Reduce cylinder head

[clio_manu]

I'm going to reduce cylinder head to increase the CR, i don't know how much can i reduce without having problems with the valves and the pistons i mean without having a crash between them, i would like some help, cheers.

 

[edde]

You just asked the same question didn't you?

You need to tell use more though what cams are you using springs etc.

IMO forget it unless you had known what your doing before hand.