I just put these studs in my head and used the 70 ft pounds that they recommended in their instructions. I noticed while searching the site that most of you are using 90-100 pounds. Why is that, and should I put more torque on them tomorrow?


http://i243.photobucket.com/albums/ff290/flamineclipse/Oct1627.jpge

When I rebuit my engine and upgraded to the ARP studs, I did 90ft/lbs. 40,000 miles later and the gasket is still holding fine.

http://forums.2gnt.com/dcboard.php?az=show_topic&forum=5&topic_id=103361&mode=full

Somebody in that post suggested that the additional torque could be due to the higher pressure numbers seen in the combustion chamber in a turbocharged engine, "but the arp torque numbers are really for a NA motor if you turbocharge the motor the pressure in the cylinder is higher and a greater clamping load is needed to prevent head-gasket failure." Another poster mentioned something about thermal expansion.

Those are just a couple of ideas that I found on a quick search. I'm sure there's more information laying around somewhere in this site.

Here's an extra one just in case you need more reassurance that everything should be ok:

http://forums.2gnt.com/dcboard.php?az=set_threaded_mode&forum=8&page=&topic_id=64941&prev_page=show_mesg

Oscar

I wish I had blown it, believe me, I do...

Thanks for the help man! I was having to search from my phone and every time I backed out if a topic, I had to start all over.

Honestly, I do mine from just past experience on 4G63's and 420a's. My NA's and turbo's have all gotten over 90. I guess I've always looked at the manufacturers numbers as a suggestion. And I work off those numbers as I see fit.

Because, obviously, I know better than their millions of dollars of R + D

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

That should be fine. I torqued mine to the ARP recommended torque and was spraying coolant out the block at high boost. Retorqued the same gasket to 90-100ft.lbs and never had an issue.

98 Eclipse GS Turbo
Built motor - MS2 - Holset hy35 - Zoom Stg 4 Clutch - 57.5mm TB - ARP Headstuds - Turbonetics wastegate - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - 650cc Injectors - Fidanza Flywheel - Cobra calipers w/ 13" Rotors - Oil Cooler - DevilsOwn meth injection

1981 Chevy Scottsdale
1987 Nissan 300zx - Chump Car
2001 BMW 325i