welfarepc

Ive contact ARP... talked to RONF.. what a freaking idiot.

RONF has decided on behalf of ARP that since i got my bolts from FJT and i am using FJT rods that they cant provide me a stretch spec... im sure he will hear of FJT soon enough.
lol

i wish i could start over and just say they are Eagle H beams lol

so what is the offical rod bolt stretch on a 3/8 ARP 2000 -12 bolt?

i contacted FJT and he suggested to torque to 40ftlb with ARP lube. Either that or Im returning this stretch gauge! and i dont wana do that!

shortyz21

is that micrometer from WW2?

it doesnt seem very accurate

fjt

According to ARP tables it should be 40lbs/ft with ARP Molly Lube..
If you use W30 oil then its a bit higher.. Ive hear engine builders using anywhere from 43-48lbs/ft with regular w30 oil...

welfarepc

ive been told you only stretch bolts that have a nut. this doesnt. thats why i cant find a stretch spec.

naw the caliper is from china thats why it looks so rugged

TunerToys

I agree with FJT on this 40lbs w/lube shoudl be fine. We've been recommending this torque spec to our customers for about five years on our rods, and have not had a reported issue. (Of course there was one guy that used an impact wrench, but there's no warranty coverage on that kind of "damage")

Craig

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welfarepc

never doubted him just wanted to use this stretch gauge...
i guess thats what happens when u buy before you read. lol

quicksilver1689

i remember reading like .0058-.0062" or something along those lines.

V-SPEC 1

I've stretch mine to .0059 if that help.

fjt

This is the info i got from my supplier of ARP's for the specific bolts i suply with the rods..

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">The bolts need a stretch of approx .0055" to .006", which usually requires
about 50-55 ft-lbs if you are using the ARP Moly lube. It is higher with
standard oil on the threads</TD></TR></TABLE>

Now i asked my mechanic/tunner and he uses for ARP 2000 3/8" rod bolts on Eagles 43lbs/ft with the ARP Moly lube.. If using standard oil then he uses around 48lbs/ft.
Never had a problem using these figures and his cars are usually revved to 8500-8800rpms

fjt

So in my opinion.. I would go with 40-43lbs/ft on ARP lube... 45-48lbs/ft with sae W30 oil.

DRAGLS

ARp 2000 3/8" bolt

1.5" length .0060 stretch 45 ft/lbs


1.6" length .0047 stretch 58 ft/lbs

welfarepc

Thanks DRAGLS! Where did you look that up??

great info.

DRAGLS

anytime

downloaded the arp catalog.

welfarepc

a link would be amazing. or even just an ARP part number for the bolts.

DRAGLS

http://www.arp-bolts.com/Tech/TechTorque.html


1.5" 200-6207

1.6" 200-6209