filfrederick

this engine has done exactly what i wanted, confuse people. i will do a proper write up of what i have done soon and i have heaps of pics as well.

I got some more tuning done this avo, just about ready for a test drive. i think it is going to be thirsty, i have increased the jets from 130s that were good for the stock 4k and i am now running 210s and it is still lean on what. it sounds amazing, a lot like a bike here are some more picks of the internals that i promised here is my crank and a stock one for camparison

camerondownunder88 is spot on. i used a 4k crank, but removed the side counterweights, knife edged, balanced and shot peened. no real reason for keeping the 4k block just thoughi i would see how far i could take it. ill put up some pics of the internals when i get a chance

if anyone is interested I just fired up my latest experiment yesterday. not tuned yet but idles and revs niceley 4k block+4age head bored out the block by 6mm, had to move the bores around a bit to get them in the middle of the casting, still about 3mm wall thickness. used 4age pistons and rods. 11.1-1 compression quad 40mm cv carbs also had to extend the camshafts by about 50mm and machine a block to hold all the bearing and seals ect. all external oil feeds and drains elongated head stud holes to suit 4k block def NOT easy conversion, nothing is bolt on everything is one off machiened. Phil