Sorry to join in so late, .... have been doing some Vet event stuff for Memorial Day
and just now saw this thread.
I wanted a TT flatbed since finding one in a local barn when I was a kid. Model A's
will not cut it for me - too modern looking. I wanted a TT, no exceptions. Oh yeah,
and I wanted to make it go fast (for TT logic) !
I happen to live in Spokane - epicenter of the Model T world, because Antique Auto
Ranch happens to be here, and an evil plan to seed the hobby long ago has resulted
in a very large local following. The fact that the AAR is also ground zero for the Montana
500 is also a major factor here too. Anyway, I walked into the AAR after deciding to
get serious about owning one, and announced my intentions. The "deer in the headlights"
looks coming back had me thinking they had heard this line before from more than one
yahoo that never got off the ground. And no one took me seriously until I showed up with
my truck and asked more questions about performance and safety. It was only then that
speed secrets and T theory began to get explained to me. And the more I followed through,
the more they shared. And basically, it goes like this:
You only got 20hp, and steep gears to work with here. Tweaking all the various components
to advantage CAN make a TT go pretty fast. Is it wise to go that fast ? Probably not.
So, here's where I am at: a VERY well balanced engine/transmission is half the battle won.
Tightly dialed in coils is uber important, as will be acquiring some 5:1 ratio "express gears".
The balancing and express gears will allow the drivetrain to spin faster. Now to figure out
how to squeeze more power TO the drivetrain, to match the gears and desired speed. A
high-breathing carb is important. A SCAT crank is too. I added a Z-head to bump compression,
and can comfortably cruise on flat ground at 35-40, with a top speed around 50. I have a
Lincoln 3-speed (OD) transmission that has yet to be rebuilt/installed, but the math says
60-65 ought to be possible.
Now for the "down" side. Brakes. To my way of thinking, a T without wood wheels is like
eating steak through a straw. No wood wheels, why bother ? They are an intrinsic part of
character of a T, ESPECIALLY a TT. And even in brand new, rebuilt form, have serious mechanical
limitations to the inertias imposed upon them as speeds and braking needs go up. And options
tend to look like hell.
So, I resolve myself to a balance of wanting a longer range (more speed to cover more ground),
versus losing the character of the TT that drew me to them in the first place, AND an underlying
grasp of what is utter foolishness, regarding safety. Currently, I run no special brakes, but have
a set of aux. brakes at the ready, should I ever get around to installing the Lincoln - which is
another safety concern. Should I ever "miss a shift" and find myself unable to get the truck back
into gear, I am a freewheeling mess of no brakes at all until such time as I find a soft landing place
or a stationary object. Either of which will likely require the change to fresh skivies. No thanks !
So, the aux. brakes are pretty much mandatory, if a person ever adds the aux. transmission.
More questions ? Happy to answer them. Just ask away !