I want the water/meth setup on my 88 626GT to be activated with a steering wheel switch or a shift knob switch, it adds 10psi boost using a factory turbo solenoid and it's useless in 1st and 2nd. Because the steering wheel button would need to be set up like the horn I decided the shift knob was much easier.
Is it me or does google and other search engines suck lately, less and less results despite the fact more and more people are connected.
Been searching and searching for a shift knob with a 12V single button latching switch, push once=on push again=off. Found a couple pictures that led nowhere and a pilot brand shift knob that is no longer available, everything else is a momentary switch, I could swap the button but the design is either round or for automatics (back and forth) but impracticable side to side.
Looked for shift knobs I could add a switch to (this would be easy) if I could find a shift knob with the right shape, I don't want one that you reach down and hit the button.
I looked for 12v single push button latching on off switch with LED and without, 99.9% are 16mm and up in stem diameter, I found two 12mm, one is from the UK but they have north American distributors but the switch is new and not available here, the other is on ebay, from china and ends in 24hours.
To see if it was even worth buying a switch I decided to see if it would fit one in a shift knob, so I cut a cube out of a piece of oak firewood and carved it out free hand to what I wanted, I was thinking a similar shape to the auto shifter, at a slight angle and molded to the hand but not to bulky. This would leave only one way to grab it and reduce chances of hitting the button accidentally.
So it looks stupid but is exactly what I wanted (a bit more sanding is required):
The dark flat area will be where the hole fore the switch will get drilled and threaded.
(Holding it a bit off angle trying to take the picture, Tore my fingers up when sawing through the split log in a vice, when I got all the way through my fingers hit the wood, the hard wood).
The next steps:
-Pilot the hole for the switch and wires, will thread the hole when I receive the switch and know the thread pitch (assuming M12 x 1mm or finer thread) .
-Take a factory shift rod (one swapped for a pace setter short shift) add some length to the bottom to increase the throw below the ball (shorten the travel of the rod above the ball) and add some length to the upper part also (if needed) to get the shift knob in the right position.
-Thread a metal sleeve to M10X 1.25mm, drill out the shift knob to that sleeves outer diameter (use the hole to pass a piece of string through the wiring holes) and Epoxy or PL premium polyurethane construction adhesive the sleeve into the shift knob so it sits in the right position when tight on the shit rod.
-Bevel the bottom of the shift knob and cut a groove around it to hold the boot in place.
-Paint the shift knob in a durable wood protecting paint, probably black.
-Pass the wires and install the switch.
-Install the shift rod and shift knob on the car and wire the switch to the Water Meth relay.
More pics to come.