All the web sites are correct -- it totally depends on which CA & SR engine, transmission and flywheel the guys pieced together. Nismo sells/sold several 225 mm clutches for S13 CA18DET which don't require an SR20 flywheel.

* S13 CA18DET: 225 mm
* S13 SR20DE: 225 mm
* S13 SR20DET: 240 mm
* other SR20DET: 225 mm

225 mm is the clutch facing area, rather than the diameter of the flywheel.

The question is will a 225 mm clutch will hold the torque? You can use a regular sports clutch 225 mm with a 750kg pressure plate ($550 NZD). But how much torque is that good for? Proably less than 300 lb ft I'd imagine, which a modified CA18DET can exceed.

Im using a exedy cushioned button clutch on my z18. Has put up with all the abuse I can throw at it over the last 5 years and is still going strong.

Has anybody done the conversion?

lots of mixed info on the net, hoping to find someone who knows how to best get it done

from research:
- Need to grind bellhousing
- may need to use S12 CA18DE starter motor (doesn't have a housing over the throw out gear)
- Some flywheel brands are beeter than others maybe... (im looking at using a light weight fly)

i want to use the SR20DET clutch becuase it's 225mm instead of 200mm diameter, which I'm hoping means i can hold 180rwkw with an organic type clutch palte

but also read, s12 starter has the wrong number of teeth. some flywheel dont need any mods. i've read some of the specs on some flywheels and they arn't the full 225mm size

ANY CLUES?

i have a CA18DET chromemoly 5kg flywheel and a clutch is like $650 for that

or i can proabbly buy and SR20DET light fly and clutch for $1000 and sell the CA flywheel


Any suggestions for a good CA clutch etc will also be interesting