mechanical overrev, whos done it? what broke?

[MyBeatGSX]

So what are guys with built motors regularly turning 8,500k+ using for flywheels and flywheel hardware?

 

[sunflashx]

Id bet that cromemolly fly wheel bolts and some other stainless hradware form ARP would be a possiblility if enought interest was shown.

ARP Supra bolts work. They're a little bit longer and some people have reported having to tap their cranks a little deeper. I think I also remember seeing a guy break off a tap in his crank doing this, so be careful.

How the hell did you drill through the grade-11 flywheel bolts? I took my grade 11 turbo bolts to a machine shop (though not a very good one) and they broke two bits unsuccessfully trying to drill through them with a drill press. I really want to safety wire my turbo, flywheel, and a couple of other things but I haven't found a way to get holes through super-high-grade bolts.

Took it to a local machine shop and paid them like $50. I think they just charged me like 2 hours of labor or something.

 

[BISHILVR]

There are actually safety wire lockwasher tabs that you can place under the head of the bolt, and then run the safety wire through it. We use them in the motorcycle industry.

 

[compression]

Misshifted into 2nd from top of 3rd, hit 9867 rpms and was running on 3 cylinders so i thought i floated a valve, after all the cursing and kicked, i found a plug wire came off of the coil pack , plugged it back in and she ran like a champ

 

[ekanddsm]

Overrevved my Daily driven Mazda6 V6- 95+ mph went to downshift from 5th to 4th and got 2nd insted. Revved right off the Tach, 3inches past 8000 rpms but it kept running.
I have to say overrevving a engine puts way to much stress on the internals.

I would imagine it would distort a crankshaft if not balanced to turn that speed.
any opinions, Much like a tire only rated for 130, and someone goes way faster than that on it!