is it worth getten them domed to size of cylinder, im trying to reach big hp or are they designed like this for a reason

 

Give Martynj a PM. That's Martyn at Enginetuner (in case you didn't know).

They do head work and will definitely know the answer.

That said I'm at 527 bhp on my v4 heads with no porting and standard valves etc. (different cams though)

 

thats good going mate will give some pros a call

 

As above talk to a tuner as the spec of the heads need to match the rest of the mods as removing metal from the head will decrease your compression ratio.

 

All the recognised tuners will be able to alter thye bowl / squish volume to suit..........I was going to use Paul at Finch Motorsport then changed tack LOL

Shaun