Talk to me about con rods.

**oblark** · Thursday 21st August 2014, 20:45

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

**Dangerous Dave** · Thursday 21st August 2014, 22:48

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.

**Ettienne** · Thursday 21st August 2014, 23:07

Originally Posted by Dangerous Dave

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.

That sounds like a useful tread

**Dangerous Dave** · Thursday 21st August 2014, 23:08

Here's the forged rods thread, still can't find the other one

http://volvospeed.com/vs_forum/topic...na-comparison/

**Ettienne** · Thursday 21st August 2014, 23:10

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

**p fandango** · Friday 22nd August 2014, 05:55

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

**oblark** · Friday 22nd August 2014, 06:27

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.

**p fandango** · Friday 22nd August 2014, 06:29

Originally Posted by oblark

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.

wasn't there a rumour 850R's ran stronger rods than normal 850's as well

**oblark** · Friday 22nd August 2014, 06:32

There's loads of rumours about the rods

**Dangerous Dave** · Friday 22nd August 2014, 16:55

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

**oblark** · Friday 22nd August 2014, 17:48

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

**960kg** · Friday 22nd August 2014, 19:07

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