At the suggestion of Paul De Doncker I have taken the valve pockets off the THR pistons. I am having all sorts of problems with cam timing so I stripped the whole bottom end today, modified the pistons and re assembled. I will be able to do this with my eyes closed shortly. (except for the adjustable cam timing)
Photos from Bruce McGregor's post
what piston did you use? Wiseco?
They are made by Wiseco but sold by THR.
Taken the valve pockets off?
I don't understand
Aussie slang. Yes taken the valve pockets off.
Lol... what does that consist of?
Removing the fly cut relief completely from both intake and exhaust sides. Back to the dome.
Ok. How does this help?
Assists with airflow across the piston crown.
Doesn't it reduce compression?
It would by a very small amount.