what the max amount that can be safely milled off the deck of a 6.0 block. I need to go .024 thou.

thanks

 

I'm not sure what the limit is but I would like to follow along for curiosity sake. Can you tell me why you want to take that much off the deck?

 

Also. I do have a bit of an "educated guess" for your answer.

If using totally stock, unmilled heads, I would think .024 would be just fine. People mill .030 off heads all the time and never have issues with things like intakes sealing, or valvetrain geometry, so I think those types of issues wouldn't be a big deal.

The thickness of the gasket surface would be the point of worry for me.

 

The heads will be fine. They are aftermarket and have a .500 deck. Quench will be .04 thou. like I stated this is for the block limits.

 

You have around 40 thousandths quench with stock deck. How are you going to have 40 left if you take 24 off the block?

If you can take 24 of the block the pistons will stick out about 30-35 then you have to worry about only having like 10 quench which isn't enough. Someone else will have to chime in if it's okay to stick the pistons out that far. I'm thinking not, but have nothing to back it up.

 

 

Ah, gotcha. Sorry I don't know the max amount you can remove. Most people that ask questions don't have as much figured out as you do so I chimed in, i'll back away slowly now and let someone else help.

 

This is a long rod setup, that’s what it would take to be zero deck. This is a forced induction setup so that’s why I asked.

 

There's not gonna be a lot of members here that will know. Off the top of my head KCS is is probably your best bet if you wanna message him. I say you're good. But that's a guess.

Search member KCS and send him a message and see what he says or if he can send you to the right person.

Thompson motorsports or texas speed may know as well.

 

I was saying from the standpoint of intakes sealing you could take that much off, I understand that you are wanting to mill the block and not the head. Since regardless of whether you remove material from the block or the head, its going to move the intake ports down the 0.024-- and they will still seal--I figured the intake sealing and valvetrain geomety point I was trying to make was clear. Sorry if you thought I meant cutting the head, I did not.
Attached is a photo of an LS9 cutaway. I circled 3 areas in red that you can see the deck surface thickness. This is what I referred to earlier. Cutting this too thin is what I would worry about. I do not have experience with decking the block this much, so I cannot speak from experience, but I would consider at what point cutting this surface too thin would be troublesome with deflection, gasket sealing, etc. You may be fine at .024, you may not. I cannot tell you for sure, But I would consider it and check.

 

From my experience; boosted engines are not as sensitive to quench clearance like NA applications. I can tell you that keeping both the block deck and head deck as thick as possible will help with gasket sealing. Specifically since only four bolts around each cylinder. There are so many different thicknesses of head gaskets available and should be used to set your desired quench.