Dodge Cummins Diesel Forum - View Single Post - grumpy old know it all says no O-rings

***mattpopp*** · 07-06-2008, 05:42 AM

The only advantage i see using studs over bolts, is that you have to torque bolts higher to get the the desired torque at the threads. You lose torque on a bolt through it wanting to twist. A stud wont twist as you are just tightening the Nut. So if you torque a Stud and a Bolt to the same ftlbs you will have a bit less torque at the threads on the Bolt. And more you torque a bolt the more you fatigue it through the twisting of it. Thats my argument.

I dont know if yall use competition diesel forum but Moose(one of the founders of the site). He has a Ford that Joe Hellmen did the CTD swap on it for him. the cummins in it is putting out around a 1000hp. He is using studs with the factory head gasket. He was telling me he will not use fire ring or oring head. He wanted the head gasket to be the weakest leak. He had a good point, If something fails because of pressure or boost the head gasket is the cheapest fix.

__________________
07.5 6.7l 2500 MegaCab 6sp Auto, 4x4 Inferno Red, Tough Country front Replacement, Browns Rear Replacement, NFab crappie 6 steps, Painted Pocket Flares, 20x10 4.56 backspacing Black Rockstars, 35" Toyo A/T's, 6" Superlift, Air Bags,
96' 2500 4wd, 47RE, Ext Cab,5" TBE,AFE Drop in, 134k ANTI-

Poor People have been voting for Democrats
for the last 50 years... and they are still poor.

07-06-2008, 05:42 AM	#29 (permalink)
*mattpopp* UR FRIENDSHIP DUES R LATE Join Date: Oct 2007 Location: Cypress Texas Posts: 2,135 mattpopp's Truck Pics	The only advantage i see using studs over bolts, is that you have to torque bolts higher to get the the desired torque at the threads. You lose torque on a bolt through it wanting to twist. A stud wont twist as you are just tightening the Nut. So if you torque a Stud and a Bolt to the same ftlbs you will have a bit less torque at the threads on the Bolt. And more you torque a bolt the more you fatigue it through the twisting of it. Thats my argument. I dont know if yall use competition diesel forum but Moose(one of the founders of the site). He has a Ford that Joe Hellmen did the CTD swap on it for him. the cummins in it is putting out around a 1000hp. He is using studs with the factory head gasket. He was telling me he will not use fire ring or oring head. He wanted the head gasket to be the weakest leak. He had a good point, If something fails because of pressure or boost the head gasket is the cheapest fix. __________________ 07.5 6.7l 2500 MegaCab 6sp Auto, 4x4 Inferno Red, Tough Country front Replacement, Browns Rear Replacement, NFab crappie 6 steps, Painted Pocket Flares, 20x10 4.56 backspacing Black Rockstars, 35" Toyo A/T's, 6" Superlift, Air Bags, 96' 2500 4wd, 47RE, Ext Cab,5" TBE,AFE Drop in, 134k ANTI- Poor People have been voting for Democrats for the last 50 years... and they are still poor.