Ever since the car was converted to DCOEs I've had a intermittent buzz in the pedal when my foot is off the gas and on the brake. Right now, the carbs are soft mounted, and the pedal linkage is a single piece of bent hex stock, fabricated by Ronin Auto, the connects the linkage to the pedal. I suspect the hard mounted nature of the hex stock is what's causing the buzz to be transferred to the pedal. The gas pedal itself is new and the floor nubs are in good shape, so there's no play at the pedal/floor connection.
I have access to a resin based 3D printer in my office, and I was thinking of printing a spacer that would close the gap between the pedal arm and the pedal slide, shown in red below. Or, I could find an additional bushing that's larger than the one that is currently on the pedal linkage. I'm a little worried about reducing the amount of play between the two elements and causing the pedal to bind.
Seems like there might be an easier fix. I've read in another thread that adjusting the idle can eliminate the sympathetic vibration in the pedal, but the buzz only occurs at decel. Maybe a rubber bushing between the pedal box linkage and the hex bar connection to isolate the buzz?
The car runs great, and I haven't had any issues with the carbs coming out of synch, so I'd rather try and keep my carb linkage setup as is, and just fix the buzz. Open to ideas!