550hp Enigne Build

[rob82]

I recently developed an engine noise in my r32 GTR that sounded like either a shrunk skirt or a spun bearing. I opened the oil filter only to find speckles of copper which would say to me that I have spun a big end. The motor is still in the process of coming out and I have a few decisions to make as to what components to use as I've heard so much crap from different people. It seems engine builders will bag other products but when you ask why they cant really answer you. THe decisions I have to make are:

1. Pistons - CP or Wiesco seems to be the choice. What are the differences between the two aka - piston weights? silicon content? clearences? I think the wiesco's have a lesser compression height than the CP's, is this right? What rings to use? They will probably be 1mm oversize.

2. Head gasket - Cometic have a pretty good reputation? I'm looking at a static comp around 8.8 - 9 as bigger cams will be going in down the track and I want good response.

3. ARP stud kit? Is it necessary? I think the RB26 doesn't use convention head bolt theory so you must replace them? I will use arp rod bolts as well.

4. Main bearings? No idea what to use are the ACL any good?

Can you guys think of any thing else apart from the obvious I will need for a 500rwhp built motor?