This is what TurboBerserker told me.
-.008 piston DH for LQ9

 

Do you think that would be the same for the LG4 since they have different bottom ends??

And does he know if the pistons have adish or dome to them or are they flat top.

Thanks

 

The LQ9 are flat vs the LQ4 which have a dish.

I'm not positive but I would think they would be about the same because the LQ4 pistons are only lower in the center.

 

I thought I read somewhere that the dish on the 4.8, 5.3, and LQ4 6.0 all had a dish of -2cc. but I would really rather have someone tell me for sure.

 

7cc dish volume for LQ4 pistons.

 

4.8l's are flat top.

 

All mechanical things aside I think this could help you out. Not much information where I looked but there may be somewhere else. I've seen it advertised this way in GMHTP magazine.

Can the Snow Performance Boost Cooler® be applied to naturally aspirated and nitrous engines?
1.Naturally aspirated/high compression engines:
In this application, water/methanol injection allows the use of pump fuel in all but the most extreme situations which effects tremendous cost savings as well as horsepower increases due to air density increase and realized timing potential. The system is activated by a throttle switch so that injection takes place only during high engine loads when needed.

2. NOS engines: With NOS, water/methanol injection allows the use of full timing even with large (250HP+) quantities. Injection is controlled by the same means that controls NOS injection.

3. Naturally aspirated/stock compression: With naturally aspirated engines with less than 10:1 compression, water/methanol is used typically in warm climates to get the intake temps back to 60�f. Benefits include: 10-15 HP increases from air density increases and full timing, Increased gas mileage, and carbon free combustion chambers. Activation is by a throttle switch adjusted for onset engine load. With this application, the nozzle is sized so that no more than 10% of total fuel consumption at peak flywheel HP is injected.

 

Sorry is it +7cc or -7cc?

I guess I need to buy a LS1 engine builder book.

 

for the calculator i posted its + and i think it usually is a + number so that would mean +7cc dish.

 

Rod length on a LQ4 is it 6.125" or 6.098"?