Engine/Transmission (1994 - 1998) Marine Pistons

[CBeeman]

I am doing a 24 valve P-pump build up. What would be the best piston to use? A marine piston or a common rail piston? I am looking for 600 horses or more. And it still needs to start ok on its own when its cold out.

Does anyone know the marine piston part number?

 

[Vaughn MacKenzie]

Diesel Freak on NW Bombers used ISB 300 pistons on his buildup and they were pretty nice units. Since they drop compression you'd probably want the stock thickness head gasket unless you're going more radical. More info here:

Project ETX - BOMBER Board

 

[CBeeman]

Any idea what the part number is on those pistons?

 

[pwerwagn]

Joe D used marine pistons in his last motor and said he preferred the 215 bowl over the Marines.



--Jeff

 

[ATofflemire]

im running mahle pistons from piers, they have the marine style bowl. i think they have stock compression ratio. and the price is every reasonably. i think i paid 300 for the set. im running 500hp to mine and the guy at piers is running around 800hp

 

[Jim Fulmer]

I would call here Home and talk to Piers or Harry and see what they recommend.



Talked to Harry the other day about this very subject on a motor re-build I'm about to do.



FYI: Don't get Piers and PDR mixed up they are not the same place.



Jim

 

[HoleshotHolset]

He's building a P-pump'd ISB... not a 12-valve.



I'd use CR pistons - quite a few folks have had good luck with them... in both ISBs and *gasp* 12-valves.



Beers,



Matt

 

[Joseph Donnelly]

The reason to use the 215 bowl in a 12 valve build is compression. you can't get any valve to piston clearance and over about 15. 7 compression with the 370 marine bowl in the 12 valve, and that is low enough for a trail of white smoke at every cold start. I found the 215 bowl with the thick 3283339 head gasket at 16. 4 compression was better on the street. Now in a 24 valve engine, you need a centered bowl, so neither of the above psitons (215, 370) is appropriate.