Other ( non boosted Renault ) Difference between C1j, C2j and C3j?

[adrian00]

are there similarites in the c1j, c2j and c3j engine block? can you build a c2j engine block to a "c1j turbo" ?

 

[DaveL485]

@Brigsy @Adey @sparkie

 

[sparkie]

Yes you can. As long as its 1397cc and not 1390cc block. You also need to drill the oil way to the chain tensioner.

 

[Adey]

is not even worth doing that over a manual tensioner @sparkie

 

[adrian00]

How about the heads are those similar?
can you fit a c1j turbo cam in a c2j head?

 

[Adey]

cams are in the block and as far as I'm aware fully interchangeable. sparkie is the man with the knowledge though

 

[Adey]

you will need a turbo oil pump too

 

[Lewis]

Yes you can. As long as its 1397cc and not 1390cc block. You also need to drill the oil way to the chain tensioner.

1390cc engine was different liners and pistons, change these and I’m sure it’s possible to use the block.

I’m sure a few people have stuck with the manual tensioner as well.

 

[Brigsy]

Mine has c3j on the plate on the block, 760 code iirc so 1390cc, but the block is stamped c3g. I would suspect all blocks are very similar/same as c1j.

Gtt pistons and liners went straight in, and with all new bearings, rebuilt gtt oil pump/sprung campus tensioner, the oil pressure is better than any previous c1j’s. 55-60lbs hot at 3k.

Ive not seen the lower cc blocks before, is the crank the same as the rest of the models?

Quite a few bits are needed for the conversion, as above gtt oil pump, gtt pistons and liners, gtt rocker bar, gtt head if using stock ignition and a couple of small other bits. If you dont have tons of spares kicking about, it will be easier to pick up a c1j and stick it in.

 

[sparkie]

For some reason I thought the 1390cc block had a slightly smaller hole for the liner to fit in than the 1397cc block. I'm sure I had issues trying to do this before?