was wondering if there is a website where i could go and find out how to groove tires
thanks jim

I am no expert but I used the theory that the grooving should be close to 90* to whatever direction you are using it for.That is the place to cut sharp grooves is facing head on to the direction of traction.
Each tire is different. Some are combinations, because with the outside tires one turns and stops(front),one fights turn(rear) and accelerates so some grooves at 45* and some at close to 90*(same tire even) to direction of travel to accelerate. Put the grooves in the angle you will be asking for traction. I think the rest is personal interpitation of the racing surface and the angles you will be putting your car at when trying to get traction.. Think of it as a ladder and you need to angle the rungs to match the angle of the ladder so they are always 90* so you can walk on them. That is max traction. The rest is art work..............

I groove tires alot, it is cheaper than buying new ones. Most people don't believe in it or just don't want to take the time to do it.

http://www.americanraceronline.com/racing-.../tire-prep.html

https://www.hoosiertire.com/otdtire.htm (Click on FAQ on the menu on the left side then click on Question 6)

Good information, it seems like Hoosier and American Racer have different opinions on siping and what it does. Which is interesting.

We run siped bald tires in the feature if it is black and slick. That's about the only thing I will tell you.

I'll throw my 2 cents worth..

It should be noted that the pictures Steve posted can be run on either front or rear of the car. If you need pure forward bite on a super slick track then I would make the grooves true 90* angle blocks perpendicular to the sidewall of the tire.
Of course once this is done the tire in question cannot be run on the front.