Now the solid Carb mounts can stress the support rod.......................I was at a loose end yesterday and I used up some time making this. GTAR suggested it. I cut the center out of the support and welded in a pair of 3/8-16 nuts.
If I adjust it right they will share the stress and increase the safety margin (against whatever bad thing might happen?)Now the solid Carb mounts can stress the support rod.......................
A couple of people (not Richard) recommended keeping it.Do you need a support rod with the solid mounts?
Do you need a support rod with the solid mounts?
A couple of people (not Richard) recommended keeping it.
I will do that.Ed, give me the exact ID of the rod`s tube for the bush and I`ll make you one. I have the motor mounts to get width. Hole is 10mm but the width should be a close fit so the bolt locks the part in place.
Enginnering solution?An extra consideration is this; The airbox hits the underside of the hood when the engine shakes. I have a piece of rubber glued to the hood in that place to stop it rattling. There must be some stress directed at the Webers when this happens. That is a reason why I think that I may need the support rod.
I agree, this is fun and interesting. I am an engineer but far from an expert in vibration analysis so my comments are more seat-of-the pants than equations. I do have a fair amount of work experience manufacturing rubber mounts and such which I value far more than my degree. My argument regarding soft mounts verses hard mounts is that using rubber to attenuate vibrations is like juggling cats. There is little chance for success.This is fun! For the rubber mounts, yes, the support IS necessary. As I learned years ago, and some Lotus owners (the honest ones) will attest, there IS a vibration element in solid Weber mounts. This had 4 cylinder Lotus engines running complex emulsion tubes in the 40 mm Webers. I do not remember who told me that the Weber side engine mount is located near dead "vibration node" in the 4 cylinder Alfa crank and attaching either a solid or bushed rod from there to the outboard side of the Webers reduces high frequency Weber vibration that requires trick (Lotus type) E tubes. Ok maybe or maybe not. However, this is real. Float paddles can wear quite quickly without a support rod. Below is the needle-seat paddle from a new float I replaced for a customer after one track session with solid Weber mounts and no support rod.
Do you think that my adjustable support rod with a solid bushing is a "correct" installation with solid adapters?Below is the needle-seat paddle from a new float I replaced for a customer after one track session with solid Weber mounts and no support rod.