i'm lookin to buy these piston to raise the compression ratio of my favorit.. what i want to know is this, will the valves hit the piston head, and doi need to do any modification to make them work properly?

Edited 18 August, 200916 yr by flipper

no help? anyone?

i dont know anything about the 1300 skoda engines, might be worth contacting the user fruitbat on here, he's done a lot with these engines

Do you currently have a set of low-compression pistons with the relief machined into them (135 engine)? If so, then they may be an option, but the real way to raise the compression ratio on a Fav/Fel is to get the head skimmed; you can only have a slightly larger protrustion of the pistons than standard, so machining the head is the way to go. My current engine is at 11.5:1, with 26cc chambers - 1.6mm was taken off the head (although you need to accurately measure your current head volume as yours may be different)