FS: Rebuilt M20 885 Cylinder Heads (and more) by BimmerHeads

[eskimo810]

This is probably a dumb question, but hey, I'm learning.

If I'm starting with a completely stock M20B25, what "supporting" modifications would you do to get the most out of a head like this? Are there worthwhile gains from running this with just a chip and some bigger injectors?

I would be keeping it naturally aspirated. I can't help but be interested in what seems to be a very fine product. Thanks for any advice.

[BMWManiac]

I just want to ask to be 100% sure, but you are supplying the heads? We don't ship you our heads to have this done?

Will definitely be sending you a note in June/July when I start my E30 build for boost! What cam grind spec do you recommend for boost (between 8 - 15 psi)

[MR 325]

This is probably a dumb question, but hey, I'm learning.

If I'm starting with a completely stock M20B25, what "supporting" modifications would you do to get the most out of a head like this? Are there worthwhile gains from running this with just a chip and some bigger injectors?

I would be keeping it naturally aspirated. I can't help but be interested in what seems to be a very fine product. Thanks for any advice.

Yes, you will still get power gains from an off the shelf chip and 17/19lb injectors.

To maximize power you'd want to do a MAF conversion, possibly WAR chip or Megasquirt if you want to get serious. Some headers and a nice exhaust are always compliment the better flowing head too. None of this is a "must" though.

I just want to ask to be 100% sure, but you are supplying the heads? We don't ship you our heads to have this done?

Will definitely be sending you a note in June/July when I start my E30 build for boost! What cam grind spec do you recommend for boost (between 8 - 15 psi)

We build heads from in-house cores. You do NOT need to supply a core head.

[eskimo810]

Yes, you will still get power gains from an off the shelf chip and 17/19lb injectors.

To maximize power you'd want to do a MAF conversion, possibly WAR chip or Megasquirt if you want to get serious. Some headers and a nice exhaust are always compliment the better flowing head too. None of this is a "must" though.

That was my impression, thank you! I'll probably be back once spring rolls around. :D

[James Crivellone]

Toss me a PM, but how much am I looking at a factory fresh head? No polishing, no porting, no regrinds, etc Just a nice 885 B25 head

[MR 325]

Shipped another head to a happy R3V customer on Saturday! :)

Two more being built now.

[ROLLingKING]

purchased... can't wait for this bad boy

Im guessing you drift.
Im going to be doing this in a couple months if the seller is still offering. post performance gains! PLEASE!lol
And how many rpm's can u bring this up to with some VAC double coil thingy valve springs!?

[assblaster]

ah man this looks so sweet, Im in the middle of dealing with milkshakes and I really hope my head isnt beyond repair but if it is I now know where Ill be buying my next one!!!

[iwantspeed]

Toss me a PM, but how much am I looking at a factory fresh head? No polishing, no porting, no regrinds, etc Just a nice 885 B25 head

same question

[MR 325]

same question

PM sent.

[MR 325]

Thanks for the orders guys!

Shipped a head out today, finishing another to ship next week, and one more waiting to be started!

Thank you R3V for giving your business to the "little guys".

[MR 325]

Another head will be shipping today and two more in the works. Thanks R3V.

[nokincy]

Would there be any chance of M42 heads being done?

[MR 325]

Would there be any chance of M42 heads being done?

I am sorry for not replying to this sooner.

We do not have any M42 cylinder head cores available. It is definitely something we can do and we HAVE done one for a happy customer. If you'd like to ship your head to us drop me a PM and we can work out pricing.

Thanks,
Matt

[BergerNJ]

so I've done some researching....do I need to run an adjustable cam gear with a hotter cam?

I've read countless threads on here and e30tech saying some guys don't and some do......doesn't make sense....piston contact or no?....if I don't stay anal on my valve adjustments how much danger am I putting myself into? Should I just stay on a stock or very mild cam?

also...what would I need to source from my original head to the new one in order to run this?

I know stretch bolts are used for the head and are one time use.....but what about the exhaust and intake mani studs? should they be replaced?


I'm 90% on an oem head gasket kit, buying a t-belt+tensioner and doing the water pump again if it has any play in it at all...its only like 10k old..

what else will I need? sorry if I'm derailing the thread but I've searched here and e30tech to my wits end.