Clutches for Clutchless Transmissions

[Jack Gifford]

I'm probably missing the point here. A "clutchless" transmission is perfectly happy being used as a "clutched" transmission. Why not simply use a foot-operated clutch?

[Sumner]

I'm probably missing the point here. A "clutchless" transmission is perfectly happy being used as a "clutched" transmission. Why not simply use a foot-operated clutch?

I'm wondering if the concern is past the transmission and is the rear-end?

Sumner

[Ron Gibson]

 Shift slower=no shock.

Ron

[Seldom Seen Slim]

Ask Al Teague and Carl Pace for pointers on slow shifts.

[rouse]

It was a specials experience to listen to Al Teague's runs at Bonneville. Especially one early in the morning when everything else was quiet and all you could hear was the uninterrupted sound of his run. You'd think he was in high gear as the sound of the car pulling would go on for ever, and then you'd hear him shift gears again. WOW

Rouse

[Seldom Seen Slim]

It was interesting watching the Phoenix run - from the pits, for instance.  You'd see the black smoke in a long straight line then nothing for a few hundred yards (as he shifted) then the smoke would make that line again for a mile or so, then another blank space. . .

Special stuff to remember.

[manta22]

It was interesting watching the Phoenix run - from the pits, for instance.  You'd see the black smoke in a long straight line then nothing for a few hundred yards (as he shifted) then the smoke would make that line again for a mile or so, then another blank space. . .

Special stuff to remember.

Amen to that, Jon.

Regards, Neil  Tucson, AZ

[SPARKY]

Guys you are all right-all of those ideas would work

--We are just trying to get away for everything you all have mentioned  The shock loads the conventional clutch and the long pauses.

We are trying to treat it as a 4 mile drag race with a on mile trap or a 1.3 mile drag race in the case of El Mirage.  To run on hard records above 220 at El M or 315 at B'ville we will need every possible second of time to accelerate with limited traction and we are going to have to dramatically narrow our operating range with closer gear splits

[Paolo Castellano]

Hey I'm just throwing something up against the wall here Sparky, so don't laugh before you think about it.

The motorcycle folks use an ignition kill for just a few Milli seconds to shift. If you set something like that up on your shifter, that should soften the hit. Simple to do and shouldn't cost to much. All providing your engine combination will stand such a thing.

Rouse 

This is what I was thinking.

Just cut the ignition and ramp in the power accordingly after the shift to soften the hit of the shift and keep the rear tires loaded for minimal slippage.

[SPARKY]

Back to Eddie's CS post we are working to deal with the INERTIAL shock loads cased by the RMP differences these are loads not dependent up on Power to Break stuff but rotating mass that must be brought to the same speeds-- the ing. blip could help

but if we can control the clutch as it moves from full clamp, to partial clamp then  returning to full clamp we should have a more controllable journey.