headgaskets...factory metal vs. cometic

[gritsak]

im getting ready to put my motor together this week and i need some help first...ive already got a new factory metal headgasket that i was planning on using in my built motor, but after reading a couple threads ive heard a lot of praise on the cometic.

ide rather get the right gasket now rather then have problems later...my setup is a crower/ross combo with an o-ringed block, and arp head studs.

ive got a t3/60-1 turbo and im planning on running it to around 25-30psi at the track with race gas (or on the streets racing).

most people seem to have a lot of good luck with the cometic, ide plan on getting their HP version with the fire rings i guess. so anyways, is there anyone that runs high horsepower and boost on the factory metal with no problems? the head will be resurfaced and the block is fine so it should be a good sealing surface.

and also why im on the topic..is there any reccomendations or tips on preperation for the headgasket install to get the best seal?

TIA

 

[greathuskie]

bump

 

[gritsak]

yeah someone has to have some input....

i did talk to a shop that has several high hp dsm's (like 3 or 4 around 600whp) and they said that they tried using the cometic and switched back to the factory mls because when you tighten down the cometics they smash out over the edge of the cylinder walls.

 

[loreak]

theres another post i just rad that said the cometics are too stiff and have a hard time sealing compared to the mitsu metal HG

i while back i read a thread about someone who was told by a dsm shop there is some sort of sealant, like copper sealant you can put in a thin layer over each side of the HG to help seal against the imperfections

 

[StockSpyder]

We prefer the metal application over the cometic. the spray you are asking about is a copper gasket spray. Make sure to ask for a high temp application, its mostly for reusing your old headgasket and helping to seal things up Hope that helps.

 

[Unreal]

mitsu MLS with mopar headgasket spray. Get it at any mopar dealer.