Dynamic Compression Ratio CHART
Instructor
Joined: Jun 2019
Posts: 189
Likes: 22
Good advice, will definitely seek their feedback. I'm going to measure PTV prior to having the heads milled, and flycut if necessary. I believe it was you (or maybe Spin) that mentioned in another thread that TSP, who will be doing my head work, sinks the valves 0.010 if I remember correctly.
I'll measure PTV, and then do the math on how much that clearance would decrease with milling/thinner gasket without sinking the valves. That way, if they are sunk a little, I'll have that much extra room.
I'll measure PTV, and then do the math on how much that clearance would decrease with milling/thinner gasket without sinking the valves. That way, if they are sunk a little, I'll have that much extra room.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,684
From: Southeast TX
And be sure and keep that thinner head gasket in the mix. It does more than just increase the static CR. Here's an interesting article for those not convinced of the thinner head gasket's valvue in an LS3.
Quench: Unlocking Performance Squished Between the Piston and Head (enginelabs.com)
Quench: Unlocking Performance Squished Between the Piston and Head (enginelabs.com)
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
If you are using stock heads that are not ported, with thinner gaskets, use a dremel to knock down any sharp edges such as the metal surrounding the combustion chamber.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,684
From: Southeast TX
Instructor
Joined: Jun 2019
Posts: 189
Likes: 22
Agreed. So much knowledge shared. I feel like I need to buy Spin a beer lol
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
I hope you are all doing well.
