Harrop 2300 supercharger to Optimiser 6500

[PeeBee]

OK, went out today to put some more miles on the build before the Madigan trip, and encountered what appears to be a repeated issue with the rear wheels on the GQ and GU, especially with alloy wheels.

I entered a round about at 50khr and the drivers side rear just decided to leave the chat, no warning, just fell off. I managed to pull the car mostly off the road but not before destroying a brand new disk from the Willwood Brake upgrade. Rang @MB for some assistance and he dropped everything and came across, but in the end the solution was to replace the studs and get it back on the road to see if it needed a flatbed trip or could drive home. Luckily it all came apart and went back together and drives fine, even with the flat edge on the disk. I rang Castlemaine Rod Shop ad was able to buy just a single disk which I will have monday. Could have been a lot worse, mangled the new tray guard but didnt affect the capliper which would be a pricey item.

So, were the nuts tight or too tight and over stressed the studs, was the damage to the studs done when the new studs were added to the new disks, who knows. What I can say with some certainty is the nuts dont look like they were loose as I have seen this before and typically the rim holes get elongated and mangled - the rim stud holes are perfectly untouched. Also all studs exploded at the same time, and I picked them up from the roundabout all within a 3 m circle. I did however do a complete check of the pass side nuts and 3 were not tight, but they were still firm.

Right now the jury is out. I did have the rear wheels off recently when playing with the springs and airbgs, so maybe they were nt tightened correctly or they were buggered from over tensioning and just waiting to fail. One thing is for sure, no more rattle guns, just torque wrench and I think perhaps locktite on the thread as well, although the failure point on all 6 studs is identical, right at the start of the threaded portion of the stud, identical.Lost wheel 4.jpgLost wheel 5.jpgLost wheel 3.jpgLost wheel 2.jpgLost wheel 1.jpg


SO CHECK YA NUTS.