ARP main studs question (for my 489 build)

[Blazer79]

Hey guys!

I'm finally building my 489 stroker for my Blazer.

So I got new ARP main studs for it. During the machining process, I got the mains align honed. Then the caps were ground down to get the right clearance for the crankshaft. The thing is that they had to replace and retorque the caps about 5-6 times during the process. I still have to do the final assembly after cleaning it, so that's one more torque down for the studs. I've read somewhere that ARP bolts stretch permanently and shouldn't be used more than 5 times. Can I still use these studs? Or am I risking something getting damaged in the long run due to an incorrect torque reading?

Thanks!

PD: I'll post my build pics soon.

 

[folkenheath]

You'll be fine. That rule only applies to "torque to yield" fasteners. ARP doesn't usually use that type.

FYI, one indicator of a torque to yield fastener is if you have to use a "torque angle meter" after the initial torque, for instance, torque it to 30 ft-lb, plus 90 degrees. This may not be true 100% of the time, but most of the time.

And you'll like the 489, 8.0 liters baby! Any more details?

 

[Blazer79]

Thanks Folkenheath! I was afraid I'd had to buy another set. So I assume ARP rod bolts are not affected by many test assemblies either. Are they?

Well my 489 is a Scat rotating assembly with cast crank, forged pistons and the longer 6.385 rods. I was able to get the the highly respected 049 heads and put larger 2.19/1.88 valves. Cam is a 206/214 @0.050 with 0.454" lift. According to desktop dyno, I'm gonna have about 600ft/lbs and about 350hp