Listen to this article now
Started on the lean-out valve setup. I had to do a bit of planning to figure out where I will mount it so it can be easily reached while strapped in. I finally decided that a position next to the floor pinch-weld would work and keep it out of my way. I will need to come up with a mounting for the valve, thinking a small piece of metal welded to it and then bolted down will suffice. I am going to use some Russell braided flex hose as that’s what I have on hand. Lean-out valves have to be -8 AN size as anything smaller doesn’t pass enough air to work very well. I decided to put a bulkhead fitting in the firewall both for safety and not wanting to pass the flex hose through a cut hole. On the engine side, it was a matter of figuring out where on the manifold to drill and tap a hole for the AN fitting. I decided on the driver’s side of the carb mounting and will run a 90* fitting with the hose going back towards the firewall.
My next piece of work is going to be a home made primer system. If you’re not familiar with running Methanol, it can be a real dog to get fired up when the engine is cold and when the air temperature is below 50*, it’s even worse. So after years of beating on starter drives, catching carbs on fire from time to time and sucking a gallon or two of alky trying to get some heat in the engine, I am finally surrendering and going the easy route. I have no idea of why I have waited so long to do so.
I found a one litre fuel tank that will bolt in nicely on the support frame for the glass frontend and I will be using -4 stainless braided line to run to another AN fitting under the carburetor. Different setups use various pieces to spray the fuel into manifold but I want to keep it as simple as possible. Right now I am looking at putting a gas carburetor jet inside a AN -4 fitting to act as a spray nozzle. Not sure if that will work but I need something to “spray” the fuel and not just dump it under the carburetor. Behind that will be a one way valve and then the hose line will connect to the output side of a simple 12v generator fuel pump. The inlet side of the pump will of course be connected to the fuel tank. The pump will be operated from a momentary switch that is already part of our switch panel in the car. I believe the jetted fitting will do the job of “spraying” the fuel into the manifold. The operating sequence for this is simple. When I am ready to fire the engine, I will hold the momentary switch for 2-3 seconds to put regular gas in the manifold, spin the engine over and then turn on the ignition. Even on the colder days, the engine should fire up even if it takes a couple of attempts, far easier than the old routine.