172 Con rod and piston set

[Paulstewart20]

Hi, I need new pistons and rods and I'm refreshing pretty much everything, its a track only car and will almost certainly not be boosted in the future, it has 197 cams and injectors and was mapped at efi with the 182 manifold and a/c delete. I might possibly go throttle bodies or something like that in the future but that would prob be it. My question is what is the best rod and piston setup do I need 8.1, 11.1 or 12.1 comp ratio I don't intend on uprating anything else, if the benefits from a 12.1 wont have any other impact other than wearing out a bit earlier then that's fine but if its gonna start wearing everything else out fairly quickly and cause all sorts of other problems then maybe the 8.1 is best but at the same time I don't want to short change myself.
I'm looking at the Ktec kits as they seem to be the cheapest and use semi descent kit.

Wossner Clio 2RS Forged Piston & H-Beam Conrod Kits - Renault and Renaultsport parts and fitting by K-Tec Racing

Wossner Clio 2RS Forged Piston & H-Beam Conrod Kits by Wossner from K-Tec Racing Renault

www.k-tecracing.com

 

[JamesBryan]

You want high comp for NA.

Standard compression is in the 12:1 range.

 

[Paulstewart20]

You want high comp for NA.

Standard compression is in the 12:1 range.

Does this not damage other parts or need further uprating of other stuff too?

 

[JamesBryan]

Does this not damage other parts or need further uprating of other stuff too?

Not really, as I mentioned standard compression ratio is about the same anyway.

You would only want lower compression on a turbo setup to avoid detonation (knock).

 

[JamesBryan]

Apologies, standard compression ratio is 11.2

 

[robzracing]

You should be ok with 12.1 CR as long as it’s mapped properly, you use good quality rod and main bearings and ARP bolts.


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