Cometic MLS HG install. Need to know?

[Tomas Beblar]

Replacing/Installing a cometic mls hg. What do I need to know?

I used a blade to scrape off the block surface to get rid of what looks like carbon build up or some sort of sealer.  Also using a scotch brite pad and a little brake cleaner to clean the surface. Is that enough or do I need to do something else.

When installing the HG do I need to put some sort of sealer on the mating surface?

Head has been rebuilt and decked.

[Eddie ly]

Usually when MLS hg is use, both mating surface need to be milled very smooth for best result. You may not have any issue with only the head milled if you not running high boost. If you not planning on high boost, probably better with stock composite hg.

[daniel sanat]

i was running 26 psi on a big 16g with a cometic gasket ,and just the head plained.didnt have any issues what so ever.

[Tomas Beblar]

Thanks, head is installed.

[Eddie ly]

Follow the fsm torque sequence, torque to spec and re torque after 100 km or so.

i was running 26 psi on a big 16g with a cometic gasket ,and just the head plained.didnt have any issues what so ever.

I tried running my fp68 to 27psi, but it would tapered down to 23~psi (stock hg no issue).
How were you able to hold 26psi on your big 16g?
I want to be able to run mid 30psi on my new setup.

[daniel sanat]

Follow the fsm torque sequence, torque to spec and re torque after 100 km or so.

i was running 26 psi on a big 16g with a cometic gasket ,and just the head plained.didnt have any issues what so ever.

How were you able to hold 26psi on your big 16g?

my guess is lowells witchcraft tuning abilities