[24] TechnoChicken's "Dave the Democrat"

RichieRichOverdrive wrote:

Not really surprised at all that a 3” pulley gets hot. I’d try more belt tension. Friction from the belt will usually make more heat than what the engine transfers to it through the crank. Most of your clutching slippage should be at the engine pulley, if the belt is moving then the trans pulley should be moving. Only time the belt should slip at the trans is when you’re rolling in gear with the clutch pushed in, so the trans pulley should stay fairly cool. I was just looking at this yesterday on the lawn ranger, the engine pulley was pretty hot but the trans pulley was just warm.

Will do, either I need a better spring, or the clutch is bottoming out I will try to look at that this afternoon.
Not sure if this is normal with these trannys but this one (633a?) gets pretty warm after you drive it for 10 minutes or so at high speed.

Other thing for guys that run these unsynchronized transaxles, I have to whip this thing pretty hard to get it to shift, any tips on shifting these? You double clutch? let off the throttle before shifting? Hold er to the floor through the shift?

The 1-2 shift on a 633 is pretty much impossible imo, the 2-3 is manageable. You gotta find the sweet spot in the revs to do it and be pretty quick to avoid a lot of grinding. You’re pretty much gonna have some no matter what you do. If your belt doesn’t stop when you push the clutch in that makes it sort of unpredictable as to where the easy shift zone is, I do know that much.

Shifting depends like Rich said belt speed and catching it right.

With that 3 inch trans and 7 inch engine, your shifting will be pretty hard. Maybe even from full stop. Stock sizes, I can shift my ST between 1-3 pretty well most of the time. Marshal is a 2-3 only shift due to the faster belt speed due to pulley swap. Only trans that is harder to shift for me on the fly is a 2300.

MightyRaze wrote:

Shifting depends like Rich said belt speed and catching it right.

With that 3 inch trans and 7 inch engine, your shifting will be pretty hard.  Maybe even from full stop.  Stock sizes, I can shift my ST between 1-3 pretty well most of the time.  Marshal is a 2-3 only shift due to the faster belt speed due to pulley swap.  Only trans that is harder to shift for me on the fly is a 2300.

Not a huge deal but the front is 9", really aggressive I know.

Sounds like I don't have it too bad, the 1-2 is def. harder then the 2-3 but the 2-1 downshift I can get perfectly synchronized 90% of the time making for a really easy shift. First time I downshifted like that I thought it didn't go into gear because it was so smooth compared to the 1-2 upshift. I've found if you keep it to the floor during the shift and whip it between gears it usually shifts OK.
3rd high on this is almost useless due to the crazy pulley swap, it's really only useful on the road and takes a really long time to get up to speed, I wouldn't recommend anyone else does more then 9-4, I'm limited by the torque this 420 chinese engine can put out at this point. (And the belt lol)