after a few phone calls. Jay at ARP was VERY helpfull in tracking down an off the self part#/bolt to replace the stock stretch to yeild rod bolts used with the GM LS7 Ti rods. Its part#3AI1.600-2CU. It was designed for a 4 banger Renult <sp?> application. He said it will need to be shortened 4-5 thou to clear the inner rod. This is the best thing available for now untilthey set upmachining to complete a direct LS7 Ti rod bolt application. Katech is in the process too but no ETA ( could be ARP too or A1. Hope this helps all those retaining the stock Ti rods.

 

Good info to keep book marked for future reference.

PS: It's Renault.

 

very nice to know-

 

a quick follow up on my last post, Steve at R.E.D. has noted that there is proper internal clearance on the length for the ARP bolts for the LS7 Ti rods. The problem is that the collar is to large so some minor machining of the rod cap is required to gain proper clearance.

Here is an edit from Steve on this with pics....He surprises me at every corner with his meticulous attention to detail, wait till I post what he found with my custom 4.185 Katech piston & GM Ti rod assemblies....I'll save it for another post.

" First I checked the length of the bolts. The ARP bolt is very slightly longer. When threaded into the rod, there is more than enough thread depth in the rod to accommodate the slightly longer bolt. So the bolts do not need to be shortened. However, there is a really big problem here that ARP needs to be made aware of. The ARP bolts are .020" larger in diameter just under the head of the bolt. They also have a larger radius than the stock bolt. When screwed into the rod, I found the ARP bolt was riding on the under head fillet. The bolt head was not contacting the rod. I held the rods up to a light to check this fit at first then double checked by bluing the rod, torquing up to 30 ft/lbs then disassembling to see the contact pattern. Sure enough it was plain to see the bolt under head fillet riding on the edge of the bolt hole in the cap."

To ARP's defense they are working on an LS7 specific bolt right now. This was the closest thing they had and they said some machining would be needed..