Originally Posted by
MantisWorx
Maybe you are confused on what flex is?? I dont dis agree with the fact that you need a certain amount of flex but not on a crank, you will get more play from the bearings than you will from the crank. Exactly where do you think the flex will come from? think about it, your not going to get any flex between the bearings ( if you did the crank would bind)meaning it can only happen on the largest area of the crank!
I have seen a video about Cosworth engines where the engineers did calculate the zero headclearance at max rpm and indeed you could see a complete clear squish band on the piston. Flex is there and it is needed to stay alive. I just calculated it, at 44.000rpm the (lineair) acceleration of the piston in an half stroke a 3 gram piston can create about 30kg of force. With the conrod making 5 to 6 grams in total it can go up to 50kg, that is huge! It is for sure pushing and pulling hard on the crankshaft,
Originally Posted by
Z'Stein
Here are two pictures, and the engines are OS 18TZs.
Well, I tried to upload two pictures but don't know how.
You need to upload them....