Sub K Bolts

[Guest Brokey12]

Hi would it be best to use all 8.8 grade bolts when putting my kit together or do some bolts have to be a higher grade for iva ?

[Guest mower man]

8.8's are good but for suspension I personaly would use 10 '2 grade my opinion only others will differ ,one big thing is to use bolts and set screws in the correct places i.e. set screws are not good running through bushes mowerman

[David S]

I would go for the higher grade when joining the prop to the diff bolts but other than that 8.8 would be ok. Again, my opinion only

[Guest Brokey12]

Thanks for the replys , would I fail iva for using 8.8 on suspension components or no ?

[Snapperpaul]

Probably not but would you want to drive at 100mph with substandard bolts?

 

[knights_templar]

8.8 are fine for IVA. no lower though

 

http://www.marylandm.../tech/u19e2.htm

http://www.translato...(short)/inch²/

 

just over 58 ton, should hold most things

Edited August 31, 2014 by knights_templar

[Guest Brokey12]

I'd rather not drive a sub k at 100mph might be interesting lol , hopefully 58 ton should be plenty for a minute

[Grim]

I wouldn't use anything higher than an 8.8 grade where corrosion is a risk. The hydrogen given off by corrosion can embrittle higher strength bolts and cause failure. Given how rusty my hub pinch bolt and lower shock bolt were after 5 years on my car, i'd not risk it.

[PaulF2B]

Also make sure your bolts are all marked up as 8.8, 10.9 etc as they did check these at my IVA pass in July this year.

 

If you have any imperial bolts, I had some 7/16 UNF that came with the harnesses these have different markings with various radial lines corresponding to the different lbs/in2 ratings, make sure you take a chart / document from the supplier with you to prove the bolt strength.

 

One other thing to ensure if you buy through Ebay or online; is that the bolts are actually be marked on the heads, I bought some 8.8 bolts on Ebay as 8.8 rating but did not have the markings so will be no good for IVA to bolt on anything "significant".

 

I used 8.8 on the front suspension of my SubK, but 10.9 on the prop and the long dif' mount bolts.

[Guest Brokey12]

Mine are all stamped 8.8 , I was going to use original sierra bolts but would look a mess as everything else has been blasted and painted . Also I'm thinking of altering the rear end of my chassie were it slopes down from the roll bars , would I be allowed to do that or is that not allowed ?