[C2] ARP bolt torque question
Thread Starter
Racer
Joined: May 2005
Posts: 440
Likes: 9
From: Chicago
ARP bolt torque question
Hi all, hope you are being safe.
We're ready to install a Ram 550hp clutch kit with a Ram 24lb flywheel in 64 with 383 sbc and 5 speed tko.
Usin Arp bolts for both there seems a conflict for the PP bolt torque spec. Arp says 45 lb with Ram suggesting about 32 lb. Some on line say 45lb on the pp bolts might lock up the clutch, i don't understand that logic but does anyone have had experience with this situation.
Please share any knowledge for this.
Thanks. Frank
frankgv@yahoo.com
We're ready to install a Ram 550hp clutch kit with a Ram 24lb flywheel in 64 with 383 sbc and 5 speed tko.
Usin Arp bolts for both there seems a conflict for the PP bolt torque spec. Arp says 45 lb with Ram suggesting about 32 lb. Some on line say 45lb on the pp bolts might lock up the clutch, i don't understand that logic but does anyone have had experience with this situation.
Please share any knowledge for this.
Thanks. Frank
frankgv@yahoo.com
Le Mans Master
Joined: Apr 2001
Posts: 5,438
Likes: 1,255
From: Sarver Pa
2021 C1 of the Year Finalist - Modified
45lb on the bolts might lock up the clutch ????? Seriously ? NOT. no way. I myself would give it 40 with blue locktite or whatever lube ARP sez and move on.
Race Director
Joined: Apr 2015
Posts: 17,571
Likes: 3,460
From: Fresno California
Racer
Joined: Jun 2020
Posts: 319
Likes: 262
From: Western Oregon
2021 C2 of the Year Finalist - Modified
I thought ARP bolts were tightened to a stretch?? Or maybe that's only for the rod bolts. I didn't feel comfortable with that myself so when I built my engine for my 72 Porsche 911 I had my shop torque and measure the bolts.
Melting Slicks
Joined: Jan 2018
Posts: 2,033
Likes: 2,222
From: Bellevue, WA
2023 C2 of the Year Finalist - Modified
2020 C2 of the Year Finalist - Unmodified
Thread Starter
Racer
Joined: May 2005
Posts: 440
Likes: 9
From: Chicago
Thanks all. I think that's why the ultra torque lube under the shoulder to torque to a stretch, right? Makes sense for bearing caps and flywheel , pp plate just : gut-n-tight, lol, with lock washers (to a point, with loctite)
Frank.
Frank.
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Racer
Joined: Jun 2020
Posts: 319
Likes: 262
From: Western Oregon
2021 C2 of the Year Finalist - Modified
Worked on cars all my life but the idea of measuring the stretch of a bolt was to much. Soo when I was building a new engine for my 72 Porsche 911 I took the engine to the race shop that was helping me and Mike did the torque/stretch on the ARP rod bolts.