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ARP2000 200-6208 stretch (Ti rods)?

General engine tech -- Drag Racing to Circle Track

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KnightEngines
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ARP2000 200-6208 stretch (Ti rods)?

Post by KnightEngines » Thu Dec 06, 2018 5:51 pm

Got a set of custom Ti rods in, they have ARP2000 bolts, part nu 200-6208.

They are 1 of 2 sets made over 10 years ago & I cannot get manufacturer stretch specs for the bolts, so I'm going to have to go with whatever you'd normally stretch these bolts to, but ARP do not list stretch for them - they just refer you to manufacturers web site, which in this case does not exist!

I *think* it'll likely be around .006", but these rods cost a LOT & cannot be replaced, so taking no chances!

GOSFAST
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by GOSFAST » Thu Dec 06, 2018 6:34 pm

KnightEngines wrote:
Thu Dec 06, 2018 5:51 pm
Got a set of custom Ti rods in, they have ARP2000 bolts, part nu 200-6208.

They are 1 of 2 sets made over 10 years ago & I cannot get manufacturer stretch specs for the bolts, so I'm going to have to go with whatever you'd normally stretch these bolts to, but ARP do not list stretch for them - they just refer you to manufacturers web site, which in this case does not exist!

I *think* it'll likely be around .006", but these rods cost a LOT & cannot be replaced, so taking no chances!
Those bolts need to be "stretched" .0065"/.007" to be correct! This is according to ARP!

Thanks, Gary in N.Y.

P.S. Using the "conventional" torque method it would work out to be 55# with the ARP "Ultra-Torque" lube, this isn't the same as the older "Moly" lube ARP once supplied!
Jan. 2016 - New York Street Ride 7.56 @ 190 @ 3800#
(https://www.google.com/url?sa=t&rct=...12064104,d.cWw)

KnightEngines
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by KnightEngines » Thu Dec 06, 2018 7:03 pm

You sure? That seems like a lot, the 1.6" uhl ones are .0058", these are 1.75" uhl, so I expect more, but not that much more!
Torque will not apply, need to use special lube to avoid galling the threads with Ti rods, so will be different to arp torque spec.

jalai
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by jalai » Sat Dec 08, 2018 3:05 am

Stretch specs from website.
https://arpcatalog.com/26/

steve316
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by steve316 » Sat Dec 08, 2018 3:54 pm

not for your application but my bolts ( arp 2000- 1.6x7/16) were 4.5 to 5.1. I would email teck line for more info.

KnightEngines
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by KnightEngines » Tue Dec 11, 2018 10:31 pm

Jalai - that's the sheet I was looking for, thanks!

Stretched the bolts to .0065", came out at about 62ft/lb with the lube I have to use.
Rods were up the sh|t, varied almost .0015" in big end size :shock:
Turns out sizing Ti rods is no-where near as much of a PITA as I expected, all within .0001" now.

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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by cjperformance » Tue Dec 11, 2018 10:36 pm

What are the ti rods for mate? Whats their weight compared to the stock rods?
Cheers
Craig.

KnightEngines
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by KnightEngines » Wed Dec 12, 2018 3:42 am

Rod are for a 202 :lol:

They weight just a bit more than nothing!

Got a JZed head for it here too, and dry sump stuff, and 50mm webers and all sorts of other cool shit.

cjperformance
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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by cjperformance » Wed Dec 12, 2018 3:56 am

KnightEngines wrote:
Wed Dec 12, 2018 3:42 am
Rod are for a 202 :lol:

They weight just a bit more than nothing!

Got a JZed head for it here too, and dry sump stuff, and 50mm webers and all sorts of other cool shit.
Ti rods for a 202! Wooah.
Must be holden 6 month, i have a 179 HP! Just about to build up, turbo, efi, 75hp n2o, h2o/meth injection, no ti rods unfortunately #-o
Craig.

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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by Biteme » Thu Dec 13, 2018 3:26 am

I reckon you need one of these.
https://m.youtube.com/watch?v=Ixdm80LSf1A

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Re: ARP2000 200-6208 stretch (Ti rods)?

Post by cjperformance » Thu Dec 13, 2018 3:33 am

Biteme wrote:
Thu Dec 13, 2018 3:26 am
I reckon you need one of these.
https://m.youtube.com/watch?v=Ixdm80LSf1A
Very nice!
Craig.

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