Lesson "1" How to learn from a video.
Here is the video. You want to make note of the clock and the mph.
http://www.youtube.com/watch?v=LHsrilzxVBMThere is a lot you can learn from this video eventhough it is not a T boat. The video has both clock and GPS MPH readings.
Record the speed entering the corner.
The speed thru the corner
The time to go thru the corner.
The exit speed out of the corner.
The number of seconds it takes for the boat to get to it's top speed.
Oval racing is all about acceleration. That boat exits the corner
in the hi 30 to low 40 MPH range and is accelerating down the complete straight to almost the next corner.
THAT IS WHAT YOU WANT YOUR T BOAT TO DO!
It is like driving a 4 speed car in third gear. This boat is in third gear. It will react much faster to changes in the throttle compared to being in 4th gear.
Now relate the 3 gear and 4th gear to your prop selection.
Say 4th is 24 pitch. YES you will have more top speed, but it will be lazy and slow to get there... Eventhough your recorded top speed is higher at the end of the straight. THE ACTUAL TIME YOU TOOK TO COVER THE STRAIGHT IS LONGER! That explains why a boat with a lower top speed stays ahead of a boat capable of a higher top speed.
So 3th gear would be 21 to 22 pitch. Much more punch out of the turn and it spools up faster....GOOD T boat example is Todd's number 13 boat. On a longer straight oval Todd would increase the pitch to gain more top end and give up a little of the acceleration out of the turn. The key is to continually gain speed on the straights. It is a DRAG race. It is about ET not MPH. Just like a drag car race. The winning car is the one with the lower ET and it may not have the higher MPH.
Last point is let the motor over rev at the end of the straight. As long the the boat is still gaining speed. Just let it rev. You will not hurt it.