Did a quick search, but couldnt come up on anything about the differences from the N/a and Turbo blocks. I know the turbo has lower compression ratio.

What I'm particularly interested in are differences in the block and heads.
I believe i read somewhere the turbo has some sort of oil cooling for the pistons, and that the valves vary a little, the turbos being sodium filled?

If theres already been a thread for this started, sorry for being redundant, Im merely a forum noob

 

As far as I know:

- Compression Ratio (Turbo/NA): 8.5:1/10.5:1

- Displacement: 2.3L/2.4L (2.5L).

- Oil Cooling System: Radiator built-in oil cooler (not sure about the NA, and I do not believe there is a special piston cooling oil system for turbo).

- Exhaust Valve: Not sure if the turbo version comes with sodium-filled valve, I assume it does.

- Certain NA engines come with 10 valves (x2 each cyl).

See what others have to say.


JPN

 

non turbo does NOT have sodium filled valves. Also, there are cooling jets that spray the pistons on the turbo model. Turbo also has the oil cooler and trans cooler.