if you get a forged piston like a wiseco do they add power? i have one and would never get a different kind but i was just wondering
do forged pistons add power
- Thread starter roadkill
- Start date
The simple answer is no. A piston captures the rapidly expanding combustion byproducts and forces the crankshaft downward to complete the stroke and put the power out the primary gear and into the clutch.
A forged piston is no more effecient at that job than a cast piston.
There are a few differences though. The cast piston doesn't distribute heat towards its outer edges as efficiently because of the orientation of the metal. That means you can build an engine with more power (hotter mixture and more timing advance) and the forged piston will "take it" better than a cast piston will. Also, when a cast piston gets too much clearance or siezes due to lack of lubrication they disintegrate. A forged piston will gaul the cylinder wall or break the piston skirt off clean instead of putting little pieces of aluminum into your crank bearings
A forged piston is no more effecient at that job than a cast piston.
There are a few differences though. The cast piston doesn't distribute heat towards its outer edges as efficiently because of the orientation of the metal. That means you can build an engine with more power (hotter mixture and more timing advance) and the forged piston will "take it" better than a cast piston will. Also, when a cast piston gets too much clearance or siezes due to lack of lubrication they disintegrate. A forged piston will gaul the cylinder wall or break the piston skirt off clean instead of putting little pieces of aluminum into your crank bearings
it does not add power it only adds reliability to the piston being forged... the only piston ive seen that adds even a little power is the super stock piston from vitos but its not that much
The vito's super stock piston technically doesn't add power...
It has a 1mm pie cut across the front of it where the exhaust port is. It changes the port timing to allow a longer blowdown period changing the "porting" of the engine to allow more power. This is the same process porters use, the super stock piston just does it "bolt on".
It has a 1mm pie cut across the front of it where the exhaust port is. It changes the port timing to allow a longer blowdown period changing the "porting" of the engine to allow more power. This is the same process porters use, the super stock piston just does it "bolt on".
No. But certain pistons screw up port timing and make less power. ****cough*****cough**** vitos******
But a forged piston is lighter and less rotating mass is allways a good thing..
But a forged piston is lighter and less rotating mass is allways a good thing..
Hmmm. Now I want to get out a scale. A forged piston should be heavier than a comparable cast piston, due to higher density. Of course, a forged piston being stronger can allow for less total volume of material used. Anyone got a cast and a forged piston laying around that they can throw on a sensitive (gram?) scale?
the mass is close in weight to one another but a forged piston is more precise it has closer tolerances more balanced weight ,it is more durable and less prone to crack shatter due to slap with less internal fractures ,if the piston is modifed by means of adding a boost port or changing the window configuration a forged is still most durable,i cant think of a time or build when id prefer a cast over a forged.as far as added power by running a prox ,vitos, namura or vertex your not going to go any faster or make any more power if your piston dropped its skirt and is laying in your cases becuase it fell apart at high rpms 
not much of a difference witht these tiny pistons but big difference in the automotive field. Forged is heavier, stronger, and expencive. Cast is lighter, weaker, and less expensive
