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Giday all. On my way out of cebu, back to perth, I went to the middle of hell, the streets of old cebu city, stopped in at all the stores that sell surplus engine parts and found the worlds holy grail of toyota k engine parts. ANGELS SING!! So, when i head back, i will have myself a correct 4K-U cylinder head, with the lugs under 1 and for indicating its for dished 4K-U pistons. FYI, this head was stamped number "1" so our wiki page is incorect. The combustion chamber section of the head is notably smaller in volume than my non twin squish head, designed for flat tops. In photos you cannot really tell, but when its in your hand, u can visually see with depth perception fro your 2 eyes, that the chamber is much smaller. My question to you all. How much of a difference do we all predict this will give me with economy and power? That is; going from the incorrect low compression setup, to the correct compression setup. I have no way of measuring power output, so i will be basing my findings on economy alone. Just wondering if anyone has any experience with this or has any idea how much improvement i might expect to see.. I believe i will have to do something with the push-rods as Banjo has warned me the thickness of this head would be different to that of a std flat top 4k head. Also the man at the suprlus store, in broken english, mentioned this head being different height to another (some other head, not specific). Our wiki page shows this information for push rods: 4K - 186mm 4K(with lugs) - 180mm 5K(solid lifter, D-Dish piston) - 180mm I didnt measure mine because i didnt think about this, but i think this data shows that the 4k with lugs (for dish pistons) would have a shallower head height... is this correct? If so I'm thinking ill be able to just cut and weld my pushrods down from 186 to 180 mm. Every second man is a welder with a welding shop where i live, so that wont be a problem. Further info for others. The Toyota genuine model number for a 4K-E head is exactly the same as that for a 5k head. this means heads will line up bolt together wiht differnet size blocks, and are relatively interchangeable with some other adjustments necessary. They share the same head, and compression ratio is just slightly different due to the bore size. the 5 k (d dish) has higher compression ratio (than 4KU D dish) purely because its bore size is larger. er
