This is not the cheapest but it is one of the best. I have one that me and all my buddies use. It works very well: http://www.carbtune.com/
You can get a mercury stick for $40-$50. You will also need to rig an auxillary fuel tank. I made one by treading a nipple into the cap of a one gallon Blitz plastic gas can.
You can get a mercury stick for $40-$50. You will also need to rig an auxillary fuel tank. I made one by treading a nipple into the cap of a one gallon Blitz plastic gas can.