325i 885 head modification to increase compression

[Fidhle007]

I've been a mechanic,machinist,custom fabricator for over 20 years. I own a repair business, Im suprised many of you with experience are laughing at this idea. No sense of adventure I guess, I wanted to try something different, out of the box. The negativity makes me laugh cause noone really knows what this could do. I have these heads sitting side by side, it can be done. They arent very different

And Saddam Hussein had weapons of mass destruction...

[Red88]

And Saddam Hussein had weapons of mass destruction...

Wrong forum.

[dougs87325is]

And Saddam Hussein had weapons of mass destruction...

You don't know me so you wouldn't know. You must like making yourself look pretty ignorant with retarded comments. I'm sure this isn't the first time you've heard this. Is there a way to just iggy your ass? DOLT

[E30Nova]

No, this is the first time we've heard this. Most people have enough common sense to not try and redesign combustion chambers for more power. Only to then go back to stock later when they have money for a turbo.

Do you know how stupid that sounds? Why not just get an eta head and slap that on if you want the compression? And then when you have money for the turbo, put the i head back on?

Or better yet, don't waste time swapping heads? It's a friggin M20, you're not gonna get a ton of horsepower out of it n/a.

Matt

[dougs87325is]

MAtt, Im into doing all kinds crap. One of them happens to be eventually to put enough money in this block and stock parts to see what it takes to BREAK IT, for fun. Guess Im in the wrong forum to see what these things are made of. Im just trying to verify the rumors for myself, havent seen these broken yet, just 1 rocker arm so far.My intentions are to blow the crap out of this thing to see what it can do.

[dougs87325is]

Fid, is that a low 15 or high 14 second car? Oh, must be my IN EXperience, Im sure it's much faster.....blah..

[nando]

you think you're the first guy to boost a 2.7i? really? Gonna reinvent the wheel on a 25 year old engine design?

[reelizmpro]

You guys are harsh. It's been done before by a few shops just not really on BMW's. Along similar lines...Metric Mechanic made a name for themselves back in the day by grinding grooves/reshaping combustion chambers on BMW heads. They called it "Surface Turbulence". They claimed it helped reduce laminar flow and re-homogenizes the fuel mixture for a better burn. Another well known machinist I know (an Edelbrock guy), welds more 'meat' onto certain parts of a head just so he can make the intake ports larger when he ported it. He would not be able to go as large with the stock design.

[nando]

You guys are harsh. It's been done before by a few shops just not really on BMW's. Along similar lines...Metric Mechanic made a name for themselves back in the day by grinding grooves/reshaping combustion chambers on BMW heads. They called it "Surface Turbulence". They claimed it helped reduce laminar flow and re-homogenizes the fuel mixture for a better burn. Another well known machinist I know (an Edelbrock guy), welds more 'meat' onto certain parts of a head just so he can make the intake ports larger when he ported it. He would not be able to go as large with the stock design.

there's a difference between what MM does, with a flowbench and empirical testing, and a hilljack in his backyard with a welder and no clue why it's a bad idea.

[der affe]

welding for bigger ports is nothing new, neither is redesigning the stock chambers. without the abilty to test what you are doing along with a way to closely duplicate at least 6 times. you are pretty much pissing up a rope.

have you thought about just buying higher comp pistons? when you go turbo, get lower comp pistons, sell the others to recoup some cash. done deal.

[1craze30]

as one man once said, "You can't polish a turd."

[Fidhle007]

You don't know me so you wouldn't know. You must like making yourself look pretty ignorant with retarded comments. I'm sure this isn't the first time you've heard this. Is there a way to just iggy your ass? DOLT

If you're too stupid to figure out how to ignore me you should never touch a car...

MAtt, Im into doing all kinds crap. One of them happens to be eventually to put enough money in this block and stock parts to see what it takes to BREAK IT, for fun. Guess Im in the wrong forum to see what these things are made of. Im just trying to verify the rumors for myself, havent seen these broken yet, just 1 rocker arm so far.My intentions are to blow the crap out of this thing to see what it can do.

Hmm, this story sounds familiar. Whatt18yahoo, is that you?

Fid, is that a low 15 or high 14 second car? Oh, must be my IN EXperience, Im sure it's much faster.....blah..

there's a difference between what MM does, with a flowbench and empirical testing, and a hilljack in his backyard with a welder and no clue why it's a bad idea.

Nando, can we be friends?

welding for bigger ports is nothing new, neither is redesigning the stock chambers. without the abilty to test what you are doing along with a way to closely duplicate at least 6 times. you are pretty much pissing up a rope.

have you thought about just buying higher comp pistons? when you go turbo, get lower comp pistons, sell the others to recoup some cash. done deal.

Thank you. Can we be friends too?

[Lof8]

You could also take an angle grinder to the crank while you've got it apart. Lose a little weight from those rotating parts, ya know...make it scream!

Quit asking questions and just go for it. Post up some pics too.

[der affe]

If you're too stupid to figure out how to ignore me you should never touch a car...



Hmm, this story sounds familiar. Whatt18yahoo, is that you?





Nando, can we be friends?


Thank you. Can we be friends too?

shit not only can we be friends, if you get me drunk, we can snuggle.

[Fidhle007]

Can I be big spoon this time?