anyone know what the dimentions and tread size of these bolts are?

 

 

cheers

:)

Yeah, where from? :-)

 

My Uncle just said that worldwide, the standard is to stamp on the top of any bolt if it's HT, the grade, and my flywheel bolts have no stamp on, which to him says they aren't anything 'that' special, which is a bit weird, and he really does know his onions, he part built that 10 mile long particle accelerator thingy in sweden, but i bet it wasn't as hard as re-buildin a Zed tho, haha... His opinion was that 8.8's would be fine, taking into account the power of the car, number of bolts and the length and surface area of the bolt head. A simple 'yes' would've been ok...

 

Anyways, it's on hold for a mo, see if anyone comes up with a source for em on here, can't imagine 8 HT bolts shearing off when ya put ya foot down, wouldn't really want to find out tho...

Ive a relation thats a chartered engineer and he put the ship lap on his shed upside down!! 8.8 bolts have very little shear strength which is necessary on a zed flywheel due to the torque.Thats why they are 12.9 grade.

can't imagine 8 HT bolts shearing off when ya put ya foot down, wouldn't really want to find out tho...

Wouldn't be too nice if the flywheel popped into to say hello to your feet. There is a lot of energy in a flywheel and crank spinning at 7000 rpm and if you were to dump the clutch .........

8.8 bolts have very little shear strength which is necessary on a zed flywheel due to the torque

I'd have to agree. Certainly don't use S/Steel .... might as well use bits of frozen buter