1.6 turbo comp ratio/ pistons

[pingu_turbo]

Hi, am almost ready to start building my 1.6t. I just wondered if anyone could recomend what/who's pistons i should get to lower my compression, also where to get them from?

Thanks

[burgo]

dont think you can buy pistons off the shelf mate i mite be wrong though

[mowgli]

find a serious engine spares place who has a Karlschmidt piston catalogue.

There must be a gm 1.6 8valve engine produced somewhere that has about 8:1 compression.

[j1400]

8.0:! is afr too low you'd want abotu 8.8-8.5 depending how much boost you are gonna run, but 8.8:1 is ok for upto a bar. it's easier to just have some of the chamber cut away to increase the chamber volume and this will drop the CR and still retain a good squish area to prevent knock.
Based on what I vae wokred out you'd want to increase chamber volume abotu 9cc's, this assumes the std gasket thickness is 1.2mm, so if it's different let e know, but I havent measured the thickness of one.

[NovaNeil]

How much power are you hoping for mate? and how are you controlling the fuelling?

[burgo]

sorry to highjack but neil have you ever heard of this before http://www.bgsoflex.com/megasquirt.html as im very tempted to use this for my turbo.