Join Date: Sep 2007
S cams open up the top end at the expense of low end torque, as you might expect. The S cams allow higher compression by doing this.
In my not so humble opinion the S version was a paper tiger to impress journalists. The actual performance difference between S and L tunes was really effected by a 10% shorter final drive in the transmission.
If your son enjoys high rpm driving then by all means fit the S cams. The compression ratio is only relevant at below 4,000 rpm where the L needs the lower compression to avoid knocking.
1991 Alfa Romeo 164L 5 spd
White on grey leather 230K km, owned from new