Head Rebuild (possible upgrades) questions

[henryki]

Sup R3v, my M20 has been burning oil since the day I bought it, but has only gotten worse, and its burning a lot of oil in cylinders 1 and 2. So I'm getting the motor rebuilt, and on the head I want to put a cam in it, but have 0 experience on what cam to use and what to do about an ECU.

So I'm asking what other parts I'll need to buy if I get a cam (recommended and necessary)

Thanks y'all.

[Cabriolet]

are you really ready to drop $4-5k?
it sounds like you wont be building this yourself.

parts alone are 2k
cam+rockers+ecentrics is $650+
labor, machining 2k+

[henryki]

Labor for me is being done at a shop where my friend works, so labor is gonna be a 30 rack + $250 :up:

[henryki]

I just want some info on the parts required for a cam upgrade

[Cabriolet]

msg MR325. he will hook you up with the top end stuff. or you may just want to get the head from him.
you will need to have the crank mic'ed and the cylinders mic'ed and honed. then you will need to order bearings/rings accordingly. let me get a list of what you need. but plan to be shocked by the cost

[henryki]

msg MR325. he will hook you up with the top end stuff. or you may just want to get the head from him.
you will need to have the crank mic'ed and the cylinders mic'ed and honed. then you will need to order bearings/rings accordingly. let me get a list of what you need. but plan to be shocked by the cost

For sure, thanks for the info, just trying to see if it would even be worth it to do a cam swap, but I'm starting to think no and just keep it all stock, but still it'd be good to know how much I'd be looking at.

[Hobbit]

I have my head rebuild. Get a 200 head from an e21 323i K-Jetronic. It has the same head as the eta have, but have double oiling holes inside.
Get an eta intake manifold with the long intake chamber.
Fill up the combustion chamber by welding some material in it and get it symmetrical.
Why to do that?:)
200 heads have the smallest intake ports related to the inlet valve area. You will get increased gas velocity, and you will gain much more power than the expensive port polishing.
Eta intake manifolds are compatible with the 200 heads, longer intake chamber with smaller cross-section will produce more torque from lower rpms, and your car will go faster, you do not have to wait the 4000 rpm for getting your vehicle accelerate. And not to mention that it can receive injectors. The K-Jet manifold do not have any injector ports.
Welding inside the combustion area will raise up your CR. I have approximatelly about 11 CR. Try it:)

[Cabriolet]

^ That right there is some of the worst advise i've ever head.
henryki, ignore all of that.

[matthugie]

I have my head rebuild. Get a 200 head from an e21 323i K-Jetronic. It has the same head as the eta have, but have double oiling holes inside.
Get an eta intake manifold with the long intake chamber.
Fill up the combustion chamber by welding some material in it and get it symmetrical.
Why to do that?:)
200 heads have the smallest intake ports related to the inlet valve area. You will get increased gas velocity, and you will gain much more power than the expensive port polishing.
Eta intake manifolds are compatible with the 200 heads, longer intake chamber with smaller cross-section will produce more torque from lower rpms, and your car will go faster, you do not have to wait the 4000 rpm for getting your vehicle accelerate. And not to mention that it can receive injectors. The K-Jet manifold do not have any injector ports.
Welding inside the combustion area will raise up your CR. I have approximatelly about 11 CR. Try it:)

For posterity. I literally don't have words.

[henryki]

^ That right there is some of the worst advise i've ever head.
henryki, ignore all of that.

Yeah I know nothing about heads and that just sounded absolutely retarded.

But I just saw your signature. Wow. Much approve. Such Laughs. So appreshiatuv. wow.

[SkiFree]

Honestly Henry, spend an evening with google. Many have gone through this before and documented things very well.

When you say "engine rebuild" I assume you are boring the block and getting new pistons, new cam, rockers...... or are you just doing a "refresh" with rings/seals?

[digger]

its not clear if you are doing just a head rebuild? if so then a rebuild head from bimmerheads is probably best BFYB.

and the 200 head has a place but this is not where you want to be going with a "simple" rebuild

[MR 325]

If I can help you drop me a PM. Since you're local it would make things easy!

There's no other required upgraded to adding a performance cam but I'd definitely recommend new rockers at a minimum.

If you were to buy our 274 cam (or our head with a 274 cam) we offer a tune to match it.

[henryki]

If I can help you drop me a PM. Since you're local it would make things easy!

There's no other required upgraded to adding a performance cam but I'd definitely recommend new rockers at a minimum.

If you were to buy our 274 cam (or our head with a 274 cam) we offer a tune to match it.

Trying to look at your website using safari on my mac, and it wont load! had to download chrome just look at it, but on your heads what is your valve guide clearance and installed height?

[Hobbit]

for those who says I am a retard:

http://speedtalk.com/forum/viewtopic.php?f=1&t=8652

at the end of the conclusion:
'I calculate the following for the '200', '731' and '885' respectively:93m/s, 76m/s and 77 m/s the last two are lower than I had expected'
If you want power, you will need gas velocity:)
dialoge end...