Splayed 4 bolt tq#
Fastener torque is specific to the fastener. I don't know if ARP has multiple grades of bolt for that application but just incase I would look it up on their site or at least post the PN you are using here.
every splayed conversion ive done with studs they all went to 80ft/lbs with moly lube.....in reality you should be torquing it to whatever your machine shop did when they cut the mains......any more you can distort the housing.....arp used to want 100ft/lbs which is what i did on my inital build....upon dissasembly two years later to check it over i found the mains were oblonged a bit from excessive torque........conciquently arp lowered their rating to 80lbs just about when i saw this......i run 80
every splayed conversion ive done with studs they all went to 80ft/lbs with moly lube.....in reality you should be torquing it to whatever your machine shop did when they cut the mains......any more you can distort the housing.....arp used to want 100ft/lbs which is what i did on my inital build....upon dissasembly two years later to check it over i found the mains were oblonged a bit from excessive torque........conciquently arp lowered their rating to 80lbs just about when i saw this......i run 80
I wish I had the info but the machine shop that did my first build is no longer in business. I think I'm just gonna go with 77 on the bolts and 45 on the splayed with arp lube. Anyone think that's a bad idea? Or have another suggestion?
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I would also go with ARP's specified torque for the size/thread of the fastener. They rate their fasteners by how much they stretch, not how much they clamp. Purchase and use their Ultra Torque thread lube-it's better than any other thread lube on the market.
Your outer bolts are 3/8 inch??
Your outer bolts are 3/8 inch??
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Verdad Gallardo I think most of us understand that torquing a bolt is intended to stretch it some BUT at the same time the point quick95lt1 made was that there are other variables far as lube and what the block was machined at. I would also add that maybe a production block just distorts too much at 100ft. lbs. He also said ARP themselves lowered the suggested torque.
Far as the Ultra Torque thread lube I have heard some negatives about parts being damaged before torque was reached because it was so slick. Which brings us right back to trying to replicate whatever the machine shop did being the best bet
If 80 with moly was ARPs spec a couple years back when this was built before the Ultra Torque lube came out then that would be the best bet. If really worried could torque it and have the mains mic'd.
Far as the Ultra Torque thread lube I have heard some negatives about parts being damaged before torque was reached because it was so slick. Which brings us right back to trying to replicate whatever the machine shop did being the best bet
If 80 with moly was ARPs spec a couple years back when this was built before the Ultra Torque lube came out then that would be the best bet. If really worried could torque it and have the mains mic'd.
I think most of us understand that torquing a bolt is intended to stretch it some BUT at the same time the point quick95lt1 made was that there are other variables far as lube and what the block was machined at. I would also add that maybe a production block just distorts too much at 100ft. lbs. He also said ARP themselves lowered the suggested torque.
Far as the Ultra Torque thread lube I have heard some negatives about parts being damaged before torque was reached because it was so slick. Which brings us right back to trying to replicate whatever the machine shop did being the best bet
If 80 with moly was ARPs spec a couple years back when this was built before the Ultra Torque lube came out then that would be the best bet. If really worried could torque it and have the mains mic'd.
Far as the Ultra Torque thread lube I have heard some negatives about parts being damaged before torque was reached because it was so slick. Which brings us right back to trying to replicate whatever the machine shop did being the best bet
If 80 with moly was ARPs spec a couple years back when this was built before the Ultra Torque lube came out then that would be the best bet. If really worried could torque it and have the mains mic'd.
