best head gasket for 91 tsi

[JET]

That is exactly why I now use a stocker. I melted some big channels in the head when I was on the dyno with the cometic HP. I would rather spend 3 hours changing a head gasket than having a head rewelded.

[dumb_ricer]

No one will ever agree on what head gasket to use.

Cometic = High High Boost applications (28plus PSI, ONLY if block and head are both properly machined)

SCE ICS = High High Boost applications (28plus PSI, can be used on non true surfaces, but not recommended)

OE Mitsu = Any regular old DSM (up to 25psi on anything up to a 50trim)


While I haven't seen much about the SCE ICS headgasket, I know that copper is a FANTASTIC material for a head gasket, and I see it possibly making cometics go obsolete. The fact that it has a built in steel ring that acts a tiny bit like an O-Ring I find sweet. Downside is if the head starts lifting (fucking cylinder pressure!) you can start to ruin things. Same goes with any other gasket though.

Thats my .02

[EclipseGST]

No one will ever agree on what head gasket to use.

OE Mitsu = Any regular old DSM (up to 25psi on anything up to a 50trim)

I've ran 35psi with the OEM head gasket and 42psi with an o-ringed head and OEM head gasket.


As for the opinions...

I'd use a OEM H/G as well.

[JET]

Yeah, saying the stock HG is good to 25 psi on a 50 trim and under is just dumb. I know one member that finally got the stocker to pop at 41 psi on the dyno. It held high 30's fine. Oh yeah, it was bigger than a 50 trim too and made over 500 whp.

[niterydr]

Yeah, saying the stock HG is good to 25 psi on a 50 trim and under is just dumb. I know one member that finally got the stocker to pop at 41 psi on the dyno. It held high 30's fine. Oh yeah, it was bigger than a 50 trim too and made over 500 whp.

"No one can agree".
:news:

Unless everyone on this website is wrong for successfully using OEM headgaskets for years, I think there is an agreement.

[dumb_ricer]

On a motor that is going to be running 40lbs of boost, please give me a good reason to run a OE composite gasket other than inability to tune.

Wait, wait, I got it! The OE's are wrong for using non composite gaskets in almost all high HP factory engines now! Sorry, MLS and Copper head gaskets suck!

For high horsepower applications, there are MUCH better options out there IE Cometic and SCE ICS, or hell, even an OE Mitsu MLS.

[v8klla]

"No one can agree".

I really think someone from there could actually give proper tech input on the subject at hand.
:news:

Unless everyone on this website is wrong for successfully using OEM headgaskets for years.

Maybe if you would stop being a jackass and listen to what we are saying rather than think of yourself as the almighty car god you would get the point we are trying to make.

Will the OEM head gasket work for this application? Yes

Is it the best head gasket available? No.

Perhaps you should read the title of this thread more closely? And you can't honestly tell me that the OEM head gasket is the best choice running upwards of 40 psi???

Here is some "proper tech input" on a material known as Copper, and three reasons why it makes a better head gasket:

1. Conductivity. Copper is the standard by which all other conductors are measured, therefore a copper gasket provides superior thermal conductivity, acting to stabilize head and block temperatures which makes tuning easier.

2. 25% coefficient of elasticity. One of the properties of copper is that it stretches before a catastrophic failure, thereby providing an extra measure of safety in case of severe detonation.

3. Strength. Copper has a tensile strength of approximately 32,000 psi, compare this to the 1,200 to 1800 psi tensile of most facing materials used on conventional performance head gaskets.

[scheides]

Easy now boys. ;)

[Shane@DBPerformance]

Copper normally shouldn't be used unless you are doing an O-ring/reciever groove setup on the block/head. People have had nothing but problems with copper headgaskets the last 10 years on DSMs. Maybe these new ones are better, but the older SCE stuff was crap.

Stock headgaskets are awesome, I run 28psi on stock headbolts with them on my own cars. The Mitsu metal HGs are awesome until they start leaking between the layers. Cometics are great also when the surfaces are prepped properly. There is a reason why they stopped making the Cometic HP versions also.

[v8klla]

Copper normally shouldn't be used unless you are doing an O-ring/reciever groove setup on the block/head. People have had nothing but problems with copper headgaskets the last 10 years on DSMs. Maybe these new ones are better, but the older SCE stuff was crap.

Stock headgaskets are awesome, I run 28psi on stock headbolts with them on my own cars. The Mitsu metal HGs are awesome until they start leaking between the layers. Cometics are great also when the surfaces are prepped properly. There is a reason why they stopped making the Cometic HP versions also.

I agree without the ICS (Internal Combustion Seal) the SCE wouldn't be a viable option. It is as close to O-ringing as you can get without actually doing to machine work lol. And as far as I know the Cometic HP's were discontinued based upon their version of the ICS which moved around freely and caused several issues when not properly installed...

Stock head bolts huh?

Chris