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  #21  
Old 10-17-2010, 11:08 PM
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THANK YOU for noticing that. I forgot there was any fee here. I support the policy but wish it had an auto notification feature or something. Oh well here's the pics!
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  #22  
Old 10-17-2010, 11:41 PM
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So this would put the motor transverse and have it driven off the front sprocket shaft?
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  #23  
Old 10-17-2010, 11:53 PM
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Couple more.........
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  #24  
Old 10-17-2010, 11:55 PM
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Quote:
Originally Posted by DJPyro View Post
So this would put the motor transverse and have it driven off the front sprocket shaft?
That would be correct and including needed header clearance if mounted normal the overall length is actually shorter being transverse.
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  #25  
Old 10-20-2010, 11:16 PM
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Do you still have 6 speeds in the engine?
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  #26  
Old 10-20-2010, 11:28 PM
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An 091 is a 4-speed box with reverse. You probably already know this but it was used in the 1970s era VW bus, if I recall correctly.

masterfabr - Cool idea by the way! Hope it works out for you.
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  #27  
Old 10-20-2010, 11:52 PM
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^ Yeah, but if you go off the sprocket drive, you're after the transmission on the bike, so in answer to your question bronco, yes. You have that and then essentially a gear reduction before your final drive.

There was a guy on a mini buggy forum that used a civic tranny for a FNR box on a 'busa buggy and he loved the fact that he could change his effective final drive ratio for different scenarios.
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  #28  
Old 10-20-2010, 11:53 PM
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The 091 is a 4 speed VW transaxle .Yes they have reverse. I use the Busa transmissions 6 speeds to do all the shifting duties. I only shift the 091 for reverse or I can choose a final drive ratio of
6.35:1 if using 4th in the 091
8.11:1 if using 3rd in the 091
I can also use first or second in the 091 for ridiculously low gearing if wanted.Not necessary though unless in some really tight ,slow trails. Final designs will likely only have functional reverse,3rd and 4th. Using all weddle stuff inside should make for a really stout secondary transaxle.
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  #29  
Old 10-20-2010, 11:54 PM
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The beauty of this design is that there are no unlubed wear parts. All oil bath. Chain issues are a thing of the past.
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  #30  
Old 10-21-2010, 12:01 AM
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Actually for a busa the ratios are lower than I wish so there is a new box being done that will be approx 15% higher.For a 2000# loaded busa car that should be about right. Weddle has a great range of ratios available.
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  #31  
Old 10-21-2010, 12:10 AM
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What is your projected price range of this box?
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  #32  
Old 10-21-2010, 12:21 AM
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Working on adapter price now. Thhe 091 cost depends on what level of build it gets.At this point it appears it should be in line with most of thesingle speed FNR boxes out there but having 2-4 drive ratios available it the pull of a shifter handle.
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  #33  
Old 10-21-2010, 05:24 PM
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just the box? with the transaxle?
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  #34  
Old 10-21-2010, 10:49 PM
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Smile

Well one of the best current choices,the Jeffco at about $4K ,is about the same cost or a bit more than a fully built 091 using all Weddle internals. If only planning to use 3rd and 4th as I will then you can deduct maybe a thousand from that. The coupler is still being priced out. I'll let you guys know as soon as we determine a final price. What would be fair? LOL!!!!!!
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  #35  
Old 10-22-2010, 12:14 AM
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I can only imagine the amount of time and money in developing this project.

I think most buggy builders will compare their options, RPM $2500, Jeffoc (with diff) $3500
Granted this design hopefully resolves the chain heat issues of the MC engine cars, but if it costs a whole lot more, I fear many builders will go a different route.

My hats off to you- visionaries like you are what keep new products coming to market and help keep this sport/pass time so innovative.

Maybe outsourcing the manufacture would help lower the market entry costs??
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  #36  
Old 10-23-2010, 12:08 AM
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Time has been tremendous. I can't really make an accurate guess but in the MANY hundreds of hours is a safe bet. Cost,of course,is the primary factor for most. The RPM,Jeffco are great boxes within their capabilities. Their Achilles heel though is the open,unlubed chain. Unless the car is designed with a large front sprocket and as long as possible chain heat WILL kill the chain. It's a constant source of maintenance for most minibuggies and the problem is worse as we try to build larger minis and 2 seater mid size cars with big bike engines. My thinking behind this setup is for the larger Busa powered stuff ,say 1200 pounds and over . In that category,IMO,there is nothing that really fills the need. I'm hoping testing will continue to confirm my idea is sound at least.
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  #37  
Old 10-23-2010, 12:14 AM
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As for outsourcing,I have my own machine shop. Heat treating capability is in house also. Only thing I currently have done out of house is splinine broaching. Biggest component cost is the chain and sprockets. I plan on doing my own sprockets after testing is done. That'll drop each adapter cost by over 400 bux right there. Other than that there isn't much to save on. I may do casting in the future tho if enough interest is generated in the unit. Doesn't need to be billet.
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