ARP main bolts
July 29th, 2018, 03:49 PM
#1
Kyle
Thread Starter
Join Date: Feb 2018
Location: Annapolis, MD
Posts: 105
ARP main bolts
Should I get ARP main studs (184-5401) or main bolts (184-5001)? Is there any true benefit to studs over bolts? Just a quick question.
EDIT: Budget is no big deal if it is truly superior and will hold up over time, anyways they studs are only 30 dollars extra.
EDIT: Budget is no big deal if it is truly superior and will hold up over time, anyways they studs are only 30 dollars extra.
Last edited by 87Brougham; July 29th, 2018 at 03:52 PM.
July 30th, 2018, 12:56 AM
#3
Registered User
Join Date: Nov 2015
Location: So. Ca.
Posts: 651
We've all heard studs are stronger and I've selected studs on a BBC project I'm doing, but Olds sent millions of engines out the door under warranty with bolts. To this day the high horsepower factory engines use bolts. Whether bolts or studs, research proper torque and oiling of fasteners. A major percent of failures is due to improper torqueing procedures. On my Olds engines I will be using ARP bolts. Good luck with your project.
July 30th, 2018, 06:36 AM
#4
Kyle
Thread Starter
Join Date: Feb 2018
Location: Annapolis, MD
Posts: 105
We've all heard studs are stronger and I've selected studs on a BBC project I'm doing, but Olds sent millions of engines out the door under warranty with bolts. To this day the high horsepower factory engines use bolts. Whether bolts or studs, research proper torque and oiling of fasteners. A major percent of failures is due to improper torqueing procedures. On my Olds engines I will be using ARP bolts. Good luck with your project.
July 30th, 2018, 07:25 AM
#5
Registered User
Join Date: Nov 2008
Location: Central Fl
Posts: 7,828
Studs pull differently than bolts, mainly because the load is distributed differently, via top and bottom threads, not just the bottom like a bolt.
And yes today’s engines use bolts, but their internals are better, lighter etc. And in most cases they’re using multiple bolts, ie LS and Hemi engines.
July 30th, 2018, 02:34 PM
#6
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,310
As an aerospace engineer specializing in structures, I can assure you that the straps over the main caps are less than worthless. They don't stiffen the cap - since the cap is already much stiffer than those straps - and as such they don't pick up any load. They are about as effective as the oil restrictors in the cam bearing passages.
July 30th, 2018, 02:54 PM
#8
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,310
1964-1976 motors use 7/16" studs. Be aware that head studs won't have the provisions for accessory bracket mounting.
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