The sound of your engine is like angels singing right at me!🥰
@SpeedofCheeseRacing
2 жыл бұрын
Me too! See you on the salt.
@akos127
2 жыл бұрын
Mark, serious? after a month you give us a 30 second video..... Happy New Year Mark, please make videos more extent and frequent in 2022.
@SpeedofCheeseRacing
2 жыл бұрын
Okay! I will make more video this year. Happy new year!
@user-gn2xo8sl6x
2 жыл бұрын
Мощность!!!
@hankburton2043
2 жыл бұрын
Keep them coming mark
@lucasmonks5767
2 жыл бұрын
They work
@MeXaNiK_Jeek
2 жыл бұрын
Good afternoon! My name is Evgeny, I am a student from Siberia, studying at NSTU NETI. In my spare time, I repair and tune my old Soviet two-stroke 125cc motorcycle. I have only a small lathe in the garage so far, but soon I will repair the milling machine as well. My engine has a piston stroke of 58 mm, the standard crankshaft is made separately: The trunnions are pressed into the crank web and that's why I couldn't center my crankshaft well. I'm going to make the crankshaft myself, it will be solid-edged and fairly accurate, but I'm interested in which steel is better to use for this? What kind of heat treatment of the crank web is required? What are the acceptable tolerances for such a responsible part? To what accuracy do you center the crankshaft? How do you calculate what should be the thickness of the metal around your crankpin and what should be the width of the crank web? What clearance do you use in two-stroke engines between the crankshaft and the crank case?
@SpeedofCheeseRacing
2 жыл бұрын
Hey Evgeny, Looks like you are on your way to being as crazy as me. I use 4340 for crankshaft webs. Not sure what the numbers would be in Siberia but you should be able to cross reference. I through harden to 38-42 RC. I leave .003/.004 interference/press fit on the main bearing fits, and a little less on the rod pin fits. I make my webs about the same thickness as stock and that is about as much that will fit. The area around the crank pin is as much as I can get, but I use smaller web diameter than original so it is a little thinner that I prefer but i have never failed one. Mine is two cylinders so a little more than a single but I try to get all the main bearing areas within .002. It takes some hammering and brute force but with patience you can do it. I want as much room around the crank as I can get. I don't rely on crank clearance to push the intake into the cylinder. I want enough volume that when the pipe pulls the intake into the cylinder there is plenty to pull in. I want to sometime race on Lake Baikal. Canceled this year. Maybe next year. Good luck!
@michaelmurphy2976
2 жыл бұрын
Awesome graphics! Speed of 🧀
@clutchupproductions332
Жыл бұрын
What kind of cylinders are those
@Headerflame
2 жыл бұрын
Sweet!
@hackerxxx543
2 жыл бұрын
Just wondering what is the cc of your domes, bore and stroke and the measurement form your tdc to the top of the exhaust port mm please thanks
@SpeedofCheeseRacing
2 жыл бұрын
Off the top of my head 25cc dome, 71mm bore 62 stroke 31mm TDC to top of ex
@yodamaw
2 жыл бұрын
Could you film the whole testing process?
@SpeedofCheeseRacing
2 жыл бұрын
Ill try
@powervalvepetesgarage
2 жыл бұрын
Yes that would be great, I'd like to know more about your dyno. Is it shop made? Are you taking power curve measurements?
@peterszczesniak1360
3 ай бұрын
😅😅
@timdryden3778
2 жыл бұрын
When you have time, your thoughts on offset con rods?
@SpeedofCheeseRacing
2 жыл бұрын
I dont really have any thoughts. I run 1mm offset because that is what was done in the past and what I have made everything to work with. It might be fun to play with that and see what happens. Years ago Smokey Yunick tested a bunch of offsets on small chevys. I dont remember much of it anymore, but it might be worth looking that up,
@timdryden3778
2 жыл бұрын
@@SpeedofCheeseRacing T/Y can you detail the offset? Is the offset on the big end, little end, and as compared to direction of rotation?
@SpeedofCheeseRacing
2 жыл бұрын
@@timdryden3778 Mine is offset toward the exhaust side by 1mm at the wristpin. Rotates forward so it stands the rod up and lessens the thrust on the intake side.
@timdryden3778
2 жыл бұрын
@@SpeedofCheeseRacing Thanks
@lunkydog
2 жыл бұрын
Are those the ones done with the wedge formed "ovaling"?
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