TRUE LASER TRACK YOU CAN ALSO:
- Turn your front laser down and project your rear laser forward till it meets
the front laser dot and check to see where the tire contact patch is interlaid.
Where they intersect is your contact patch, whether its offset, if its straight
over or if its inbound, so you will know where that tire is at all times.
* Check Roll
- You can also check within thousandths of an inch what rear roll steer is. Now
the old style method was you took a plumb bob or string out to check it, well we
found out that this is not accurate. We did a chassis set up on two Winston
West cars. These two cars were built identical, as close as you can get them on
a scale. They had the same wheel rates, the same springs, the same front-end
geometry, and track width. Everything the same as they could get it. The only
thing we found was the control arm angle was a little bit different from one car
to the next. What would happen is one car would go into the corner, really
turning good, the other car was really tight in the middle of the corner; they
never could get the push out of it. When we checked the rear steer in the car
that was tight all the time, the rear tires projected
in or down, 20 thousandths.
The car that was really quick projected
out 20 thousandths. The old method of
checking using a plumb bob or a spring to check roll steer, you could never find
20 thousandths, with the TLT you can. The difference between using the TLT and
not using the TLT is 2 to 3 tenths of a second lap time.
* Check Rear
end for possible bent condition
- With the TLT you can bend the rear end back to the original specs in the race
car. Say you’re running on a Friday night, got hit in the left rear corner, did
you bend a tube?? The previous week you had already established what the
dimensions are from front to rear using the
True Laser Track*
. And you now know what your toe dimensions are
on the rear axle housing. Simple deal, Saturday morning in the shop you bolt
your TLT adaptors on the right rear and left rear, project your dot to the
front, then project your dot to the back and see what the difference is. Just
what you thought, a bent tube and it’s within a quarter of an inch. How are we
going to straighten it? Most times you would have to pull the rear end out, set
it up, rotate the rear end, see how much the wheel tracks in or out and correct
the toe of the bent rear axle. Right now with the
True Laser Track*
, you just leave the rear right in the race car , project your line forward.
Lets say it’s toe’d in a quarter of an inch which is 20 to 25 thousandths. On
the opposite side of the tube we would take a torch and heat up the tube about
silver dollar size, get it cherry red and then flush it with water. Watch the
laser dot come right back to where it should be. You just
SAVED TIME AND MONEY!!!
* Check Track
- Another thing you can do with the
True Laser Track*
is check the relationship between the rear end and the frame. You’ll want to
track the rear end parallel with the frame. You’ll take a 24” square and cut off
one end of it. Take that and lay it down, place it next to the frame. Take the
TLT laser, turn it on and project the dot down and get a reading. It’s 12 ˝
inches. Take the square and move to the front part of the frame, lay it in,
project the TLT laser forward, 12 ˝ inches. Now I know that the right rear is
perfectly parallel with the chassis. When the car propels forward you have the
best of both worlds. You’ve got the perfect track but you also have the body.
Even on a short track it helps to have an aerodynamics advantage.
- Also, you can check chassis movement. Slide a floor jack under each side of
the car; pull your rear springs and shocks off of it. Now set your car to ride
height and let your chassis go up and down, simulating what its doing as it goes
through the corner.
As you can see the True Laser
Track is a multiple purpose tool, that you can use to detect many problems.
You’ll either buy, and use the True Laser Track or you’ll be following someone
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