18:1 pistons needed

[NOEL_ISAAC]

i am in the process of getting things together to build a 300 horse 6.5. i know of 2 manufacturers of the 18-1 6.5 piston, Peninsular and Mahler. However, i cant find a good place to buy the Mahler pistons, or even find out how much they are going to cost me. i know the Peninsular ones are a hair over $100 a piece.

Also, any one heard of boring a 6.2 out to the 18-1 piston size and slipping them in? i read a report before i deployed on a few folks doing this, but cant seem to find that either.

thanks guys, noel

[C.K. Piquup]

Yes,the 6.2 block can be bored for 6.5 pistons.Buy the pistons 1st,ofcourse.What brand are Kennedy Diesel selling?They are full height/dished,that`s what you should be looking for.

[john8662]

Also another important note, not ALL 6.2's can be bored to the size you're talking about. Only the late model 6.2's with a block cast number ending in "599" can be bored out to the dimensions of a 6.5. The early blocks don't have that much meat.

[Tough Guy]

Check out the Diesel Depot, I helped a friend rebuild a 6.5 last year, and the pistons that DD carried then were the same pistons as Peninsular has....IIRC they were $985.00 including rings, and ceramic coated tops.

Cheers

[C.K. Piquup]

Thanks for the correction LED emblem person(ha-ha).I don`t know what year truck do you have?I think the 599s went in `88-later 6.2s.

[david]

Noel,
027011ha-030 19 to 1 mahle part# .030 over size.
David :D :D :D tongue.gif

[odee]

what year did they switch over to the 599 block? I'm going after another core engine today an it is a black colored block with the 660 casting number that supposidly came out of a P-30 van. Are just the 599 block capable of taking the large overbore? What about the early red engines just better metal content in those block or thicker also?

[Kennedy]

Whenever possible, stick to +.020" to retain maximum cylinder wall thickness.

[C.K. Piquup]

The red blocks(what#s are they)are hi-nickle,then to say them $ and cost us $$$$$,they lowered nickle content.Bad move.They didn`t want to risk their fruitful contract w/DOD,so they gave them the nickle(US govt:tough customer/willing to pay...with our money).No,only the 599s are borable.You can get 19:1 marine pistons for 6.2.