92mph? My new Project, Racing mower! Craftsman / Jonsered LT12

truckin42 wrote:

Also what is your plan for the appozed twin Thunder?

Not sure, so stock for now.

That twin looks like new, awsome!

xxXMowerdudeXxx wrote:

That twin looks like new, awsome!

Thanks, and yea it does look fairly new, tho its 10years +++

I didnt get to do much today, I cut the rear frame to make the 820 fit snuggly "inside the frame", the black is a template for the actual gearbox mount.

how is the belt going to get there

motorizedeverything wrote:

how is the belt going to get there

i think he is planning on a jackshaft

richie thomas wrote:

motorizedeverything wrote:

how is the belt going to get there

i think he is planning on a jackshaft

Yup, CVT and chain.

Thunderdivine wrote:

richie thomas wrote:

motorizedeverything wrote:

how is the belt going to get there

i think he is planning on a jackshaft

Yup, CVT and chain.

sweet, im interested to see how it works turned like that

Finally decided on ride height, well gearbox placement.

and ran out of disc space when doing the video update.













And the waterjet got a bad bearing today, so its out of order - just my luck. Might have to rip out the plasma cutter

Very cool. Progress is coming along!

Looks good.
The 820 fit in there nicely.

New video edit, threw in some pictures of the 2nd Mock Up

I'm using everything I can from the stock steel and Craftsman mower. So I modified the dash frame today, made it Jack shaft ready.











Will be a tight fit, I'm taking my time on this a lot to make right, and the setup needs to be perfect.

does the chain hit the shiftier

I like the chain idea its better than a belt.
And it shouldt slip.

That's insane... I LOVE it! What are you planning to do to deal with the sag in the chain? You don't want the chain particularly tight, but the sag could cause you to throw the chain. Maybe some idler wheels for support at the midpoint? Perhaps a spring loaded tensioner to help take up the slop without it actually being too tight?

Doc Sprocket wrote:

That's insane... I LOVE it! What are you planning to do to deal with the sag in the chain? You don't want the chain particularly tight, but the sag could cause you to throw the chain. Maybe some idler wheels for support at the midpoint? Perhaps a spring loaded tensioner to help take up the slop without it actually being too tight?

Yea, will give the chain all the slop it needs with a proper guide/ tensioner. Will build this into the chain guard wich will also house the nut cracker, short shifter.

motorizedeverything wrote:

does the chain hit the shiftier

Yeah now, but nothing is bolted down, it will clear it, but the shifter axle will be cut down as well.

I dont like those Square fasteners anyways, ill just use a setscrew type to lock an axle spacer on it.

You may have already addressed this but, what about your clutch? Given what I see, can I safely assume you intend to use a torque converter and/or centrifugal clutch mechanism? Really curious about this now, as my front engine snapper is getting resurrected and further modified in a similar fashion...

A CVT self clutches. No other mechanism required.

prometheusEDI wrote:

You may have already addressed this but, what about your clutch? Given what I see, can I safely assume you intend to use a torque converter and/or centrifugal clutch mechanism? Really curious about this now, as my front engine snapper is getting resurrected and further modified in a similar fashion...

Ya a heavy duty CVT made for big ATVs and heavy golf carts, not to be compared to the 40 models etc.

A centrifugal clutch will never work, never seen one rated for 20hp + and those are really made as a momentary on-off switch, they burn easy. A CVT won't in the same manner. Tho heat is an issue also on a CVT.

Doc Sprocket wrote:

That's insane... I LOVE it! What are you planning to do to deal with the sag in the chain? You don't want the chain particularly tight, but the sag could cause you to throw the chain. Maybe some idler wheels for support at the midpoint? Perhaps a spring loaded tensioner to help take up the slop without it actually being too tight?

And thanks, and you probably know what tensioner im planning to use, like on dirt bikes, they have a chain holder and also keeps the tension.

Make no mistake about the Comet 40. They are very well built, durable, and can tolerate a ton of abuse. I beat the everloving spit out of mine for years with no issues.

Doc Sprocket wrote:

Make no mistake about the Comet 40. They are very well built, durable, and can tolerate a ton of abuse. I beat the everloving spit out of mine for years with no issues.

Yeah they are, mines a Comet 780.

Oh, I must have missed something. I thought you were getting one of those slick CVTech units outta Quebec... No?

Doc Sprocket wrote:

Oh, I must have missed something. I thought you were getting one of those slick CVTech units outta Quebec... No?

Ya ordered one from UK, then went ages waiting for it. Then the seller told me he was out of stock and wanted to sell me a model 40. And never found any nee supplier for the CVTech, so ordered the Comet 780 from MFG instead. But if this works as planned I might, try again on a CVTech unit.

The CVTech units are pretty bad@ss, but pricey as heck. I know the formula SAE guys use them and swear by them. I'd live one, but I think my wife would end up wearing my manly bits as earrings if I spent that much on a transmission.