Quote Originally Posted by hog View Post
A simple visual is a simple tabletop fan, the smaller the fan, the less fluid, in this case air the fan can move.

You can make a 298mm TC stall at 2800rpm, and you can make a 258mm stall the same rpm, but one of the diameters will be more efficient than the other. This is why people use smaller diameters for the higher stalls, and larger diameters for lower rpm stall. There comes a point when trying to make a 298mm TC stall at higher rpm, that the movement of fluid becomes very inefficient.
Think the wrong pitch of prop for a boat.
To much prop and the engine lugs down, to much and the prop will cavitate.

I know that Precision Industries likes to use a 9.5" TC for their Vigilante car applications, and their 10.5" diameter for their Vigilante truck applications.

The smaller the TC the more apt. it will be to have a higher stall rpm all else equal.

peace
Hog
Makes sense... thanks for the explanation.


I know this 2800 stall is going to eat my shifts... So I guess ill be re-tuning my tranny perimeters to harden those shifts back up lol.

Really looking forward to it.