Quote:
Originally Posted by fooddude
That wouldn't really be 100% if you only counted yourself against other crashbolt users. If you only counted yourself, it would def be 100%..but that would be a moot statistic.
You mean 1(as in yourself with this problem)/x-users, no?
x = the rest of the frs/brz users using oem crash bolts on slotted/oversized holes. ie: if there were 500 using the oem crash bolts and 1 reported slippage problem so far, it would actually be 1/500 = 0.2% failure rate.. or, until more people claim they are having the same problem.
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I'm counting myself against other crashbolt in slotted hole users who have followed their service manual and coilover installation instructions. A statistic is valid when everything is standardized and variables eliminated. How many others have reported success using the same standard methods that we can validly include? That's where I got my 1/1 stat from. It's no longer a direct comparison when you throw in owners using non-standard installation values/hardware. One guy is fine with an aftermarket bolt (though if you look it up SPC explicitly states not to use their bolts in slotted holes). 129 ft-lbs is standard for the Impreza's bolt but not for the BRZ. Maybe the BRZ's lower 114 ft-lbs torque value has to do with the strut or hub knuckle or a material change in the bolt or nut or something else.
Could be other things in play. Suspensions that see hundreds of miles on track or autocross won't undergo as many abrupt shocks as on terrible SoCal roads (where I live). Their suspension may see hard forces applied gradually rather than frequent traumatic jolts that jar bolts loose (think impact wrench).