How much to mill LT1 Trick Flow Heads for higher compression?
Thread Starter
East bound and down...
Joined: Dec 2004
Posts: 987
Likes: 3
From: Jonesboro Arkansas
How much to mill LT1 Trick Flow Heads for higher compression?
I have a set of trick flow heads that I came into pretty cheap. I am not planning on forced induction so I was thinking of having the heads milled. (If I do anything at all later on I might do a 100 shot of nitrous.) These are beong bolted to a stock LT1 short block.
I know with a stock gasket the trick flows will drop you close to 10 : 1. I was thinking I would try to bump them back up in the range of 10.5 - 10.8 to 1. I will be using a head gasket that has a .039 in. Compressed Thickness.
Now for the real question, how much will have to be milled in order to bump up the compression a half a point or so?
I know with a stock gasket the trick flows will drop you close to 10 : 1. I was thinking I would try to bump them back up in the range of 10.5 - 10.8 to 1. I will be using a head gasket that has a .039 in. Compressed Thickness.
Now for the real question, how much will have to be milled in order to bump up the compression a half a point or so?
Safety Car
Joined: Sep 2003
Posts: 3,692
Likes: 5
From: Hayward CA
Shoot Lloyd Elliot an email - www.eportworks.com
He has experience with those heads and can give you accurate info to meet your needs.
He has experience with those heads and can give you accurate info to meet your needs.
Pro
Joined: Apr 2005
Posts: 590
Likes: 0
From: Boynton Beach, FL
Calculate how much you have to remove from the head to get the compression ratio you want. Any machine shop will know how much to remove from the intake manifold sides and the front and rear lower surfaces. Be careful if you have headers with a slip on Y tube. Milling the heads brings the headers closer together and makes it hard to get the header Y pipe back on. Ask me how I know? 
Larry
Larry
Thread Starter
East bound and down...
Joined: Dec 2004
Posts: 987
Likes: 3
From: Jonesboro Arkansas
Shoot Lloyd Elliot an email - www.eportworks.com
He has experience with those heads and can give you accurate info to meet your needs.
He has experience with those heads and can give you accurate info to meet your needs.
Thread Starter
East bound and down...
Joined: Dec 2004
Posts: 987
Likes: 3
From: Jonesboro Arkansas
Calculate how much you have to remove from the head to get the compression ratio you want. Any machine shop will know how much to remove from the intake manifold sides and the front and rear lower surfaces. Be careful if you have headers with a slip on Y tube. Milling the heads brings the headers closer together and makes it hard to get the header Y pipe back on. Ask me how I know?
Larry
Larry
