Rear Monoball mounts are now completed with a plate to adapt Ohlins R/T coilovers for installation with the monoball mounts. As seen in the pictures below, the Ohlins set comes with a mold formed rubber insert that fits into the OEM strut mount and locates on the three OEM strut mount stud heads. A machined aluminum part then fits into the bottom side of the rubber insert in the Ohlins kit. The machined part has a lip with an OD that mates with the spring.
The Ohlins rubber piece is so large and has such a radius that making a monoball mount that would still fit properly in the car body and have sufficient wall thickness was not possible so I designed and built a different aluminum insert that would locate on the stud heads, be flush with the bottom plate of the monoball mount, and have the correct lip/OD to mate with the Ohlins springs.
A rubber washer supplied by Ohlins sits between the aluminum lip and the spring. Inside the cup is a FK Com14t F1 fit spherical bearing captured by a cap with 5 M5 screws. Bearing retainer compound will be used for the bearing locating surfaces with Loctite blue on all screws/nuts.
Here you can see the monoball, adapter plate, and spring from the side view.
Here is the assembled monoball and coilover though I need to increase spring pre-load by 5mm. I couldn’t tighten the pre-load spanner nut any more by myself. Aluminum will be anodized blue.
I am done with machining other than building drop link adjustment centers after getting everything installed and measuring what length centers I need to build for front and rears. If all goes ok I hope to get the car on the ground again this week. The only issue with this is I can’t get tires I want and the ones I had are completely done. Stupid Covid shortages of everything…
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