Hello everyone, I am looking at rebuilding and turbo charging a 2.0l black top engine, I'm going to up-rate all the internals first and may be in a position to get a lot of focus rs engine parts,

My question is,

Specifically what parts are different with the focus rs engine and the Zetec engine?

Do focus rs connecting rods fit the focus Zetec or would I need the focus rs crank shaft?

Can I change all the necessary parts and essentially end up with an rs engine?

Any info apriciated, thanks. Dean.

 

It's all the same mate. The exhaust valves are sodium filled though on a focus RS. I'm sure some people on here will have more info but in essence a focus RS mk1 is a turbo charged blacktop engine. Oh and bigger gudgeon pins on the rods and pistons.

 

Apriciate you quick reply mate, I got a little confused after reading another post by someone on another forum about the focus engine having 3 different sizes somewhere, may not apply to what I'm looking to do but this was the post, see below,

This seems to apply to the con rod connecting to the pistons but seeing as the other end of the conrod is a different size to the Zetecsboy will they go onto the Zetec crank shaft with no problem? I'm clueless haha.

Question-
Anyone got the sizes for rods in the silvertop zetec, black top and the Focus RS?

Or can Focus RS pistons fit on Standard blacktop rods?

Answer-
Silvertop - 136.14mm - 20.638mm pin
Blacktop - 140.84mm - 19.000mm pin
FRS - 137.00mm - 22.000mm pin

US (inc st170) - 139.19 - 20mm pin

Generally compression height of piston matches to the rod length so as long as you use the set it works in any of the various blocks.

 

As far as I know and I have known a few of my mates rebuild there internals into another block any blacktop block will be fine. Obviously it will need boring and honing to size. Don't mix and match your rods and pistons.

 

Let me know if you need the cams, it is a known performance upgrade to use an exhaust cam from a 1.8 N/A zetec in a focus RS mk1.

 

Thanks mate, I'll be sure not to



I didn't know that, I'll certainly be in touch if this is the case.

 

I think my biggest question is, did the focus rs and the Zetec use the same crank shaft?

 

Out of interest how much are you after for the 1.8 cams? From what I've read people just install the1.8 INLET cam?

 

yes,all cranks the same

 

Great, thank you

 

So are we in agreement that the crank shaft is the same and the only difference with the Zetec and rs engine internals is, con rods, pistons, valves, valve spring, cams.

Gear box? Clutch?

Very knowledgable forum!

 

Can anyone help me...? is an st170 engine block the same as an rs? or can it be used on an rs ? would any mods needed to be carried out to make it work? etc etc

 

Crank casing/gurdle is different

 

is that part of the actual block ??