Nyvark627

Say for a boosted 6.0 iron block, complete forged internals, arp head/ main studs and pinned main caps. Making 1000-1300fwhp. 18-26 pounds of boost.
At these power levels, at what point (if any) would you find it necessary to:
Upgrade the mains to a set of billet mains?
O-ring the block?
Put a main girdle on?

KCS

iTrader: (20)

At that power level, I'd get an aftermarket block. I've seen a lot of the stock blocks crack between the cylinders after 1000whp.

Nyvark627

Would it matter if the block was filled with hard blok?

KCS

iTrader: (20)

Yeah, it would help.

pantera_efi

iTrader: (1)

Hi, you will need Steel Billet Main Caps with ARP.
I would Sonic the block bores FIRST.
No Girdle.

I would use China head studs as they will MATCH the Steel/AL head BETTER than ARP.
I would use Felpro 1041 HG
I would use the GM 58x Crankshaft Target Wheel.
I would fit my IGN-1A coil.
I would fit a .990" pin with DLC.
I would set the Valve Spring SEAT Pressure@200
I would fit a Solid Roller.
I would Groove the Rod toward the piston, the slots on both sides of the rod.
I would fit an Avon Gear, single, Timing Chain with Dampener.
I would fit Autolite 3912x NASCAR Race Spark plugs.
I would "over" balance 2%
I would use a Ti-Nitrate STEEL Top Ring.

Lance

Nyvark627

What about everyones opinions on putting orings around the cylinders on the block/ head? think just a good gasket is enough?

Exidous

iTrader: (11)

At that power you are more worried about lifting the head. An o-ring won't help too much. Many are on a 6 bolt block at that point.

The LSX block is more closed than the normal GM blocks. It or another aftermarket really are the way to go above 1000whp.