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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 4k hot up.
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Tue, 03 June 2003 08:00
 
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nup, if you get it reground, then the lifters sit lower in the bore, and you can adjust the rockers a bit.
if you have high lift (like 1mm or more over stock, which is 8.5-9mm cam lift) then if you get the rocker towers machined by the same amount as the increase in cam lift, then it all works out sweet.
i have 11mm cam lift and shaved the rocker towers 2.5mm and it has quieter valves than stock 
almost all K type heads (K,3K,4K) have the same size exhaust ports and most have 27mm diameter intake ports.
there are some more restrictive ones which have 25mm ports, but you'll really want to stay clear of these...
there are also "big ports" which have 30-31mm intake ports. you can tell these by the welch plug at the back of the head.
K bigports (from 1100) are 22010 and 3K bigports (from 1200) are 24010.
anything else??
where are you located?
Cya, Stewart
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