Re: Fitting a Carter 4070 pump
Posted: Tue Jan 26, 2016 7:18 pm
Simon -- You said "I do have sheet of rubber betwixt body and bracket " Just to be clear about the use of those rubber sheets: the rubber sheets don't do any good unless the fasteners connecting the bracket to the body are not themselves completely isolated by rubber. IOW if any metal object touches both the bracket and the body, the rubber sheets accomplish almost nothing, because the vibration is transmitted from the bracket, along the fastener and directly into the bodywork not matter how much rubber there is elsewhere.
The rubber isolators that come with the carter fuel pump are relatively stiff and thin grommets. You might consider replacing those with a softer mounting. In the US we have a wonderful industrial supply McMaster-Carr that has lots of these in different configurations. See:
http://www.mcmaster.com/#vibration-damping-sandwich-mounts
You would want to choose the ones with the lowest "Cap. per Mount" to get the softest rubber.
This is how the Facet Interrupter pumps were mounted.
The rubber isolators that come with the carter fuel pump are relatively stiff and thin grommets. You might consider replacing those with a softer mounting. In the US we have a wonderful industrial supply McMaster-Carr that has lots of these in different configurations. See:
http://www.mcmaster.com/#vibration-damping-sandwich-mounts
You would want to choose the ones with the lowest "Cap. per Mount" to get the softest rubber.
This is how the Facet Interrupter pumps were mounted.