Reply to "4V CC head porting with pressed bronze valve guides."

jeremieMember

Well, ok I see.

Lots of casting impurity can ruin the heads, that is clear, thought it was a disease of high pressure die cast alumium.

Until now I have alsmost touched nothing, made one exh port, and I did not enlarge it I just cleaned it, and I polished the according combustion chamber, on intake nothing touched, I may just clean the throat edges.

Notching the block is something I would have never done, psychologically to hard for me ^^

head can be replaced, I see often some much better than mine to sell on the internet for $500, but a block means another engine.

can you send me this for diagram which show what to be done on the combustion chambers with this 1/4 radiused stone ?

9/17/156:23 AM

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