Page 1 of 1
ARP2000 200-6208 stretch (Ti rods)?
Posted: Thu Dec 06, 2018 5:51 pm
by KnightEngines
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!
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Thu Dec 06, 2018 6:34 pm
by GOSFAST
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!
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Thu Dec 06, 2018 7:03 pm
by KnightEngines
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.
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Sat Dec 08, 2018 3:05 am
by jalai
Stretch specs from website.
https://arpcatalog.com/26/
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Sat Dec 08, 2018 3:54 pm
by steve316
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.
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Tue Dec 11, 2018 10:31 pm
by KnightEngines
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
Turns out sizing Ti rods is no-where near as much of a PITA as I expected, all within .0001" now.
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Tue Dec 11, 2018 10:36 pm
by cjperformance
What are the ti rods for mate? Whats their weight compared to the stock rods?
Cheers
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Wed Dec 12, 2018 3:42 am
by KnightEngines
Rod are for a 202
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.
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Wed Dec 12, 2018 3:56 am
by cjperformance
KnightEngines wrote: ↑Wed Dec 12, 2018 3:42 am
Rod are for a 202
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
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Thu Dec 13, 2018 3:26 am
by Biteme
Re: ARP2000 200-6208 stretch (Ti rods)?
Posted: Thu Dec 13, 2018 3:33 am
by cjperformance