Threaded View
-
07-18-2009 11:38 AM #1
crankshaft bearing speed and other questions ( might be kinda long!!! )
Just having some random thoughts going through my head, thought I'd pass them on and see if I can get some info. Thanks in advance.
1) A long time ago I saw a formula for calculating bearing speed for given engine RPM. Does any one here know that formula??
2) I was reading an article in GM High Tech Performance. Justin (?) Massingil from SAM was claiming that about 15% of an engines power is comsumed by ring friction. I know that measuring rotational torque of a piston,ring,crank assembly is a good way to measure this friction on the stand. I believe I was told that 20-30 ft/lb was norm for a street engine.
How loose can the ring package get and still provide adequate oil control on a street engine?? Is there a tension gauge or some chart I can buy or refer to?
3) Can I not run say a medium tension ring pack for oil control and have the crank mains and rods cut down for a little friction reduction??
Sorry if these are a little elementary, I've Googled and I can't seem to find what I want.
Again, thanks for reading and I appreciate the input....
Robert
This popped up on Facebook, one of those "Do you mean for the last 40 years..." moments. A drop dead easy and accurate way to check Toe In! -
Toe Adjustment