Arp Headstud Torque

[sky30]

What do i torque 11mm RB20/RB25 ARP head studs to ??

Also whan people have installed these have they used 2 washers per stud?

I heard they are a little bit too long and the thread bottoms out with only 1 washer.

Cheers

[r33_racer]

from memory i think the torque is 100ft/lbs for headstuds. and i dont recall there ever being any problems with stud length in the head. Only problems with studs for the mains for the three long ones which you need to use some out of a different motor vg30 or something which you use two washers on. Hopefully im pretty close to being accurate, if not surely someone else will clear it up.

[sweetr33]

hey im using arp headstud kit, i put my head on myself, think it was 80nm no probs with 1 washer

[T04GTR]

the corect torque for rb 11mm arp studs is. 70ftlb with the molly lube.

[T04GTR]

ps.. look on the back of the box

[sweetr33]

i didnt have a box, engine was put together previously with the head studs but hen i blew a headgasket after that so i pulled the head off n did it myself/

[sky30]

the corect torque for rb 11mm arp studs is. 70ftlb with the molly lube.

70ftlb is less thhan std??

Anyone else??

[sky30]

Anyone else??

[r33_racer]

its bloudy 100ft/lbs if you use oil...and its 79ft/lbs if you use their moly grease.

that is from arp.

that wasnt supposed to sound rude...so dont get wrong idea.

Edited August 11, 2007 by r33_racer

[sky30]

its bloudy 100ft/lbs if you use oil...and its 79ft/lbs if you use their moly grease.

that is from arp.

that wasnt supposed to sound rude...so dont get wrong idea.

Thanks Micheal, Its just that on the back of the box they give 3 differnt torques for 3 different tensiles, but how do you know what tensile you got, then in the box they put a paper that says 70ftlb i think.

[r33_racer]

im pretty sure its the last column for the highest tensile. Well thats the one we always use, havent had any problems yet. In all the boxes weve got i dont think they had a paper with it on there.

[drgnball34]

my builder told me today that we cant use all 14 arp headstuds. Apparenty the two for the middle of the head will cause oil gallery issues. So we going to opt to replace them with two standard ones instead. Has anyone used all 14 headstuds? This is for a NEO head onto a rb30 block. Im abit concerned as we going to push 2bar of t04z and NOS.

Edited June 12, 2008 by drgnball34

[NYTSKY]

76lbs to 80lbs. Thats what is in my new engine anyway.

[xsv_32]

I bought my set the other week and im not too sure on this but do you use the allen key at the top of each stud to put them into the block and then torque them up or just leave them hand tight and do all the torqing from the top end once the head is on? May sound stupid but I dont want to f**k this up!!

[Adriano]

I just nip them up a bit with the allen key. The reason the studs can get away with lower than stock torque is because the nut end uses a different thread pitch, which increases the torque-tension ratio by 20%

[Swiper the Fox]

76lbs to 80lbs. Thats what is in my new engine anyway.

correct...dont bottom them out either...1/2 a turn off bottom is best.