K-O-H 2013 With LR content

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Originally Posted by ashtrans

I would suspect the needle roller bearing on the end on the pinion failed due to the side forces of running the high 9 gears on the coast side, then the gears come partly out of mesh and the teeth then come off, these needle bearings have failed before on the rear 4.11 true high 9 gears that Jim was previously running, as per my previous post, the problem is running the true high 9 gears on the coast side, pegging may have helped but it is just a way of trying to contain this side force, to make it reliable you have to change the tooth pressure angles like we have with our force 9 ring and pinions, I have shown true high 9 how to do this about 2 years ago but I don't think they have done it on any yet, certainly Jim's ones were not modified,

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Do your R+P from the Force9 bolt into a Tru Hi9?

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Originally Posted by Bush65

Further to that last comment, the legs of an A-frame are not links in the true meaning of link (can resist only axial loads).

Many years ago, I was contemplating a triangulated 4 link for the rear of my bushie. The problem was that the chassis rails are too close together and the triangulation angle is too low, resulting in high forces unless you use short upper links.

The high axial plus bending forces from the low angle in an A-frame, are probably why the stock unit has such massive arms. The longer A-frame in the GP rover will suffer even more.

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The stock LR A Frame is 40-45 degrees of trainagulaion combined angle from bush center to ball center. I believe that you dont want to go much under this to have decent lateral axle control. I was thinking (and disregard geometry for a minute) what if a person made the chassis mounts on top of the chassis rails to get further speration left to right. This on a longer A frame would retain some angle. Yes the arms would have to bend up and out and require some smart design. And I do understand that would mean the arms having to be stronger, but would the fact that the bushes are now further apart help somewhat?

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Originally Posted by uninformed

The stock LR A Frame is 40-45 degrees of trainagulaion combined angle from bush center to ball center. I believe that you dont want to go much under this to have decent lateral axle control. I was thinking (and disregard geometry for a minute) what if a person made the chassis mounts on top of the chassis rails to get further speration left to right. This on a longer A frame would retain some angle. Yes the arms would have to bend up and out and require some smart design. And I do understand that would mean the arms having to be stronger, but would the fact that the bushes are now further apart help somewhat?

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I'm pretty sure this would mess up the anti-squat geometry, never mind the clearance issues.

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Originally Posted by uninformed

Do your R+P from the Force9 bolt into a Tru Hi9?

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Yes, I can't think why they wouldn't

Dave

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Originally Posted by Red90

I'm pretty sure this would mess up the anti-squat geometry, never mind the clearance issues.

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I guess you missed the bit where I said, (and disregard geomtery for a minute)

but go on, explain the clearance issues....

here is one of Team Gigglepin's videos from there week racing in the USA.

[ame=http://www.youtube.com/watch?v=h56uo7sYkd0&feature=player_embedded]KOH overtaking - YouTube[/ame]

some great footage of driving and winching :cool:

Winching quicker than most could drive it, LIKE IT!
:D:D

JC

some of the faster stuff:

KOH Thru the small whoops and onto the fast stuff - YouTube

driving and winching "Backdoor"

KOH Backdoor - YouTube

Thanks for your support folks,

here is a link to my Team Gigglepin write up:

https://www.dropbox.com/s/yd0qcgfqf4e32eq/KOHpdf.pdf