Min weight help

[Tom Moock]

13.5 x 232 =3132 + 170 = 3302 round down to 3300.

[Everett Vassar]

On Dwights tool,above the classes the car can run in,it says power/weight factor: 13.44 what is this used for?

[Larry Hill]

Shipping weight / NHRA hp = natural class

[Dwight Southerland]

Originally Posted by Everett Vassar

On Dwights tool,above the classes the car can run in,it says power/weight factor: 13.44 what is this used for?

That is the natural classification power to weight factor you get when you divide the shipping weight by the NHRA power factor. That's what Larry was telling you. (Shipping weight is 3117, power factor is 232.) That number fits between 13.00 and 13.49 on NHRA's classification scale so it is a "natural" K car. Rules state that you can remove weight to the lightest possible weight for that class, so the minimum racing weight for K will be 13.00 x 232 = 3016 lbs + 170 driver allowance = 3186 lbs.

Rules also state that you can move one class down or one class up, so the other calculations from the tool show the minimum racing weights for J and L, calculated be multiplying the minimum power to weight factors for each of those classes by the power factor for the engine.

The 13.44 factor determines the classification to start the calculations. It is the numbers found on the spreadsheets that NHRA uses for that car-engine combination and is the starting point their people use to do their calculations. My tools does all that for you.

[Billy Nees]

And just another "Thank You" for doing all of the work in getting this site up! It's much (much) easier than the NHRA site. All of the work is done.

[Everett Vassar]

Thanks Dwight and everyone else for clarifying. We are over the min now just want to make sure I don't do something stupid

[Bob Mulry]

Originally Posted by Tom Moock

13.5 x 232 =3132 + 170 = 3302 round down to 3300.

and I would suggest rounding up to 3305 + 10 and not rounding down which would make you light at the scales