693
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Thanks for the reply.

I've got both choice
- Remove the solid axle diff and put the same differencial that I've on the read
- Keep the solide axle diff and use the ECS shafts.

Price is close to be the same

Cédric
Hi Cédric,

I would keep the solid axle and use the ECS drive shaft
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Old 04-10-2009, 03:03 AM   #694
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Thanks a lot for your help - I will do so

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Old 04-10-2009, 05:05 AM   #695
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Yep, I found it, but it had nothing to do with with 180 degrees it went in. The HUDY graphite grease that comes with the kit... which the manual says to use on the outside of the little coupler cylinder... tured into like a glue. The cylynder would NOT spin in the dogbone... heck, I could BARELY press it back out. Once I got it out... cleaned the cylnder and inside of the dog bone out of all the dried graphite grease... it now moves free as butter.

Shame on you, HUDY graphite grease!!! it dries right to a glue.
Must be some duff stuff!

Get some graphite grease from the model shop as it will help prevent a lot of wear in the driveshafts.

Also, be carefull about the amount of tension you put on the grub screw for the pin, too much and it can bend the pin slightly causing problems.

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Old 04-10-2009, 05:13 AM   #696
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Originally Posted by okayplayer View Post
hey,

I'm running a t2 009 eu specs with fixed diff on the front. My club track has a huge "parabol" after the straight line so we're going full speed on the parabol.

Problem is that with the fixed diff, has one wheel / shaft is rotating at a lower speed due to the parabol... one of the wheel hudy shaft is bending, "swirling"... I assume only solution is to remove the fixed differential and replace it with the same differential that I've on the rear.

The consequence of this bended shaft is that it's "OK" for having fun .. but when you turn, it makes a vibration on the wheel ... and that's quite undriveable at high speed

Weird !

Cédric
Hi Cedric, do you have link to some pictures of the track?

We have a variety of tracks here in the UK that the top guys run on, most of which have what we call 'sweepers' (long fast corners at the end of straights that are entered flat out), but all the top drivers use spools (fixed diff).

Although the inside wheel normally vibrates we never notice it on the track.

How much steering lock are you using?

Skiddins
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Old 04-10-2009, 08:50 AM   #697
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Strange - I never had problems with graphite grease. It works for me very good everytime. I have problems when I forget put it in - there is more stress on axle. I deffo advice to use graphite grease - maybe you got bad batch of graphite grease?!
Grease is supposed to stay soft.. like grease, right? Well the HUDY graphite grease that came with both of our cars, dries right up like a glue after 5 or 10 minutes. Know the little coupler guy? Well.. I even had a hard time pressing it back out. When I build it without grease, the drive shafts are smooth as butter.

So the steering problem, was when both driveshafts were in teh same position, and turning the front wheels had to rotate the couplers on both corners are the same time. The steering was so stiff that I could barely rotate it with my hand (no servo in the car at the moment).

So... should I use the white differentail grease instead, or buy different graphite grease online? THanks

Cpt.
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Old 04-10-2009, 09:52 AM   #698
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Grease is supposed to stay soft.. like grease, right? Well the HUDY graphite grease that came with both of our cars, dries right up like a glue after 5 or 10 minutes. Know the little coupler guy? Well.. I even had a hard time pressing it back out. When I build it without grease, the drive shafts are smooth as butter.

So the steering problem, was when both driveshafts were in teh same position, and turning the front wheels had to rotate the couplers on both corners are the same time. The steering was so stiff that I could barely rotate it with my hand (no servo in the car at the moment).

So... should I use the white differentail grease instead, or buy different graphite grease online? THanks

Cpt.
When applied, what color is the grease that came with your kit? Red, Black, White, or Blue?
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Old 04-10-2009, 10:03 AM   #699
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When applied, what color is the grease that came with your kit? Red, Black, White, or Blue?

black... with maybe a TINY hint of purple
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Old 04-10-2009, 01:10 PM   #700
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You should always grease your driveshafts. Try Muchmore joint grease.
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Old 04-10-2009, 02:28 PM   #701
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Originally Posted by Cpt.America View Post
Grease is supposed to stay soft.. like grease, right? Well the HUDY graphite grease that came with both of our cars, dries right up like a glue after 5 or 10 minutes. Know the little coupler guy? Well.. I even had a hard time pressing it back out. When I build it without grease, the drive shafts are smooth as butter.
Really strange Graphite grease that came with my both cars were fine. Even after more than year it's smooth and soft. I haven't noticed any drying so quickly and causing binding. My shafts are always smooth.
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Old 04-10-2009, 03:35 PM   #702
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Really strange Graphite grease that came with my both cars were fine. Even after more than year it's smooth and soft. I haven't noticed any drying so quickly and causing binding. My shafts are always smooth.
Is there another aftermarket graphite grease you can recommend me? I obviously got some bunk grease.
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Old 04-10-2009, 07:55 PM   #703
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I have some noob questions for you guys, I hope you don't mind.

1.) The "internal drive ratio" of the 009 is 1.7?
2.) That comes from deviding the size of the front/rear pullies, by the size of the central pullies? (20/34).
3.) So running the stock spur of 84 teeth, what is a good starting point for my overall gear ratio for a medium sized asphault track, running a 17.5bl?
4.) Do guys shoot for something like 5.0? 4.0?
5.) Is "rollout" all that important in rubber TC? (i think i read somewhere that it isn't)

I need to know where to start when picking up a new set of pinion gears...

Thanks for the help as usual guys!

Cpt.
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Old 04-11-2009, 01:36 AM   #704
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Originally Posted by Cpt.America View Post
Is there another aftermarket graphite grease you can recommend me? I obviously got some bunk grease.
Unfortunately not - I've only used Hudy's.

Quote:
Originally Posted by Cpt.America View Post
1.) The "internal drive ratio" of the 009 is 1.7?
Yes
Quote:
Originally Posted by Cpt.America View Post
2.) That comes from deviding the size of the front/rear pullies, by the size of the central pullies? (20/34).
Yes
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Originally Posted by Cpt.America View Post
5.) Is "rollout" all that important in rubber TC? (i think i read somewhere that it isn't)
You can still use rollout from other guys. Reason why rollout isn't used in rubber is that everyone has same diameter of tires - that's why foam guys use rollout for defining their gearing.

I hope it helps. Regarding to your questions about gearing - I'm not helpful - I don't run 17.5T motors.
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Old 04-11-2009, 05:11 AM   #705
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Originally Posted by Cpt.America View Post
I have some noob questions for you guys, I hope you don't mind.

1.) The "internal drive ratio" of the 009 is 1.7?
2.) That comes from deviding the size of the front/rear pullies, by the size of the central pullies? (20/34).
3.) So running the stock spur of 84 teeth, what is a good starting point for my overall gear ratio for a medium sized asphault track, running a 17.5bl?
4.) Do guys shoot for something like 5.0? 4.0?
5.) Is "rollout" all that important in rubber TC? (i think i read somewhere that it isn't)

I need to know where to start when picking up a new set of pinion gears...

Thanks for the help as usual guys!

Cpt.
1 & 2 = Yes
3 & 4 = ~3.5 - 3.7; but the best way is to check you motor temps.
5 = lochness is spot on
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