[Glen Rogowski]

need help bad

I am looking to purchase a used set of pistons with a stamped # L2347P30 that came out of a chevy 402 big block I need to know what thy are. please help

THANKS :sweat:

 

[cobalt327]

I will resist asking why. I believe they're forged, pressed pin, std. ring width, don't know what volume.

As a FYI, titling your post "need help", etc. ain't good for getting answers, also posting in the Lounge/Introduce Yourself isn't the hot tip either.

Try something like "Piston ID Help", posted in the Engine section, next time- the mods will prob. move this post, so you don't need to re post it.

Good luck.

 

[cranky1]

I can find L2346F and L2348F but no 47P.....the 48F is for a Chevy but that's all I know.....

 

[poncho62]

moved and retitled

 

[Glen Rogowski]

Still need some help

 

[cobalt327]

Still need some help

EXACTLY what do you want to know?

 

[techinspector1]

They're 0.030"-over, forged.

 

[Glen Rogowski]

I WONT TO FIGURE OUT COMPRESSION If I CAN. THE ONLY INFO THE GUY THAT'S SELLING THE PISTON CAN TELL ME IS THAT THY CAME OUT 0F A 402 AND THE THAT IS STAMPED 2347F30 CLOSED CHAMBER DOME AND .100 HIGHT ON THE DOME.

 

[cobalt327]

I would calculate compression ratio using the piston dome volume of about 15cc.

A TRW L2399F30 piston w/a 0.095" dome has a dome volume of 13.8cc. and 9.71:1 CR using 107cc chamber heads. The 2399's are open chamber pistons.

A L2349F closed chamber piston has a .265" dome, extrapolated to a 0.100 dome, this becomes about 11.5cc, but because of how the dome is shaped (wider at the bottom) this figure is low- which will put you back in the 15cc range, IMO.