Experts... Degrees before TDC?
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Race Director
Joined: Nov 2000
Posts: 16,416
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From: NC,USA
Originally Posted by CFI-EFI
The con rod isn't a lever. All it does is push. That is, transfer the pressure exerted on the piston to the crankshaft. That transfer is most efficient when the rod and crank form a 90* angle. Among other things, the length of the rod, can affect the crank position where this occurs, SLIGHTLY.
The LEVER is the crank arm. If you want more leverage twisting the crank, increase the length of the crank arm. Generally, we call that "stroking" the engine. Like making a 383 out of a 350.
I don't understand the last part, of your last sentence, at all. What are you referring to as being "geared"? What is being "matched"?
RACE ON!!!
The LEVER is the crank arm. If you want more leverage twisting the crank, increase the length of the crank arm. Generally, we call that "stroking" the engine. Like making a 383 out of a 350.
I don't understand the last part, of your last sentence, at all. What are you referring to as being "geared"? What is being "matched"?
RACE ON!!!
Geared/matched... was searching for words...
I know the crank is the "Lever" I'm just wondering if a longer rod has more "Leverage on" the crank.
I'm not really sure what I'm saying... probably as clear as mud
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by ZD75blue
The way I'm thinking about this... Once you are beyond 90 degrees you have a piston pushing on a rod. The rod is at an angle to the crank... the longer the rod, along with the angle the more distance from the rod to crank center to center. Longer lever?!?!
I know the crank is the "Lever" I'm just wondering if a longer rod has more "Leverage on" the crank.
I know the crank is the "Lever" I'm just wondering if a longer rod has more "Leverage on" the crank.
Consider the con rod as a push rod. That is all it is.
RACE ON!!!
