Same as OP....I am searching for aftermarket high compression (10:1 ish), STD bore pistons to use in my 2001 Magnum 360. I do not want to have to have the assembly balanced.
Street car only and around 375HP/400TQ. 1200-5500 RPM.
Looking for some real world (i've used these and it works) information to Rumbles original question. I see that he decided to go stroker and I am finding conflicting slug weights out there. This could be due to different bore diameters. I would also like to know what the +/- percentage or weight that is still acceptable without rebalance.
Here is what I have found in the forums. Sorry for the format....
"My 360 Magnum info: Pin 135 gr & Piston 469 gr = 604 gr total
KB107: Pin 118 gr & Piston 492 gr = 610 gr total
H655CP stock Magnum replacement piston: Pin 128 & piston 488 = 628 gr total (Weighed by 70aarcuda;"
70aarcuda?? "Just took a factory stock one apart, standard 4" bore, and weighed it. This one, for the record, is 1999 model year 5.9 Magnum. Piston weighed 469 grams, pin was 135 grams, and ring set was 39 grams. I don't have any 2003 model year parts to test for the original question, but this should get us close enough to be dangerous. I plan to use the Icon forged pistons, but don't have them yet and don't know the weight of the ring set for them."
From Car Craft Magnum build shown above .."He used ICON 741 530 gram is the piston weight...pin weight another 125 grams or so." No balance needed?!?!?!
From ICON website: IC741.STD 530g/118g
From KB website: KB107STD 524g/132g
From what I can tell from Federal Mogul website, Sealed Power/Silvolite only manufactures 9.0:1 pistons for Magnum.
Have I missed any other brands?
Thanks!!!!
