[mao66]

Can you guy's please tell me how to tell a forged piston 5.0 from a cast piston 5.0? Is there a different casting number a mustang or t-bird compared to a ltd or townie. I want to buy a roller motor from a core supply so I can't tell what carthey came from. Thanks alot.

 

[thekingofazle]

Really, the best way to tell one is just to look at it.

A cast piston will have a roughish surface on the interior of the piston, and can have reliefs in the upper wrist pin area - a forged piston is fairly straight up and down inside the piston because its difficult to forge sideways. The surface of a forged piston will be much smoother and have a grain structure that follows the contours of the piston.

 

[mao66]

Thanks, King. I just bought a complete 5.0 HO out of a '92 cougar from Kennedale junkyard. From all the searching I have done on this site This was the last year the factory offered forged pistons befor they went to hypers. The only thing is the upper intake is like a '94-'95. Some earlier post said these were the shortest uppers that were offered, so hopefully it will help on the bottom end torque since this is going in a daily driver. I paid $900 for the engine, harness, ecu, and tranny. I hope this is a good deal considering what they have on EBay and what not plus they will pull it all out and have it ready to just pick up.