Pro Comp/KMJ head stud torque-Copper Coat Head gasket ?
#3
there is another thread here where a guy said he talked to the owner, and said do not exceed 65ftlbs.... so since he talked to the guy who sells the KMJ studs, and said do not go over 65. not sure if i would either haha
also to the OP, i have used gaskets dry, and no problems.
i re-use head gaskets also, so to make sure the water jacket seals i lightly copper spray them.
like when i **** a piston, i open er up, replace the piston, and then quick spritz the hg and then slam it back down.
no issue.
i would say stop at 65ftlbs 75 max like ^he says, or call the owner at KMJ and as him, i dont think ours cam with spec's either! thats why i just did the ARP 40-80
#4
Originally Posted by LS1 240sx
Thats badass. wow. Im running kmj head studs as well. 60 bucks and ive thrown 18psi threw a 76mm and they stayed put. one thing that gave them a bad name was when installing they would snap well talking to the owner about he said DO NOT exceed 55 ft lbs. during install. I did exactly that and they went on fine and have been holding up about 4 months of abuse.
Thats badass. wow. Im running kmj head studs as well. 60 bucks and ive thrown 18psi threw a 76mm and they stayed put. one thing that gave them a bad name was when installing they would snap well talking to the owner about he said DO NOT exceed 55 ft lbs. during install. I did exactly that and they went on fine and have been holding up about 4 months of abuse.
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#8
TECH Fanatic
iTrader: (9)
I have been running these on 3 diffrent projects 06 gto, ls1 swap mustang and now my 88mm 5.3
the 06 gto I torqued down to 75lbs with no problem holding 22psi through a built engine
(all the same size studs)
the ls1 swap mustang tried to go to 75lbs and snapped one of the long studs in the block, back them all back off and went 65lbs no problem.
my 88mm 5.3 build copper coated every layer and torqued to 65lbs, tuning will began this weekend. will post up results looking to make 750rwhp around 22psi
the 06 gto I torqued down to 75lbs with no problem holding 22psi through a built engine
(all the same size studs)
the ls1 swap mustang tried to go to 75lbs and snapped one of the long studs in the block, back them all back off and went 65lbs no problem.
my 88mm 5.3 build copper coated every layer and torqued to 65lbs, tuning will began this weekend. will post up results looking to make 750rwhp around 22psi
#9
TECH Apprentice
Are all of you using motor oil or assembly lube, or the ARP grease when torqued to these numbers??
I have done 75 in three increments, with ARP's lube.
If using oil you wouldn't have the same torque I do using the lube, and the 65 lbs some are doing could be the same as my 75 with the ARP lube.
I have done 75 in three increments, with ARP's lube.
If using oil you wouldn't have the same torque I do using the lube, and the 65 lbs some are doing could be the same as my 75 with the ARP lube.
#14
12 Second Club
iTrader: (27)
Originally Posted by LS1 240sx
Thats badass. wow. Im running kmj head studs as well. 60 bucks and ive thrown 18psi threw a 76mm and they stayed put. one thing that gave them a bad name was when installing they would snap well talking to the owner about he said DO NOT exceed 55 ft lbs. during install. I did exactly that and they went on fine and have been holding up about 4 months of abuse.
Thats badass. wow. Im running kmj head studs as well. 60 bucks and ive thrown 18psi threw a 76mm and they stayed put. one thing that gave them a bad name was when installing they would snap well talking to the owner about he said DO NOT exceed 55 ft lbs. during install. I did exactly that and they went on fine and have been holding up about 4 months of abuse.
#15
Just an update to anyone who finds this thread in the future.
Installed the LS9 gaskets ($91 shipped at Summit/price match gmpartsdirect) and Pro Comp studs and all is well.
car cruises at about 190* and will get up to ~195 in traffic.
Ive gotten in to boost several times- would have definitely overheated previously and it creeps to about 205-208 after 3-4 boost pulls then goes right back down to 195 within 30 seconds.
thanks for all the input.
I torqued to 75lbs using a 1/2 to 3/8 adapter and a small extension using oil.
25lbs on the small uppers.
there were some small QC issues I noticed, the hex in the top of the big studs was off center on a few and not very well finished- i did have to tap the hex drive socket into a few of them in a vise before installing them in the engine- I can live with that.
also the small studs had no hex- not sure if the ARP's do or not- just ran then down with a nut- held the smooth part of the stud with a pair of pliers and backed the nut off.
Installed the LS9 gaskets ($91 shipped at Summit/price match gmpartsdirect) and Pro Comp studs and all is well.
car cruises at about 190* and will get up to ~195 in traffic.
Ive gotten in to boost several times- would have definitely overheated previously and it creeps to about 205-208 after 3-4 boost pulls then goes right back down to 195 within 30 seconds.
thanks for all the input.
I torqued to 75lbs using a 1/2 to 3/8 adapter and a small extension using oil.
25lbs on the small uppers.
there were some small QC issues I noticed, the hex in the top of the big studs was off center on a few and not very well finished- i did have to tap the hex drive socket into a few of them in a vise before installing them in the engine- I can live with that.
also the small studs had no hex- not sure if the ARP's do or not- just ran then down with a nut- held the smooth part of the stud with a pair of pliers and backed the nut off.
Last edited by ronnieforrester; 01-23-2013 at 07:49 PM.