overboring shaved head

[StorminNorman]

I have overbored my piston .040 and shaved my head .020. I was wondering if anyone has done anything similar and what kind of results they had. I was also curious if I could take another .010 off the head and if anyone nows the max.

[jaytv1019]

1st, why would you do something like shave the head and get .040 over pistons if you don't know what the out come would be? -or do you and you are just looking for others experience?

2nd, why are thinking about shaving the head some more?

Not trying to be rude or talk down to you. I have no idea how knowledgable you are on the subject but I can help a little if you need it.

Later,

[StorminNorman]

I was rebuilding the motor and in order to get everything straight and true these are the things that needed to be dow. I don't really know exactly how to figure aproximately what compression I will be left with.........I have better than stock cams adjustable timming gear witch I heard that you need to advance a few degrees if you take off .047 from the head, except I am not sure how streetable this is. I also have a msd hooked up to help with the higher compression. I am also thinking of unshrouding the valves a little now that it is overbored .040. Not sure if it is worth the agravation though.

[rotorimp]

I wouldn't go another .010 just use those adj. cam gears and run 91. keep in mind that the front chain cover will also have to be shaved 0.020. I would also be careful what you do on the head--you can SH*t can a head real quick and actually lose performance by hoggin out the runners. stick with port matching and just concentrate on a clean build.

[StorminNorman]

Its funny you bring up the front cover the first time I took it apart I didn'tshave it and installed the distributer and it chewed the gear right off the end of it. That sucked. As far as the port and polish I have only gasket matched everything and cleaned up all the imperfections. I cheacked out an intake runner calculater and the ka is pretty much at its max bore for the rpms we can go to.

[StorminNorman]

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