what effect does the weight of a piston and rod have on the rpm that a given engine can run, I know it revs quicker the lighter it is, but does it have an affect on the redline.

 

This is just a stab in the dark cause im no engine builder, but if they were lighter the should be able to rev higher without as much stress. That is if they were lighter and almost or as strong as the heavier componet.

I do know that lighter pistons/rods will make more power because of the lesser rotating mass....but thats a no brainer lol.

 

Lighter pistons and pins put less load on the rod and crank so lighter parts will allow longer life at high rpm. You are correct that lighter parts (lower inertia) get more of the hp to the flywheel when the engine is accelerating, but for a steady state rpm, the wieghts don't limit the rpm...well unless it comes apart from the inertia (g loads).

It's kinda running with an extra 30 pounds around your belly. (I resemble that.) Your heart is stressed more and may give out sooner. I keep my "rpm" down to a jog.

 

thats the best way I have heard it put, I like that. and thank you, you answered my ?

 

To win races "ya got to keep the RPM's UP" dude.

(A quote from "Dyno" Don from the mid '60's)


Try Bud Light it's skinny bear.

 

Nah the old man like Scotch and Burbon... he doesn't touch any light beverage ever.

 

Does High-test black coffee count as "light"?

 

A man of good taste.

 

Damn skippy it does.

 

I am running a 3.48 eagle LW crank 48lbs over the stock 58lbs, 500GRAM Eagle LW rods, And LW weisco Pistons. I also have a 12 lb flywheel, Aluminum diveshaft, and underdrives. You can only imagine how fast mine revs!! I can push the pedal down then right back up as soon as its wot and be at 6000. Its amazing on the street and in 3rd and 4th gear.