I believe it's 15 ft lbs., mine are more like 30 or 35 ft. lbs. I crank them down pretty good on a criss-cross pattern, alittle at a time, with SS split lockwashers under the bolt head.
I match my main hole to the boost channel and face the other 4 towards the transfer ports................oooh thanks man, i was looking all over the place for this piece of information and also do you have any idea how to make boost ports on a piston? is there an specific place ?
So your saying that its better to have one or two big.ports than having 4 or 5 big.ports? And whats the point of this ports? To get.more fuel into the mix?