ToDa30/4 Posted July 18, 2006 Report Share Posted July 18, 2006 ok what over size valves have u guys fitted & any mods to the valves to fit them & how much should i get the head shaved to give 9.8 to 1 please Quote Link to comment Share on other sites More sharing options...
ToDa30/4 Posted July 19, 2006 Author Report Share Posted July 19, 2006 ok what over size valves have u guys fitted & any mods to the valves to fit them & how much should i get the head shaved to give 9.8 to 1 please aw come on someone must kno :jamie: Quote Link to comment Share on other sites More sharing options...
Felix Posted July 19, 2006 Report Share Posted July 19, 2006 no idea with oversized valves. nothing is a direct fit. not worth the effort for a street engine in my opinion. not on a 4k anyway. just get a 3 angle seat job. measure your combustion chambers to work out what CR you have now (taking head gasket thickness into account). from there you should be able to work out how much you need removed. Quote Link to comment Share on other sites More sharing options...
ToDa30/4 Posted July 19, 2006 Author Report Share Posted July 19, 2006 cheers Felix .. Quote Link to comment Share on other sites More sharing options...
Blue_rolla Posted July 19, 2006 Report Share Posted July 19, 2006 have u thought about just puttin a 3k head on it..it'll up compression Quote Link to comment Share on other sites More sharing options...
ToDa30/4 Posted July 19, 2006 Author Report Share Posted July 19, 2006 i have a 3K-H head i could swap, whats the comp ratio with the 3K/4K combo please Quote Link to comment Share on other sites More sharing options...
Blue_rolla Posted July 19, 2006 Report Share Posted July 19, 2006 dunno myself but it wuld be close to what u want Quote Link to comment Share on other sites More sharing options...
dingostolemebaby Posted July 25, 2006 Report Share Posted July 25, 2006 i thought 3k heads were weak? personally i reccomend getting a belt sander and goin over the head for a while, n try that! haha jk, what motor is it? i think 1/4 a mm mite do the trick, i have no idea tho, just thinking of what ive seen of different thickness head gaskets used on rb engines Quote Link to comment Share on other sites More sharing options...
ToDa30/4 Posted July 26, 2006 Author Report Share Posted July 26, 2006 i thought 3k heads were weak? personally i reccomend getting a belt sander and goin over the head for a while, n try that! haha jk, what motor is it? i think 1/4 a mm mite do the trick, i have no idea tho, just thinking of what ive seen of different thickness head gaskets used on rb engines :lolcry: & do the valve job with a angle grinder . its a 4k motor & i will fit the 3k head (later types are ok ), i want to keep the 4k-c head incase the superecharger thing happens as its 8'5 to 1 Quote Link to comment Share on other sites More sharing options...
Hurricane Posted July 26, 2006 Report Share Posted July 26, 2006 there was a head on ebay that had 2lt cortina valves in it i think? might be worth a look. Quote Link to comment Share on other sites More sharing options...
jamesrolla Posted July 27, 2006 Report Share Posted July 27, 2006 it was a $500 head and it had SOHC gemini walves, it was full house but it would have made a little K motor scream cheers james Quote Link to comment Share on other sites More sharing options...
ToDa30/4 Posted July 27, 2006 Author Report Share Posted July 27, 2006 ive found a worked 4k head to fit & still keep my original one for s/c later.thanks for the input :lolcry: Quote Link to comment Share on other sites More sharing options...
Hurricane Posted July 27, 2006 Report Share Posted July 27, 2006 it was a $500 head and it had SOHC gemini walves, it was full house but it would have made a little K motor scream cheers james yeah thas the one, iwas thinkin of gettin it but lack of cash put a stop to that :lolcry: Quote Link to comment Share on other sites More sharing options...
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