compression calculator

**383ls6** · 07-02-2010, 04:18 PM

can heads be milled slightly and not have intake sealing problems? just different pushrod length?is .020 too much?

**mark21742** · 07-06-2010, 02:22 AM

.020" mill will be fine...I milled .040" off of mine

**383ls6** · 07-07-2010, 04:11 PM

actually the heads i'm looking at have.055 milled. seems like quite a bit

**mark21742** · 07-07-2010, 06:21 PM

What heads are they? I've seen them milled over .060" before, but that is alot

**ls1camino** · 07-08-2010, 05:58 AM

I see flycutting in your future if you're getting a cam as well.

**shady milkman** · 07-08-2010, 07:16 AM

Originally Posted by ls1camino

I see flycutting in your future if you're getting a cam as well.

x2 .

**383ls6** · 07-08-2010, 03:03 PM

Originally Posted by ls1camino

I see flycutting in your future if you're getting a cam as well.

flycutting?

**383ls6** · 07-08-2010, 03:18 PM

Originally Posted by mark21742

What heads are they? I've seen them milled over .060" before, but that is alot

ok here is the problem. this is my first gen 3. On the advice of a friend when i ordered my block and rotating assy. I got -9cc dished pistons to stay around 11:1, 11.5:1. some compression calculators put me at 10:1 and some at 12:1. Before I shell out more cash I want to make sure of what I'm doing before i do it. The car is a DD. So this is what Ive got ....
3.905 bore
4.00 stroke
-9cc pistons
6.125" rods

**mark21742** · 07-08-2010, 05:35 PM

Do you know how many cc's the heads are now?

60cc heads I get 11.06:1
58cc I get 11.33

Try wallaceracingcalculators

**383ls6** · 07-09-2010, 02:46 AM

[QUOTE=mark21742;2380858]Do you know how many cc's the heads are now?

60cc was planning on going with gmpp 88958622. wish i had done more research before ordering those -9cc