Swapping my cylinder head on my Golf 1.8 CL 1993

Thanks for the reply its good to know that I can swap my head over although you say it wont give me the 15 bhp I thought it would give me. I know that the compression ratio of my engine is 9.0:1 and that the ratio for the GL engine is 10.0:1 both having monomotronic fuel systems. I was thinking that the compression was just increased on the GL head because it had been skimmed but perhaps there's more to it than that, maybe I would need a different crank and maybe a shorter throw on the conrods to increase the ratio? I was also thinking that I could drill out my flywheel for increased acceleration and perhaps stick in a fast road cam too?

Actually the only thing you have to do to change the ratio is change the pistons thats the only difference.

OK you never never "drill" your flywheel that will put it out of balance for sure & the engine will run like crap! If you want to lighten your flywheel take it to a machine shop & have them machine it properly. If you take too much off you will lose drivability because your decreasing the rotating mass & 4 cyl's don't like that at idle.