yeahsmitty

Morning!

I am building a LQ4 and plan on installing a turbo down the road but for now I'm keeping it N/A.

I am going to be buying forged pistons soon and wanted some help on selection. The only reason I'm asking is because i have 243 heads. Should i buy a dished piston and run the 243 heads when i turbo or should i run the 243 heads for now(N/A) and switch back to the 6.0 heads when i turbo?

I am asking this for compression sake.

Thanks!

kingtal0n

iTrader: (1)

If you have the engine N/A I recommend using a stock cast piston engine. No reason to wear out forged slugs on a motor that doesn't require them. Build the forged engine on the side and keep it for when you actually need it. the cost of a spare engine block to build is negligible compared to the cost of parts/assembly, and wear/tear.

yeahsmitty

I am actually in the middle of building the engine. Putting the OEM pistons wont work because i had to go 30 over.

JoeNova

Heads will depend on what pistons you go with. If you get flat tops, 243s and a turbo won't mix well unless you stay on low boost.

If you're doing pistons, you might as well do rods. They're cheaper than pistons are more often the weak point.

simple

iTrader: (8)

Gen4 SBE 5.3?

truckdoug

iTrader: (25)

what are your end power goals?

you can run high static CR and boost and be okay if you're not shooting for the moon

tblentrprz

Compression will depend on fuel choice and then to some degree power goal.

kingtal0n

iTrader: (1)

Sorry, thats not what I meant,

I am not saying put stock pistons in the engine you are building,

I am saying put a stock engine in the vehicle until you have everything you need to take advantage of the built engine with forged pistons you are building.

The cost of the build is $8k+
The cost of a stock engine is $500~ insignificant compared to the cost of the build

Sort the car out with the OEM engine then swap in the big one when ready to pay for FI