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| Posted: Sat Aug 11th, 2012 01:48 am |
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1st Post |
Steve Miller
Member
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i was in the shop just now looking at a kart thats got an 820 on the rear . and it needs two .!! problem is..!! its really narrow rear hoop ..so im dreaming about a coupler and just one clutch .?? im thinking about spinning out a stepped coupler slip fit with off set keyways in it and then 3/4" od and scratch a keyway in it . if its a slip fit wont it be better .?? it can move few thou. side to side and it cant come apart unless one my motors falls off and i can slide the clutch back and fourth on the open 3/4" shaft .?? if it works like i been dreamin its gonna be nice ..with the off set keyways one motor will be at top one at bottom .. also shouldnt it start easyer be like a twin cyl .??
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| Posted: Sat Aug 11th, 2012 03:21 am |
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2nd Post |
Ted Johnson
Member
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Steve, Wes Shoemaker did a Siamese Bend setup back in the sixties. I think the hard part was the Siamese header setup. Never heard any more about the project. TJ
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| Posted: Sat Aug 11th, 2012 11:08 am |
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3rd Post |
Steve Miller
Member
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tj ., i got er all mocked up .!! theres room for small gem boxes they have about 1/4 to 3/8ths clearance .. i should have them hooked together today ..
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| Posted: Sat Aug 11th, 2012 01:11 pm |
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4th Post |
Ted Johnson
Member
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Wes Shoemaker had a single open exhaust that looked like he had mated two GEM stacks into one outlet. How he bolted them to the engines is anybody's guess. When I had Dave Bonbright build me the first two 610's, I seriously thought of doing the same thing, but I had them both built as RH engines instead. TJ
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| Posted: Sat Aug 11th, 2012 01:30 pm |
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5th Post |
Steve Miller
Member
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Tj ., im not going to be out much .. the kart i paid 120.00 for in rochester ny and i got motors off craigslist in syracuse 100 bucks for both and they each had torque converters i sold one converter for 100 and the other for 80.00 i started out with one engine then noticed the one the recoil stuck out the other way i checked sure enough a right and left drive ..they came off a twin engine sno -pony childs snowmobile ..?? they both had not one but two .032 headgaskets .and the tinyest hl,s in captivity .. i throwed the head gaskets in the bushes and used single .016,s and hl314a carbs . one more thing i cant beleave how hard the dang things pull over with a recoil the rope got yank outa my hand twice so far . kinda stings the ol fingers ..
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| Posted: Sat Aug 11th, 2012 03:09 pm |
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6th Post |
Dennis Schmidt
Member
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I remember the Shoemaker set up...wasn't that direct drive 'tho. I've seen a pair of 8 cube PP splined-shaft chainsaw motors coupled together with a clutch between them. It sounded neat.
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| Posted: Sat Aug 11th, 2012 03:36 pm |
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7th Post |
Ted Johnson
Member
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Dennis, I can't remember if the Shoemaker setup was direct drive or clutch. My Wisconsin buddy has the magazine, and I haven't looked at the article in three or four years. I like the idea of engines geared together. A single modern #35 chain would probably hold up fine, though I'm not sure if a single clutch would do the job. It'd take a strong electric starter to twist over two 820's, though! TJ
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| Posted: Sat Aug 11th, 2012 04:15 pm |
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8th Post |
ken moss
Member
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Why not run an axle clutch they look to have a lot more clutch lining in them then an engine mounted clutch and run it with a belt Ken
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| Posted: Sat Aug 11th, 2012 04:16 pm |
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9th Post |
| Posted: Sat Aug 11th, 2012 04:38 pm |
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10th Post |
Dennis Schmidt
Member
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I just thought of a kart that ran at Elkhart in the 60's that had 2 WB's (I think they were 700's) that were mounted one on top of the other. The top one connected via chain to the crank of the bottom. I'm pretty sure it had a recoil starter, I can't remember.
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| Posted: Sat Aug 11th, 2012 05:08 pm |
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11th Post |
Pruit Ginsberg
Member
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If you use a slip fit,I don't think the keys in the coupling will last long with all the up and down a kart engine does. Might be better to use a big ole square coulper like your tractor might have. Unless you want to machine inner and outer spline coulpers or use small drive shaft pieces.
Pruit
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| Posted: Sat Aug 11th, 2012 05:10 pm |
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12th Post |
Steve Miller
Member
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im almost done .. its gonna work good i think .?? im not w3orried about a single clutch .. my modern open kart is 39 hp and i run a cheap ol noram 11 tooth clutch with a bushing its been on there 2 yrs .. i have about 4" in the middle of my coupler thats 9/16ths thats where im gonna have my outside keyway on the 3/4 od part . more meat i was gonna key it all the way but i cant to thin .. so far its workin good and actually looks like i might no what im doing .. 
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| Posted: Sat Aug 11th, 2012 07:12 pm |
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13th Post |
Dennis Schmidt
Member
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On the the siamesed PP I mentioned the hardest part I was told was adjusting the chain because of the weight of the 2 engines. They were bolted together via a double side mount if you know what I mean which were in turn bolted to double floating axle mounts. I was told siamesing them really cut down on the vibration. Makes sense.
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| Posted: Sun Aug 12th, 2012 12:49 pm |
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14th Post |
Steve Miller
Member
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ok i did it ..!!! and it will work better .... i just have to buy a spider coupler .. it has me a little worried that its gonna break or where something out ..the kart has solid welded on mounts so there is a little worry about vibration .. my biggest problem is how hard it is to start .. i may have to switch heads on the motors and install compression releases . so far the only way i got a ride out of it was had one my friends pull one motor and i pulled the other .. also i think it sounds stupid ..i love the sound of duel engine karts but this thing sounds like a jet ski or somethin .. it just dont pop pop pop like a mismatched duel engine kart ..
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| Posted: Tue Aug 14th, 2012 11:55 am |
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15th Post |
Steve Miller
Member
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ok ., since i cant seem to get enough of this project ive come up with an idea that will work i think .!!! ive been making a jaw coupler thats actually the clutch nut for the motor with right hand threads and the other half slides over other motors crank ..!!! one clutch one chain .!!! no vibration Last edited on Tue Aug 14th, 2012 11:59 am by Steve Miller
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| Posted: Tue Aug 14th, 2012 02:30 pm |
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16th Post |
Dennis Schmidt
Member
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Bunch 3 of them together timed 120 degrees apart and it would sound even better...like a Saab formula junior.
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