strictlypersonal Bob you are an EXCELLENT ENGINEER and have the paper to go with this. The steady improvement on the ERA car speaks for itself. You know if the rear assembly is not setup with the correct wheel alignment, balance of wieght, a good posi rear, shocks that are too soft, tires that don't have the right pressures or a low rpm, drop the clutch can all cause wheel hop. ERA is not the only cobra company that has wheel hop issues, Watts linkage kit and link kits for the jag rear are being sold on Contemp's cobrafor they when out of business. Some of the other manufactors have added links to control the jag that is only bolted to the top 4 mounting bolts. Will a bearing last longer ( if greased ) in a pivot joint that a poly plastic bushing yes. I am running the white bushing that get grease every race and I see no play or deflection in the joints. You also have to note that doing burnouts is not easy on the drive train and the cobra with a jag rear was not designed for this. You engineered a cobra that is an all around car for doing it all, it also eliminates vibration to the driver and the car. The new graphite bushing coming out are harder than the white ones. How much deflection is there? which point is causing the hopping? It would have to be the outer pivot point on the lower control arm. You have a rod to keep the lower arm in place but the front on that rod has a rubber mount. Is it possible that this mount is compressing? Causing toe to change? Play in the stub shafts in the uprights, Doug at your shop set mine up for the right end play, is it possible that when the car gets up on the tire it pivots in or out and cause the same problem?
Sorry Bob, it is alot more than just those 2 mounting points causing all the problem. Rick L. Ps my car doesn't have wheel hop, it squats and leaves. I don't have my watts linkage on my car either.
