ARP2000 advice needed

[HadeS]

Hello.

 

I have bought a set of arp head bolts from one of the members from here (no box included).

 

Standard studs are m10 where those arp's are m12.

 

Is any one using any similar studs?

 

TBH. I can't see that they are made for 2JZ.

 

Any thoughts?

 

http://img855.imageshack.us/img855/9641/arp2000.jpg

 

http://img198.imageshack.us/img198/6205/arp2000x.jpg

[HadeS]

Any one?

 

I would like to know as it looks like I received not what I paid for.

 

Michael

[Hartmann]

i think it is ARP 1/2inch stud or 7m head stud´s eigther way they are not going to fit .if your not going to re-tap your block and do some machine work to your head.

[HadeS]

Right, I think I know what they are...

 

This is how they look like.

 

http://www.titanmotorsports.com/l19hekit1inf.html

 

I think I'll sell them and get the 10mm ones.

 

Cheers Hartmann.

[Chris Wilson]

ARP do a 12 mm stud kit as the Yanks believe the 10 mm studs can be stretched or pulled by sheer cylinder pressures. Probably more like detonation pressures, but hey.... If you want to use them you need to drill out and tap oversize the block's female threads. The Yanks obviously haven't band sawn a block into sections to look at the material present around the bolt holes before hitting on this "good idea" If you are going to do serious porting, or putting over sized thread holes in castings you need to be able to see the material section you are fiddling with. I have paid for several bandsaw blades at my engineering man's place over the years, but haven't (yet) ported into waterways or fresh air, or drilled holes in blocks leaving perilously little material left where it matters.