Author Topic: ARP Head Studs (Read 12223 times)

Turbinepowered · « **Reply #30 on:** August 20, 2008, 12:09:32 am »

Quote from: "theman53"

Like everything else I am probably overthinking and wrong, but I hope I am a little more clear on what I meant earlier is that ARP probably shouldn't say just do what the stock bolts call for. Lucas

Like I said, he didn't say that right off, I told him the factory procedure and he said to do that. In my case, I have a 1.5, so factory procedure was a three-step torque sequence, rather than extra quarter and half turns and warmups and cooldowns and retorques for stretch bolts.

Supposedly my headbolts were reusable, but I wasn't gonna use those crapped out old rusting things.

captainpartytime · « **Reply #31 on:** August 20, 2008, 10:15:45 am »

Quote from: "Jet A"

Actually, maybe i will sit down with a calculator tommrow and just figure it out. anybody have the thread pitch of the arp studs? are they the same as the block threads?

The block end is 1.75 and the head end is 1.25

zukgod1 · « **Reply #32 on:** August 20, 2008, 05:55:22 pm »

I just received this back from ARP in responce to my question.

"Hi there Daniel the torque specs for kit # 251-4701 is going to be 80ft lbs using ARP moly lube or 120ft lbs using 30wt motor oil. As for the sequence you're going to use the manufactures sequence and for torque it will be in three equal steps to our recommended torque specs.
The studs will be going into the block hand tight with lube being applied to both ends of threads and on both sides of the washers.

Thanks
John"

saurkraut · « **Reply #33 on:** August 28, 2008, 03:17:16 pm »

Quote from: "Jet A"

Comparing apples to apples, if the thread pitch is the same on the arp vs the raceware. the torque values should be the same.

Yes, if the friction of the threads and washer are the same. It is not, so you have different torque values between Raceware and ARP.

jtanguay · « **Reply #34 on:** August 28, 2008, 04:23:58 pm »

one thing that i dont get... why put the moly lube on the block end threads??? surely it doesn't really matter? just use regular engine oil?

monomer · « **Reply #35 on:** August 28, 2008, 07:31:00 pm »

Quote from: "saurkraut"

Quote from: "Jet A"

Comparing apples to apples, if the thread pitch is the same on the arp vs the raceware. the torque values should be the same.

Yes, if the friction of the threads and washer are the same. It is not, so you have different torque values between Raceware and ARP.

surface finish maybe different between manufacturers.

I ordered a full ARP kit from headbolts.com. TOTAL was $390 shipped (mains studs, head studs, con rod bolts)