Talk to me about con rods.

Post 730874 by oblark on 2014-08-21 20:45:26

Has anyone got some imformation/photo`s of the difference between 850, V70R (ph1 series 3) and S60R con rods ?

Post 730921 by Dangerous Dave on 2014-08-21 22:48:58

850 and P1 x70 engines used a 139.5mm length rod and later engines used a 143mm length rod. There are also some 147mm rods used on the RN engine with a shorter piston (according to VS). Apparently there are differences in widths of the rods too. Also the stroke depth was different (not sure on which engines yet) one being 90mm stroke and the other 93.5mm. Trying to find a thread I saw comparing a selection of standard and forged rods.

Post 730924 by Ettienne on 2014-08-21 23:07:02

[QUOTE=Dangerous Dave;730921]850 and P1 x70 engines used a 139.5mm length rod and later engines used a 143mm length rod. There are also some 147mm rods used on the RN engine with a shorter piston (according to VS). Apparently there are differences in widths of the rods too. Also the stroke depth was different (not sure on which engines yet) one being 90mm stroke and the other 93.5mm. Trying to find a thread I saw comparing a selection of standard and forged rods.[/QUOTE] That sounds like a useful tread

Post 730925 by Dangerous Dave on 2014-08-21 23:08:57

Here's the forged rods thread, still can't find the other one http://volvospeed.com/vs_forum/topic/155507-aftermarket-rods-china-comparison/

Post 730926 by Ettienne on 2014-08-21 23:10:15

http://volvospeed.com/vs_forum/topic/44158-forged-or-not-s60r/

Post 730944 by p fandango on 2014-08-22 05:55:47

didn't i sell you my RN 90mm crank, so you'll want either 139mm rods with your original pistons, or 147mm rods with ME7 short skirted pistons. I know someone interested in buying that crank if you want to got 93mm stroke & S60R rods & pistons 850 on the left, ME7 on the right

Post 730947 by oblark on 2014-08-22 06:27:27

I've read those threads on vs and it says the early v70r has forged internals but I would like to see photographic evidence. Otherwise it's only hearsay.

Post 730948 by p fandango on 2014-08-22 06:29:51

[QUOTE=oblark;730947]I've read those threads on vs and it says the early v70r has forged internals but I would like to see photographic evidence. Otherwise it's only hearsay.[/QUOTE] wasn't there a rumour 850R's ran stronger rods than normal 850's as well

Post 730949 by oblark on 2014-08-22 06:32:46

There's loads of rumours about the rods :)

Post 731000 by Dangerous Dave on 2014-08-22 16:55:16

There's a rumour one of mine is bent.....

Post 731006 by oblark on 2014-08-22 17:48:32

Hopefully tomorrow I can throw sone light on the difference between the rods

Post 731013 by 960kg on 2014-08-22 19:07:25

I have proper pics. somewhere but need to delve! But to mention part numbers and not rumours the pics. show them for the upgraded rods from std. 850 to 850R which uses the V70 rods B5234T3 240bhp as you can see T4 is the R