ARP head studs - experiences?
#47
Originally Posted by special tool
I would like to point out that the mls on my car has been torqued/installed 3 times.
It is 100% fine and I plan on keeping for the dyno and drag races coming up.
It is 100% fine and I plan on keeping for the dyno and drag races coming up.
#48
Hey Man
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Originally Posted by Cory9584
...also where does ebs get their studs from? another similar application? arp told me theres no such thing.
#50
Originally Posted by tyro
I'll assume you're joking..you've mentioned several times that the wide fire ring gasket is the way to go..
That was a while ago.
I have good luck with the newer mls with the fancy glue coating on them.
#51
Originally Posted by billindenver
65 was not enough for mine with the head and block freshly milled. At least not with a stock type HG.
Is your car up and running again - and not losing coolant?
#53
Hey Man
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Originally Posted by billindenver
I went with 85. So far so good, but I have not checked retorque yet, nor has it been on the track.
#54
With the ARP studs, one end is fine pitch versus the stock studs that have identical thread pitch on each end (12x1.5).
In thinking of bolt design, how are thread pitch and applied torque related?
Given a coarse thread stud such as the stock head studs, would a fine pitch stud of the same material require more or less applied torque to achieve the same clamping force assuming identical thread lubrication? How much is the difference? Minimal?
Since the studs are made for EBS by ARP, who came up with the torque value? ARP?
In short, is 65ft-lb of torque applied to the stock studs the same as 65 ft-lb of torque applied to the ARP studs?
Either way, I'm going with 85.
In thinking of bolt design, how are thread pitch and applied torque related?
Given a coarse thread stud such as the stock head studs, would a fine pitch stud of the same material require more or less applied torque to achieve the same clamping force assuming identical thread lubrication? How much is the difference? Minimal?
Since the studs are made for EBS by ARP, who came up with the torque value? ARP?
In short, is 65ft-lb of torque applied to the stock studs the same as 65 ft-lb of torque applied to the ARP studs?
Either way, I'm going with 85.
#55
Burning Brakes
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I just increased the last pull, then let it sit overnight...and backed off 180 and retorqued. It then set several days while I waited for new exhaust studs to arrive and I retorqued again.
#56
Drive-by provocation guy
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After having my HG done recently with now Cometic MLS and ARP, I have had no issues.
Also, the guy that did mine did not go by ft/lbs but by distance and/or number of threads exposed to know how much to tq. it down.
Also, the guy that did mine did not go by ft/lbs but by distance and/or number of threads exposed to know how much to tq. it down.
#57
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Originally Posted by toddk911
After having my HG done recently with now Cometic MLS and ARP, I have had no issues.
Also, the guy that did mine did not go by ft/lbs but by distance and/or number of threads exposed to know how much to tq. it down.
Also, the guy that did mine did not go by ft/lbs but by distance and/or number of threads exposed to know how much to tq. it down.
#58
Hey Man
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Originally Posted by TRP951
the only thing about that is you have to make sure to install all them the same height or it will differ from stud to stud
I'm more concerned about my machine shop getting the old studs out.
#59
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Originally Posted by toddk911
Also, the guy that did mine did not go by ft/lbs but by distance and/or number of threads exposed to know how much to tq. it down.
#60
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Originally Posted by tyro
I suspect that to be the case; so do you have any idea why the engineers/assemblers at Porsche put so much Loctite in there to begin with?