Text and pics on the modification of a Champion Fuel Injection Cleaner kit.
The Champion Fuel System Tune Up set was produced in the mid '90's and distributed
through Napa and other retail houses. It was an excellent set, with comprehensive,
well illustrated instructions. It used a pressurized 12oz can manufactured and
distributed by Champion, filled with a cleaning compound and light hydrocarbons
to run the engine on the can contents with the car's fuel pump disabled.
A vast array of adapters and fittings made this kit adaptable to virtually any F/I
vehicle.
Champion went out of business, and with no supply of flush cans, the kit was
rendered unusable.
Along comes 3M several years later. They create their own style of F/I cleaning 
equipment, have the exact same can manufactured but with their own propriatary
contents and thread on the nipple, thus making sure it could not be used with  the
Champion kit; deliberatly keeping the Champion kit obsolete.

I adapted the Champion flush valve to the 3M can by using an off the shelf 1/4NPT
adapter. I bored the adapter out to .500" on the large end. I then made 2 brass collars
With a .001 interference OD, threading one internally for the 7/16-20 threaded
can tap fitting, which was also the original can thread of the Champion can.
I threaded the other collar with the proprietary 26TPI thread form of the 3M can.
I bored the rear of the adapter to .415", to allow removing and adjusting the depth of
the can tap fitting from the rear. I pressed the can tap collar in, then the can thread
adapter collar. I soldered the can thread collar to be sure it would not rotate when
screwing it into the can. I drilled/tapped the adapter 12-24 for a set screw to lock the
can tap in place once the depth was determined. Didn't have a set screw handy,
so used a screw for now.

The pics:
fimod01: shows the Champion kit
fimod02: shows the kit opened to show contents
fimod03: shows the original Champion can, and the new 3M can side by side
fimod04: shows the different threads on the 2 cans
fimod05: shows the adapter on left, then the can tap, the can tap collar, and
the can thread adapter collar
fimod06: shows another view of the assembly
fimod08: shows the modified adapter installed on the Champion flush valve.

JR NORTH