Piston Options

Randall12v

Randall12v

...
Joined
Nov 6, 2006
Messages
2,396
ok, lets discuss the topic of pistons for an engine build. I know this is kind of broad..just trying to get ideas, and I'm thinking out loud.

Say one has a 12v with 24v head or just a p-pumped 24v.

What pistons would you run and why?

What compression ratio would be ideal for drag racing?

Are CR pistons possible to run? Would it work? Benefits?

Thanks. :Cheer:
 
Big12Valve said:
ok, lets discuss the topic of pistons for an engine build. I know this is kind of broad..just trying to get ideas, and I'm thinking out loud.

Say one has a 12v with 24v head or just a p-pumped 24v.

What pistons would you run and why?

What compression ratio would be ideal for drag racing?

Are CR pistons possible to run? Would it work? Benefits?

Thanks. :Cheer:
Click to expand...



Also if the CR pistons are the way to go 03-07 are there differences in pistons year to year & which would be the preferred year to run with?
 
piston choice would depend on alot of factors. What hp level are you shooting for? what kind of rpm are you going to turn?
 
well i know that the QSB 480HP Marine pistons in the CR are the way to go.double heat treated, they see 60psi of boost on the water at 60 to 100 percent power all day, but you have to match the injector tip to the pistons, the 480HP QSB pistons have the same bowl design as the 03-04 CR.
 
GOT-Torque said:
piston choice would depend on alot of factors. What hp level are you shooting for? what kind of rpm are you going to turn?
Click to expand...

850-950hp at wheels, rpms, well I'm not turning alot at end of trap, lets say around 4k give or take some. may be going to manual vb, not sure yet.
 
Boostediesel said:
well i know that the QSB 480HP Marine pistons in the CR are the way to go.double heat treated, they see 60psi of boost on the water at 60 to 100 percent power all day, but you have to match the injector tip to the pistons, the 480HP QSB pistons have the same bowl design as the 03-04 CR.
Click to expand...

:pop: interesting...
 
I would use QSB pistion, I know of a buddy that p pumping his 24v and he's putting 03-04 CR pistons in his.
 
jordanjames81 said:
I would use QSB pistion, I know of a buddy that p pumping his 24v and he's putting 03-04 CR pistons in his.
Click to expand...

is there a difference between the 03-04 automotive vs. marine piston? heat treated? I'm just thinking out loud, and thats what was mentioned up top too. just the bowl is the same, correct?
 
What about the Mahle Monotherm steel pistons? Ive heard good about and I think some one on here is running them. Or get some marine ones and coat them.
 
Compression ratio is going to depend on what the charger setup will be.
 
So i've been reading on some other threads about pistons and it seems if you were gonna stick with a 12v head that the 1st gen non I/C or the 370 Marine pistons seem to be what is recommended for a build. So like stated in the original post say you were switch to a 24v head on the 12v or built a ppumped 24v (with the intention of moving more air) which would center the injectors what would be recommended in a race application? Coated VP or CR pistons, CR Marine piston (as listed above) or something aftermarket such as Mahle or Arias when comparing things like strength/durability, option (enough material) for cutting valve reliefs if needed and ofcourse cost? This would be with the a turbo set up like Big12Valve listed, a 900+ HP goal possibly some *nx*
 
Big12Valve said:
is there a difference between the 03-04 automotive vs. marine piston? heat treated? I'm just thinking out loud, and thats what was mentioned up top too. just the bowl is the same, correct?
Click to expand...

the difference between the automotive and marine pistons, is the marine pistons are double heat treated, also those pistons have been engineered to see 100% power all day long. i am not saying anything bad about the standard CR pistons, but as far as a better engineered piston i would say the marine piston outshine's the regular production piston. the QSB pistons have the same bowl design as the 03-04 piston, so you would have to use that injector tip.
 
Boostediesel said:
the difference between the automotive and marine pistons, is the marine pistons are double heat treated, also those pistons have been engineered to see 100% power all day long. i am not saying anything bad about the standard CR pistons, but as far as a better engineered piston i would say the marine piston outshine's the regular production piston. the QSB pistons have the same bowl design as the 03-04 piston, so you would have to use that injector tip.
Click to expand...

What's the price difference between these marine pistons and and aftermarket? Could the marine pistons be cut for valve reliefs safely if needed?
 
yes they can be cut if you have a good machine shop, for a price on a set call MuMau diesel or pm snedge on here
 
Got Twins??? said:
So i've been reading on some other threads about pistons and it seems if you were gonna stick with a 12v head that the 1st gen non I/C or the 370 Marine pistons seem to be what is recommended for a build. So like stated in the original post say you were switch to a 24v head on the 12v or built a ppumped 24v (with the intention of moving more air) which would center the injectors what would be recommended in a race application? Coated VP or CR pistons, CR Marine piston (as listed above) or something aftermarket such as Mahle or Arias when comparing things like strength/durability, option (enough material) for cutting valve reliefs if needed and ofcourse cost? This would be with the a turbo set up like Big12Valve listed, a 900+ HP goal possibly some *nx*
Click to expand...

well if we plan it out right, my 12v block will have that 24v head on it.

Lets just say 03-04 CR marine pistons, just for conversation piece.

what would be needed then? marine spray pattern on the injector tips? I'm guessing you would need new nozzles cut to spec, correct? Would this even work for a vp44 injector?
 
You must log in or register to reply here.
Back
Top