L19 head studs
07-09-2009, 03:53 PM
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When you call ARP & depending on who you talk to, they will tell you 90-110 ft.lbs. However their ARP 2000 kit for the LSX block says 105 and is of a lower tensil strength material. On all the L19 I have used I usually go to 100ft. lbs. What we have seen is that the threads in the nut are not capable of suporting the loads that are created by the increased torque. To increase the torque value when using L19 & 2000 material studs LME sources nuts from ARP that have more material supporting the threads to help eliminate the deformation of the threads in the nut. So to answer you question. I would go to 100 ft. lbs. and you will be in good shape. If you want to get the stronger nuts you need ARP#APN12-2 This will help you out.
07-09-2009, 04:53 PM
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When you call ARP & depending on who you talk to, they will tell you 90-110 ft.lbs. However their ARP 2000 kit for the LSX block says 105 and is of a lower tensil strength material. On all the L19 I have used I usually go to 100ft. lbs. What we have seen is that the threads in the nut are not capable of suporting the loads that are created by the increased torque. To increase the torque value when using L19 & 2000 material studs LME sources nuts from ARP that have more material supporting the threads to help eliminate the deformation of the threads in the nut. So to answer you question. I would go to 100 ft. lbs. and you will be in good shape. If you want to get the stronger nuts you need ARP#APN12-2 This will help you out.
Where is my motor Brian!
Bryan Pomeroy
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07-14-2009, 11:51 PM
#12
So I was talking to a local engine builder today that told me that about a year ago ARP updated all of their torque specs for their head studs. For example, with the standard ARP LS1 head studs the old torque specs where 70lbs, and with the revised torque specs its 80lbs. I am suprised I didn't hear about this here.
07-15-2009, 03:23 PM
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fwiw,we have std ARP studs on Fireball's engine,i torqued them to 95ft lbs,If the heads are lifting it's not the fastener's fault.I do not use the L19 head studs because i do not see a purpose for them,but if it were me i would tq them to a minimum of 105ft lbs,fastener won't do any good it it isn't stretched properly
07-15-2009, 04:22 PM
#16
fwiw,we have std ARP studs on Fireball's engine,i torqued them to 95ft lbs,If the heads are lifting it's not the fastener's fault.I do not use the L19 head studs because i do not see a purpose for them,but if it were me i would tq them to a minimum of 105ft lbs,fastener won't do any good it it isn't stretched properly
But
you say 105
and ARP(they made them) say 90-95
why? i have not fired motor yet. so idk if heads will lift. also i dont want the threads to give out in the block. if you really think 105 is the best i can easily torque them down. but you tell me. your the better engine man.
