Hello. Im planning on making some upgrades to my -83 eur S. Im going to put S2 heads and rise the compression a litte to ~10.5:1. Ive been offered some hotter cams and would like go get some thoughts on them.

What do you guys think? Are these to hot for a CIS eur S engine?

 

I have no clue how this cams affect drivability but maybe the vendor has an reference contact for you who bought a set!

 

good idea! I Will check.

 

Presumably the cams, with limited overlap, can be used for K-jetronic if you can tolerate a bit of jerky engine at low revs. What kind of valve springs do you intend to use? The factory springs cannot handle this type of valve lift.
Åke

 

Tack Åke! Ive asked for specs on open/closing of the valves. I was not aware i needed different springs. Do you have any suggestions?

 

So i got some more info.

Intake opens at 7° and closes at 61°

Exhaust opens at 53° and closes at 2°

this is at 1mm lift.

picture shows these cams(blue) and a standard euro S cam(red).

 

i think these values are a bit off. At 1mm lift the intake duration is 248 and exhaust 235. Not at al as extreme as the spec suggested.