GN1 Head combustion chamber volume?

[boostmaster]

Just CC'd my GN1 heads the newer casting an they were right at 50CC's does that sound about right?
That's a pretty big chamber volume compared to the stock head.

 

[ek02]

They are adsvertised to be 46 cc's. The stock head is 48 cc's. Maybe your valves have been sunk if the heads are not new.

 

[boostmaster]

Yeah I saw that on Champions web site. These are not brand new but have been repaired and redone. Thanks for the input.