Decking cylinder heads

charonblk07 said:

There are several hemi builders that do it and if you don't want to go as far as doing the Eagle head swap then it's a viable alternative. While you're at it doing a port job is always a good idea. I had Inertia Motorsports do the heads on my '07 before I did the Eagle head swap.

Click to expand...

Ajwalk2008 said:

Eagle head swap? First I've heard of this


Sent from my iPhone using Tapatalk

Click to expand...

quietpeen said:

Sorry for the stupid question....what is decking cylinder heads?

Click to expand...

R/T_Fire said:

Basically it levels the head to the block deck and shaves just a little off lessening the combustion chamber ever so slightly upping the compression ration ever so slightly.

Aside from a perfectly level surface job this can also be done with head gaskets. We would do similar things with the head gaskets on the top fuel cars depending on track conditions and elevation to raise or lower the comp ratio boost or retard performance so to say

Click to expand...

Ajwalk2008 said:

Has anyone on here done this? Been thinking about .003 off the heads to up the compression a little. Would it be worth it? What would the compression be?


Sent from my iPhone using Tapatalk

Click to expand...

R/T_Fire said:

Swapping the 09 up heads onto the earlier hemi, Here is some reading that will better explain it than I... That and I'm too lazy to type it all

Inside The G3 Hemi Cylinder Head - Hot Rod Network

Click to expand...

usaf2006 said:

Wow that's some good numbers for the head swap...
Does it require a custom tune?

Click to expand...

usaf2006 said:

There's a local place here that will do it for $125. Not bad for a few ponies.

Click to expand...

Ajwalk2008 said:

Has anyone on here done this? Been thinking about .003 off the heads to up the compression a little. Would it be worth it? What would the compression be?


Sent from my iPhone using Tapatalk

Click to expand...

RonJon '06 said:

I was reading on the LX Forum that milling the heads .030 would take your CR from 9.6:1 to about 10.3:1 so milling them .003 would get you less than 9.7:1. When I had my heads resurfaced at the shop I think they shaved off .003-.005.

Click to expand...

Ajwalk2008 said:

So basically it wouldn't be worth it doing .003. If you did .030 you would have to do that much shorter on the push rods right?


Sent from my iPhone using Tapatalk

Click to expand...