What Head Gasket?

[nando]

I don't know if I buy jim's theory on that one or not. Lots of people have the head welded and never have problems with cooling. BMW actually made the same design change on later M30 heads.

[Dyno4mance]

I wouldn't even consider an MLS on an N/A engine.

plus you have studs - a good quality OEM headgasket and the proper torque on those puppies is all you need. and of course good tuning and proper cooling system maintenance. I'm guessing you're not going to try and use the stock chip/ecu with an 11:1 CR race motor, so no worries about a poor tune causing problems. :)

I will eventually use MS as engine management...everything is new on the motor and has cost over $5000 to build....I am however going to experiment on the dyno during break in using race gas with the stock motronic as I feel even with the added CR the race gas will have enough octane to keep det at bay...and hopefully make a lot more power without changing a thing...

[Dyno4mance]

I don't know if I buy jim's theory on that one or not. Lots of people have the head welded and never have problems with cooling. BMW actually made the same design change on later M30 heads.

I tend to agree with you....
What do you think of the spray bar mod they have going?

[digger]

That was the answer I was initially looking for, So the mm piece is just made of stock material....?

Yes, they are Goetze.

[Dyno4mance]

Yes, they are Goetze.

Do you have aMulti layered steel gasket on your e21?

[nando]

I tend to agree with you....
What do you think of the spray bar mod they have going?

potentially a good idea if you are going to be spinning it high in the RPM range for long periods of time. the M20 head tends to fill with oil quite rapidly. I don't know about on a daily driver or a car that sees low RPM/idle very much. At the very least, i would get a new one and make sure it's not bent or spraying in the wrong direction.

[digger]

Do you have aMulti layered steel gasket on your e21?

i have a standard goetze in my E30 which is my only car.