K-fab Short Course Super Buggy

[Bugpac]

Originally Posted by K-fab

I have a 930 CV outer sitting here beside me.
No room at all for redrilling - I thought that might be a good idea. There's only .070" wall thickness between the bolt holes and the OD, so that won't work. The bolt pattern places each bolt between each of the ball's lands with about .130" clearance.

Do you recall the dimensions on the bearings you're talking about? ID of 4.25 with an OD of???

Most of the tapered roller bearings I've found are 6.25 or larger OD. I can live with a 6" OD, but I'd really like to find one that's closer to 5.25 to 5.5.

I can find low profile precision ball bearings, but the tapered bearing is elusive.

no i dont, and the only one i did find was on ebay, an skf dealer.... its been 4 or 5 mo since i looked.... 8)

[Bugpac]

to bad you couldnt turn the cv od off, then machine the bearings inner race to re clearance the bolt holes, or would it be to hard of material... or machine the cv to be the inner race itself... cut small groove for the balls to roll in...just a thought maybe a miracle if you could do... 8)

[Bullnerd]

Ok ,i saw the machine with the doors open ,thought the gaurds were removed. ops:

Prototraks are cool ,we have one too.love to have one at home. 8)

Where do you buy your RPM trannies from?Or is there only one place to buy them ,The man .I dont see why more people dont use them,seem pretty reliable.

Any progress?

[K-fab]

Originally Posted by Bullnerd

Ok ,i saw the machine with the doors open ,thought the gaurds were removed. ops:

I take it you've never been around one when the coolant's flowing? Not pretty. :shock: The thing will cover you in a heartbeat! - I sure was surprized the first time it showed me. Doors are a must. I want to say it pumps something like 13 gallons a minute at a fairly high pressure through the spindle.

Originally Posted by Bullnerd

Where do you buy your RPM trannies from? Or is there only one place to buy them, The man. I dont see why more people dont use them,seem pretty reliable.

Any progress?

Dan Roberto is the only one making the RPM box. He's been doing it since the mid 80s, from what I understand.

You can purchase directly from him, if you can find his contact info - he has no web site, just a phone number - or you can purchase one from [url=http://www.atvracing1.com:1fhxwktz]ATV Racing[/url:1fhxwktz] or [url=http://www.desertdogoffroad.com:1fhxwktz]Desert Dog Off Road[/url:1fhxwktz] too.

They are fairly bullet proof. The biggest downfall is the panic or hurried shift. You have to let the drive train spin down to idle before you try to shift from foward to reverse (or vice versa) or it tears teeth off the intermediate shaft - which then removes teeth and bearings everywhere else. It's not pretty. (don't ask me how I know this - twice...)

Progress - uhm...
I'm learning Mechanical Desktop and Inventor right now. Been working on drawing up all the parts I have. Doing a 930 CV model's a biatch... I have the main parts done, but getting the grooves cut in at the correct angle's a bit of a challenge. I'll get it soon, I'll get it soon.... - I'd post a pic of my incorrectly grooved CV model, but I don't know how to capture it off of Inventor

I have to get the front spindles, hubs, rear hubs and carriers designed before I start working on the rest of the car. Start at the wheels and work inward.

[Bullnerd]

We use mostly fadals(coolant pressures kinda lame) ,but ive hit the coolant button plenty o times with the doors open.

I used to work with a guy who did a lot of mold work ,and they used to remove all the gaurds ,so they could clime right in there and polish and such, without removing the work. Thought maybe thats what you were doin.

Thanks for the info on RPM.How do like them ?Can you run them with sprocket instead of cvt?

I have solidworks 98 but really strugling to learn it.(puter dufus)

[K-fab]

Man - running w/o the guards. NO THANKS!!! :shock:

I love the RPM boxes. They've proven themselves well.

Yes, you can use a sprocket for input. Get in touch with Jay at Desert Dog. He runs a Busa thru an RPM box in his cars.

[Bullnerd]

I'm thinking of building the rorty r82s ,and would like to run the rpm box .But dont think i can swing a modern ski engine like your doin .Prolly stuck with a bike engine. Like the cvt ,but not sure if its worth it to try to adapt to bike motor.

Really like the look of your dez and rorty is the only one selling plans that seem similar in design.I dont feel like trying to design a whole car on my little experience.

Any opinion on the r82s.

Thanks for all your input .Again

[K-fab]

Well this is a real kick in the nuts...

CORR is splitting up. The head honchos moved CORR's operations out west this past year - it wasn't supposed to affect the Mid-West races.

Now I find out that the two sections (West & Mid-West) are fighting and have split. :x

I'm not about to get involved in racing w/CORR again while this sort of shit storm's going on. I got caught up in it when SODA was taken over by SCORE and we lost our class (Stadium Lites), lost a lot of the amature racing and such.

So, for the time being, I'm putting the K-fab CORR car on the back burner. I have to see where they're going before I spend a bunch of time, effort and cha-ching on building a car that may not have a place to play.

Damn.

[ProtoDie]

What a bummer, at least you were not too far into it.
Is there any other series around worth building the car for?
I am not that familiar with it, but have you raced MAORA before? I know they run in the midwest, but I am not sure what level of racing they are, or how they pay out.

Mid America Off Road Association
Short Course and Endurance Racing

I know a guy with a 1300 busa drakart that ran a few and wants us to give it a run.

[K-fab]

I know of MAORA, but, to be honest, I'm tired of dealing with the smaller racing groups. Been there, done that. I know it makes me sound a bit like a spoiled child, but the smaller groups tend to have more issues and internal strife and I'm wanting to get away from this stuff. I'm looking to go race with the big dogs such as SCORE, BITD & CORR.

The guy with the Busa Drak was allowed to race out west a few rounds, but CORR decided that his car didn't meet rules, so he's out. - at least on the west coast. Dunno....

I'll wait until I see what happens w/CORR and the Mid-West guys.

Thanks for the heads up, though.