98Raptor

Can someone help me calculate the CR for my new engine?

This is what I got.

Hand ported 5.3 Heads with LS6 sodium filled valves (flowed 291 int and 226 ext) These have not been milled at all.

6.0 Liter stock short block. I think it is the LQ9. It has dished pistons. Again the sort block is stock.

GM metal 6.0 liter gaskets.

Not sure if you need anything else.

jrp

iTrader: (16)

dished pistons = lq4

with that said i come up with ~10.3CR

Unaffliated Racing

iTrader: (15)

Yeah I came up with about 10.29....close enough...lol

98Raptor

How did you guys come up with that?

jrp

iTrader: (16)

4.00" bore
3.622" stroke
~62cc chamber
.060 gasket
4.100" gasket bore
-.008 deck height
6.6cc dish

all into a CR calculator

98Raptor

Where did you get this info?

jrp

iTrader: (16)

deck height is gm spec and i learned the dish volume from the truck guys. once thought of swapping an 6.0 into my car myself

98Raptor

Enter Piston Deck Clearance Negative If ABOVE Deck (Use '-') : -.008

Is this correct then? Just wanted to make sure it really is ABOVE the Deck.

Sorry if I sound dumb on this issue. First time for everything.

jrp

iTrader: (16)

yes, ls1 pistons are above the deck. gm lists -.008 but it can range from -.002 to .010 out the hole