TheWolf
02-21-2006, 12:23 PM
Someone has requested some ARP fastner torque specs a couple of weeks ago. Here are common ARP fastners and their specs and stretch lengths.
5/16 ARP Custom Age 625 3/8th's bolt head 32ftlbs with .0062"-.0066" stretch.
5/16" ARP 2000 3/8th's bolt head 28ftlbs with .0048"-.0052" stretch.
3/8" ARP 2000 7/16th's bolt head 43ftlbs with .005-.0059" stretch (SR20det forged rods usually use this)
7/16" ARP L-19 1/2" Bolt Head 79ftlbs with .0073"-.0077" stretch
7/16" ARP 2000 7/16th's bolt head 75ftlbs with .0064"-.0068" stretch
7/16" ARP 8740 7/16th's bolt head 63ftlbs with .0059"-.0063" stretch
Torque Values are for ARP Moly Lube. If you don't have ARP moly lube use 30wt oil and measure using stretch.
Always keep initial length of fastner on file and if bolt ever increases more than .001" in untorqued length... replace.
5/16 ARP Custom Age 625 3/8th's bolt head 32ftlbs with .0062"-.0066" stretch.
5/16" ARP 2000 3/8th's bolt head 28ftlbs with .0048"-.0052" stretch.
3/8" ARP 2000 7/16th's bolt head 43ftlbs with .005-.0059" stretch (SR20det forged rods usually use this)
7/16" ARP L-19 1/2" Bolt Head 79ftlbs with .0073"-.0077" stretch
7/16" ARP 2000 7/16th's bolt head 75ftlbs with .0064"-.0068" stretch
7/16" ARP 8740 7/16th's bolt head 63ftlbs with .0059"-.0063" stretch
Torque Values are for ARP Moly Lube. If you don't have ARP moly lube use 30wt oil and measure using stretch.
Always keep initial length of fastner on file and if bolt ever increases more than .001" in untorqued length... replace.