331 supercharged

[simonjrwinter]

Going to be building my next engine this year, I've got a really nice 302 block, a scat 9000 331 crank, and will get some H-beam rods for strength, and dished pistons to keep the c/r down.
I guess it'd be advisable to get a girdle for the bottom end just to be safe. any other advice would be appreciated, what oil pump should I get? High pressure or High volume?

[MJN]

It's oil volume that keeps an engine alive not oil pressure. Unless you're racing (a lot) a blueprinted stock pump will work just fine.

With a supercharged engine pay attention to your piston and piston ring choice. You will probably want the ring pack to be slightly lower on the piston and the end gaps will need to be a little larger than for a N/A engine. Anti scuff grooves in the piston above the top ring are also a good idea. I would call the piston manufacturer directly. I used custom Probe pistons in mine with their specific ring placement and ring pack with end gaps they recommended.

Setting your pistons to zero deck or even slightly (0.005") above will increase squish and help reduce tendency for detonation.

Aluminum heads are much better for heat transfer and reducing detonation.

You will want high quality valves and seats in the heads to hold up under the increased combustion pressure.

A good stud girdle and high quality main studs are always a great idea on any engine and even more important on a high output motor. You maybe surprised to learn that a supercharged motor is actually a lot easier on the bottom end than a high rpm motor. Keep it below 6000rpm and you'll be fine.