I have only today, finally got everything up and running. When I was advised to go with the bolt I had the same reservation however was informed that without it the movement would be too excessive. I’d say that was good advice given I wouldn't like to see any more movement than I have currently, using the drilled buffer feet and bolt. When I checked out how much vibration was leaking through to the lower part of the rig it was minimal. Not completely gone but almost unnoticeable. This may also be due, in part, to the fact that both transducers are attached to the fibreglass seat which will certainly contain much of the energy and that was evident when I felt the seat brackets which vibrated less than I would have expected.I've used a lot of these types bobbins and buffers on my rig (have a bag full of all different sizes lol)
Wouldn't drilling through that and putting the solid bolt between your connection points negate any isolation effect?
I’m looking to acquire the RaceBass vibration isolators and have emailed Simtag, so well see.
EDIT: Just to add, when I rocked the seat side to side there was significant movement which I wasn’t expecting. Not an issue because it doesn’t happen while driving. You’d expect the same amount of movement forward and back but this isn’t the case due to the flex within the seat itself absorbing the ability of the buffers to create unwanted flex. At no stage did I notice any difference while braking than had I had the seat bolted directly to the aluminium profle.
The bumpers I use on the brake pedal are rated at 210 pounds (95 kg) so that is a lot of force pushing backward on this particular rig.
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