arp 2000 rod bolts in manley rods. torque or stretch spec?

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BMGTZ

Grumpy old man from the school of hard knocks
Joined
Mar 9, 2007
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southside of perth WA
Seems Ive lost the paperwork that came with some Manley rods for 7 BOLT...probably when I robbed the arp lube for another build.

does anyone have the spec supplied by manley for the 3/8 arp 200 bolts? these are just H beams...

Arp site says you need to get the info from the rod manufacturer
 
Ive attached the Manley Rod Bolt spec paper in this post. It shows 65 ft-lbs using 30wt mineral oil as tested by Manley. They also show recommended torque value range between 60-70 ft-lbs is acceptable.

EXTRA INFO USING ARP MOLY LUBE
ARP 2000 bolts have their own spec torque setting, irrespective of the rods themselves but they do allow for a little extra torque/stretch. These are ARP manufacturer factory specs taken from the papers inside the ARP boxes using ARP moly lube when I rebuilt EVO and GVR4 engines. M8 is EVO 7 bolt crank rod bolts (37 ft-lbs). M9 is GVR4 6 bolt crank rod bolts (40 ft-lbs).

Link to thread: http://www.4gtuner.com/topic/8102-arp-parts-install-procedure-for-evo-i-iii-vr4/?p=98253

Now, a little bit further down the page on that forum link you will see:

***** EAGLE RODS & ARP2000 ROD BOLTS FOR GVR4 6-BOLT CRANK
As per paperwork, the 3/8" (9mm) ARP2000 rod bolts that come with Eagle Rods state 43 ft.lbs with ARP moly and a bolt stretch of 0.0055-0.0059" with no more than a 0.0001" stretch limit.*****

Note: The above quote is for 6-bolt cranks. It shows a 3 ft-lbs increase in torque setting for M9 bolts using ARP lube (40 to 43 ft-lbs = added 3ft-lbs) when torquing for aftermarket H-beam Eagle rods.

So if EVO 7-bolt ARP2000 M8 rod bolts was 37 ft-lbs for stock rods using ARP lube, then add the extra 3 ft-lbs to be 40 ft-lbs torque setting using ARP lube for aftermarket rods. I would consider that acceptible.
 

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Thanks Rob.

I found the same sheet.

Turns out that 50ftlb with arp lube gives 60 thou stretch with the arp bolts that that Manley supply. Which have a different head stamp to the eagle Manley are stamped 1.6 and eagle are stamped 1.5. ( have several sets of eagle rods to compare to)
 

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