5.9 Magnum pistons

[pistolpete1934]

Hey all. Doing a rebuild on my 5.9 and need a little info. The stock piston have advertised weight of 470 grams which I am trying to duplicate in an aftermarket forged piston or get fairly close. Is anybody running a light weight forged piston similar in weight to the stock piston? I am keeping stock stroke with prob 20 or 30 overbore. If i cant find what is anybodies experience with speedpro flat top hyper pistons? I want to run the serpentine belt system and therefore need the external balanced harmonic balanced with attached surp pulley. Maybe i will have to internal balance if piston weights are hugely different but dont know what i would use for balanced/surp pulley... Thanx

 

[ChargedDart75]

If you have it balance, just run a 5.2 Magnum balancer and flex plate/flywheel. Have you checked out piston weight on the manufacturer websites?

 

[pistolpete1934]

If you have it balance, just run a 5.2 Magnum balancer and flex plate/flywheel. Have you checked out piston weight on the manufacturer websites?

Yes, the lightest(and most expensive) are around 510 grams. I contacted Wiseco a few days ago but have not heard back.