' Qwik Seat '
why it was invented
In the 60s i was building racing engines and the racing valve job is an important part of the engine package. The intake & exhaust valve lets the air in and out of the cylinder head and seals the combustion pressure in the head chamber. So you need to enlarge the valve seat size by grinding the seats to a larger diameter and keep the seat in from the outside egde of the valve .010 - .015 on the intake & .050 - .060 on the exhaust valves. At the time there was no tool to use to find out where you were grinding the valve seat to in size? So standing at the bench for hours at a time holding the heavy grinder i thought a lot about making a guage to let you know what you are doing with the grinder.
The first design had the large tube like you see in the photo with a thin vertical sheet metal wing coming off the tube that i sanded to a sharp point and it worked very well but if you dropped the tool while lifting it up off of the arbor it would slide down and the point would hit the valve seat and flatten out the point and i would have to resharpen the point and try to get it in the same place from the center of the valve stem out to  the outside of the seat that you are grinding and that just did not work very well. So design # 2 is the small tube that you see welded to the large  tube with a hardened tip and a ground point that works great and does not wear down. So to complete the seat grinding you grind the 45 dregree seat a little over size and take a magic marker and put 3 or 4 marks around the seat or all the way around like in the photo, set the pointer to a bit in on the seat 45 and use the topping stone of 15 degrees and grind the seat to the line you have scribed. Use a little lapping compound and lap the valve and see where the seat is on the valve and that will let you know of where to go for bigger or a bit smaller.to get the correct diameter for your valve size.After you grind the top cut that gives you the seat diameter then you reset the tool to grind the bottom seat angle of 55 - 60 degrees and that is how you get the seat width you want .020 - .025 on the intake and .050 - .060 on the exhaust valve. The more you grind the more narrow the seat gets so you can check it with calipers or a little compound and lap a valve to make sure it is what you wan't for the final size.With the Qwik Seat tool you save about 2/3 of the time it takes the grinding the seats the standard way and now your racing engine runs better because all the seats are in the same location in the head and on the valve so the more equal the cylinders are the more horsepower your engine put out and thats the name of the game , more power the more you win !!
Sincerely Don Nowell