LM7 Turbo Guys: Talk to me about 10:1, slight mill, thinner headgaskets
So I've got a bone stock LM7 motor and the heads are coming tomorrow off for lifters and cam in preparation for the turbo. I plan to have a valve job and guides done on them at the same time, but I'm wondering about doing a mill or using a thinner headgasket to bring compression up to 10:1. Has anyone done this and what was your method?
|
Can't do it with a headgasket, you'd need to mill the heads a lot to make a .5 compression increase unless you had 863's. What head do you have on it now?
|
Heads are 862's. A .041" thick gasket will drop the compression quite a bit no?
|
stick to 9.5
|
Originally Posted by George C....
(Post 5307303)
stick to 9.5
|
not as much as you think it will in that case, choose a different cam to bring torque in
unless you have a good tuner |
Originally Posted by George C....
(Post 5307306)
not as much as you think it will in that case, choose a different cam to bring torque in
unless you have a good tuner What headgaskets should I run? I have LS9 gaskets but the bore size is way larger on the LS9 so I think there are more ideal gaskets out there. I also have 5.3 GM replacement gaskets (same as LS1 I believe). |
Ls9 gasket will do job...
|
Usually the Powdered metal guides in these heads are ok.
|
Originally Posted by 1FastBrick
(Post 5307584)
Usually the Powdered metal guides in these heads are ok.
|
All times are GMT -5. The time now is 12:02 PM. |
© 2024 MH Sub I, LLC dba Internet Brands