ClioSport.net
Register a free account today to become a member!
Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
-
When you purchase through links on our site, we may earn an affiliate commission. Read more here.
Interchangeable cylinder heads
- Thread starter ALD
- Start date
They can, and they have a better chamber design, but you will need to be careful with CR as they are a slightly larger chamber as well as being a better shape.
you need to use 172 dephasor etc though of course.
197 head will require 197 inlet too, the 172 one doesnt match.
you need to use 172 dephasor etc though of course.
197 head will require 197 inlet too, the 172 one doesnt match.
Ive not done any back to back tests on the same engine but it seems to be a superior design to me (better shape) so I would expect at least some small gains.
In my case, the main gain is that I have a 197 inlet now, which means I can get at the plugs easily and its easier to change the oil filter.
Its not for any performance reason that I personally am using it, as being a turbo I can easily get more performance if I want it anyway but dont due to gearbox issues.
NorthloopCup
ClioSport Moderator
In R3 maxi guise they pull 230hp standard without headwork and also retain the standard inlet. Very well designed cylinder head imo.
bozothenutter
ClioSport Club Member
NorthloopCup
ClioSport Moderator
In a perfect world yes as they are intruder type pistons from the factory.
No RS2 won't match up at all as the bolt pattern is different and on the 197/200 head the ports are higher up. I modified a 172 head to accept a 197 inlet, but it's far too much hassle and work to be worthwhile doing.
NorthloopCup
ClioSport Moderator
bozothenutter
ClioSport Club Member
back to the thinking board then...*grin*
NorthloopCup
ClioSport Moderator
Lol! Just bang some 197 pistons in with a 1*2 head. You'll up the comp ratio quite nicely. I've got a full R3 maxi kit for mine.
bozothenutter
ClioSport Club Member
Lol! Just bang some 197 pistons in with a 1*2 head. You'll up the comp ratio quite nicely. I've got a full R3 maxi kit for mine.
fit and forget?
no machining etc?
How are the 197 pstonts quality wise?
what is in the maxi kit?
thinking about slowly building an engine up for fun, been reading up on the theory and such.
Might even come over to the UK because parts are soooo much cheaper there....
http://www.cliosport.net/forum/showthread.php?599541-Soon-to-be-turboed
the info you need is in there ^ from chips engine when being built
the info you need is in there ^ from chips engine when being built
As mentioned for the RS2 to fit the 197 head it would mean you would need a different base manifold, and its not one that is available, so would have to be custom made.
197 pistons secondhand plus a set of new rings is probably not much cheaper than a set of forged 1*2 high comps anyway?
That said, the 197 are better if you are going for moderate power and lots of miles, as they have better piston to bore clearances than you will need to run on forged.
197 pistons secondhand plus a set of new rings is probably not much cheaper than a set of forged 1*2 high comps anyway?
That said, the 197 are better if you are going for moderate power and lots of miles, as they have better piston to bore clearances than you will need to run on forged.
NorthloopCup
ClioSport Moderator
You'd need to check the combustion chamber for clearance on a 1*2 if using 197 pistons, but other than that yeah pretty much fit and forget.
The maxi kit is something that was offered as an upgrade package for the Clio R3 rally car. There were 2 different packages available - R3 maxi (230hp) or R3 maxi evo (250hp). In the maxi kit you got high comp pistons, heat treated rods, knobbly cams, exhaust manifold and a few other additions.
Yeah I'd agree with that chip definitely. I picked up a set the other day for £150 and I can get forged stuff for about £350 (ish) so it's only worth doing if your cars a daily driver I suppose (from a longevity point of view of course)
NorthloopCup
ClioSport Moderator
I'll send you a pic via SMS mate. Nice bit of kit tbf, and I *think* it'll fit in a 1*2!
NorthloopCup
ClioSport Moderator
Yeah they're a proper bit of kit ain't they! They're about 1k from Renault as well, so not excessive imo. Lol - hammer and a condom mate! If the hammer don't work, f**k it! Flol
bozothenutter
ClioSport Club Member
NorthloopCup
ClioSport Moderator
Look here in this post and you'll see what they look like: http://www.cliosport.net/forum/showthread.php?729447-On-the-hunt-for-a-clio-r3-exhaust-manifold
bozothenutter
ClioSport Club Member
Thanks,
longer primaries and secondaries I see, so it will make more torque sooner right?
is this to compensate for the peakiness of the engine?
longer primaries and secondaries I see, so it will make more torque sooner right?
is this to compensate for the peakiness of the engine?
NorthloopCup
ClioSport Moderator
It's more biased to making power sooner tbh, but obviously that will alter the torque spread too. I'll let you know how peaky the engine is when mines in and running! Lol
