I fitted Mulfab 4-leaf 2 seater a couple of weeks back. I was also interested in the 4 seaters but they steered me away from these. Anybody interested it’s worth discussing first. However I am really pleased with the results and the ride is fine. My rear is over an inch higher now (now lowering blocks fitted) and the spring rate is so much firmer. With the old springs my rear tyres would occasionally kiss the underside of the rear wings, no chance now.
Not a difficult job just but quite physical. I don’t think “ease of maintenance” was high on the a gender when these cars were designed! Anybody who is thinking of changing, a couple of points to be aware of that I discovered on my model.
The springs need to be released from the front and withdrawn with the rear shackle assembly attached as the rear eye bolt cannot be removed in situe. The springs have to then be slid 50% of the way into the cockpit and the shackle assembly removed from underneath before the springs can be slid all the way out through the cockpit (the small rectangular cut out in the plywood behind the seats is the restriction). Alternatively you could jacked the car quite high and then you would be able to extract the springs in one hit by first sliding them 50% of the way into the cockpit, dropping them and then sliding back out from underneath.
Because the 4 leaf springs are thinner than the 5 the panhard rod sits is in a slightly higher position. Unfortunately mine interfered with the diff cover when the car was supported on the rear cross member. Not obvious and could easily be overlooked if the car was jacked via the axle or sat on the ground. My fix is a longer bolt and spacer fitted on the spring clamp to lower the panhard rod a little.
Well worth doing and I hadn’t realised quite how much the old springs had degraded.
