View Poll Results: GM or ARP Head Bolts?
GM Head Bolts
3
12.50%
ARP Head Bolts
21
87.50%
Voters: 24. You may not vote on this poll
GM or ARP Head Bolts?
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From: Arlington, Texas (Dallas Area)
GM or ARP Head Bolts? With aftermarket "milled" heads, which head bolts are better? I know ARP is supposed to be better by popularity, etc. The GM bolts are about $100 cheaper. Are the ARP's stronger, hold more torque? Or are the GM's just as good? Any quick answers are appreciated because I need to order one or the other today. (Also, some NHRA classes disqualify you for using aftermarket head bolts; I've heard of this happening!)
I bought ARP head bolts b/c they are not only stronger (by a long shot) but you can reuse them!
GM bolts are cheaper for sure, but if you ever swap anything more than once you might as well have spent the $ on the ARP's as they are TTY style and cannot be reused once stretched
They will pay for themselves
GM bolts are cheaper for sure, but if you ever swap anything more than once you might as well have spent the $ on the ARP's as they are TTY style and cannot be reused once stretched
They will pay for themselves
I think that you left out the ARP Head Studs. But maybe you will need to remove the heads while the engine is still in the vehicle. I cannot remove my heads with the engine in my Jimmy, so I am gonna use studs (added insurance). I voted the ARP's.
Originally Posted by brad8266
ARP head studs FTW!!!!!!!
Not only are they reuseable, but they also keep you from having to clean the bolt holes again if you ever change to another set of heads.
Food for thought....
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Originally Posted by marv
Same here. I voted ARP bolts, but would rather use studs, which is what I put in mine.
Not only are they reuseable, but they also keep you from having to clean the bolt holes again if you ever change to another set of heads.
Food for thought....
Not only are they reuseable, but they also keep you from having to clean the bolt holes again if you ever change to another set of heads.
Food for thought....
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ARP Bolts for sure! Properly installing the GM torque to yield bolts would be a pain. The ARP bolt head is slightly smaller too so it'll come out and go back in much easier. The reason I say this is cause on my car, there was a slight clearance issue with getting one of the bolts out. Getting a GM bolt back in would have been a pain.
APR studs or GM head bolts. oh yea, and when you do your head swap, just pull the whole motor, so many people have broken head bolts or messed stuff up trying to do it in car.
i removed my motor out the bottom and it was fairly easy. i am however going to attempt a head swap in car becuase i already have ARP head studs
i removed my motor out the bottom and it was fairly easy. i am however going to attempt a head swap in car becuase i already have ARP head studs
Originally Posted by marv
Eh, just swap them in the car. It's not that bad.
im tired of hearing TTY all the time... GM head bolts are not TTY, TTY means that you torque something down and it breaks off and thats the torque specs. they use TTY bolts on sky scrapers.
the reason why the GM bolts are degreed is becuase its much more acurate than torquing. not becuase they are "TTY"
the reason why the GM bolts are degreed is becuase its much more acurate than torquing. not becuase they are "TTY"
Originally Posted by Cop Car
im tired of hearing TTY all the time... GM head bolts are not TTY, TTY means that you torque something down and it breaks off and thats the torque specs. they use TTY bolts on sky scrapers.
the reason why the GM bolts are degreed is becuase its much more acurate than torquing. not becuase they are "TTY"
the reason why the GM bolts are degreed is becuase its much more acurate than torquing. not becuase they are "TTY"
http://www.canadiandriver.com/articles/jk/040303.htm
http://www.xmission.com/~kd7olf/torque.html
http://www.robbos.com.au/myweb/Tech_Bolts.htm
What is the torque to yield tightening method?
Torque to yield is the method of tightening a fastener so that a high preload is achieved by tightening up the yield point of the fastener material. To do this consistently requires special equipment that monitors the tightening process. Basically, as the tightening is being completed the equipment monitors the torque verses angle of rotation of the fastener. When it deviates from a specified gradient by a certain amount the tool stops the tightening process. The deviation from a specified gradient indicates that the fastener material as yielded.
The torque to yield method is sometimes called yield controlled tightening or joint controlled tightening.
Torque to yield is the method of tightening a fastener so that a high preload is achieved by tightening up the yield point of the fastener material. To do this consistently requires special equipment that monitors the tightening process. Basically, as the tightening is being completed the equipment monitors the torque verses angle of rotation of the fastener. When it deviates from a specified gradient by a certain amount the tool stops the tightening process. The deviation from a specified gradient indicates that the fastener material as yielded.
The torque to yield method is sometimes called yield controlled tightening or joint controlled tightening.