MTFCA Forum

I was looking for any info on changing gear ratio on the low speed drum / triple gear I was told some one made a set of custom gears and drum a few years ago but can not find anything. Looking for a longer low speed so when you shift to high it won’t bog this would be for hill climb racing only.

Eric

you misunderstood or were miss-led. Dan McEachern can convert your triple gears from bushed gears to needle-bearing gears along with proper hardened pins for the flywheel, but the gearing is what it is. There is no better combination of 1st/2nd gear...all you can do is play with rear end gearing or put in a 3 speed Warford transmission with modern dog style gear engagement or a Ruckstell for a fast ratio change.

You might try a 10 tooth pinion(4-1) & wind her up.
If you are a serious hill climber, your motor would be hopped up to take higher rpm's

A friend & I were running down the freeway @ 55-60. I was following on a cycle. He claimed to have 4-1 gears.
His motor was warmed up a bit, but was still running a nh carb. FWIW.

I know what your saying but there was a few sets made I have seen two cars in person that have what I’m talking about and they can rev out low speed another 100+ feet than any of the other 30 cars we race against. And they still use standard 2 speed trans just different gearing in trans . The ruckstell actually makes them slower for what we are doing with them as well .

It referred to as a high low gear set up.
I run it in my hill climb/dirt track race car.
Draw back is there is no reverse. But I don’t need it.

It referred to as a high low gear set up.
...
Draw back is there is no reverse.

now, that I would believe...I guess I don't know why, but I had assumed he was looking to keep a fully functioning transmission

So how does or what goes into the high low gear setup ?

A lot of ca$h, I'd think. Wouldn't a Scat crank get you to about the same place? More revs on tap; more rotating mass.

Not as costly as one would think. But when you are trying to pinch another inch of performance, what’s a few more bucks.
Closing up the ratio between low and high keeps the engine in its power band on the shift to high.
Two parts are involved, a spacer and a driven gear.
I had extra sets made. If interested contact me but remember you will not have a reverse gear with this set up. Contact me via the forums messaging.

tman1913 wrote: ↑

Sun Oct 09, 2022 11:12 pm

Not as costly as one would think. But when you are trying to pinch another inch of performance, what’s a few more bucks.
Closing up the ratio between low and high keeps the engine in its power band on the shift to high.
Two parts are involved, a spacer and a driven gear.
I had extra sets made. If interested contact me but remember you will not have a reverse gear with this set up. Contact me via the forums messaging.

It would be neat to see a picture of these special modified pieces.

In my 22 Runabout the previous owner had used a 3:1 rear axle with a low head. He also installed a Ruckstell. I still use magneto and coils in it and NH carburetor. It goes quite fast on level and downhill and going up a 6% grade goes about 35 in Ford High. Anything slower than that going uphill I need Ruckstell. A couple problems: When I start out from a stop on even a slight grade, I need to stay in low or use Ruckstell because of the gear ratio, and on tours unless I am the first car, the others usually go up that 6% at about 25 and I must use Ruckstell if going that slow. So with a T what you add sometimes subtracts something else.
Norm

Spot on Norm. The other nasty with a 3:1 diff ratio is the seriously compromised standard braking. A much more driveable solution is a KC Warford. You keep the standard T siff ratio, gain an intermediate gear like a Ruckstell and then an overdrive like a 3:1 diff, all in a delightfully easy to use package.

Allan from down under.

Ericgj85 wrote: ↑

Sun Oct 09, 2022 9:14 pm

.. Looking for a longer low speed so when you shift to high it won’t bog this would be for hill climb racing only.

With a Ruckstell you can eliminate that low-high bog. Starting with the Ruckstell in high, as you release the low pedal, shift the Ruckstell to low. This gives you an intermediate "high". Then shift the Ruckstell to high. A foot throttle makes this work very well. I use this method when stopped at an intersection and the street ahead is uphill.

I'd like to have a T with one of the 1950s/60s type thin line Borg Warner overdrive unit adapted. It's a direct/OD planetary unit that was used on the back of regular 3 speed manual transmissions to give direct and .7 OD. The whole unit is only about 8" front to back. They have to be locked out to back up. All functions could be controlled manually. That would give you low/low-OD and high/high OD

Here is what Mike is referring to.

Thanks Dan M. for the pictures. Its simpler than I imagined.

I am not sure, but this arrangement might result in a reverse gear. I wonder what the gear ratio is

Art Mirtes