thunder550

iTrader: (70)

Are these just estimates or what? I have put my info into 3 or 4 different calcs and gotten different answers ranging from 9.1 to 9.4

Diamond racing's calculator gives me 9.3:1
http://www.diamondracing.net/cocalc.htm

This one gives me 9.4:1
http://www.csgnetwork.com/compcalc.html

The one included with Desktop Dyno gives me 9.16:1

I'm tempted to believe Diamond's most because it considers many more factors than the other, but what's the deal? A range of .3 is a big difference.

4.03" bore
4.00" stroke
6.125" rods
4.125" head gasket diameter
.04" thickness
9.23" main bore to deck (stock for the 6.0 iron block)
.3" from top of piston to first ring
64cc heads
28cc piston dish
-.008" deck clearance (I've heard between -.006 and -.010, so I just went halfway)

1slow01Z71

iTrader: (36)

My pistons were .008 out of the hole, most LSx motors are out of the hole out TDC.

TurboGibbs

iTrader: (6)

Well giving the exact specs you have there. I come up with 9.43:1 doing it the old fashioned way with the piston .008" out of the hole.

1slow01Z71

iTrader: (36)

why 85s instead of 96s they are the same price

TurboGibbs

iTrader: (6)

1slow01Z71

iTrader: (36)

injectors

thunder550

iTrader: (70)

Won't idle/low pulse tuning be easier with the smaller ones?

thunder550

iTrader: (70)

The number I gave was actually for piston out of the hole

What's the old fashioned way? Just crunch the numbers yourself?

TurboGibbs

iTrader: (6)

Hell, that is the way I figured it ( .008" out of the hole). I don't know what I was thinking.
yeah, good old fashioned math but I usually use an online calculator to check my work.

1slow01Z71

iTrader: (36)

According to Jeff there isnt any difference, somethin tells me once you get to the 80s there aint much difference going to the 90s. I just cant see going smaller when the larger ones are the same price and I know I wont ever run out of injector.