this is a good thing because 1 horsepower isnt much gain but over 14 hours of racing its huge

I’d love to see your flow numbers on this head.

Woah, 3D printed template, nice!

Did this same exact thing a week ago on M54B25 head with M50B25 intake manifold with a bit different approach. I cut 10mm aluminium flange on waterjet using M54 port diameter and spacing. Blended that flange to M50 manifold the same way, so intake ports are untouched in the head and only the adapter flange is port matched. Made zero max hp gains, only 3000-6000rpm torque increased 5-6Nm across the rpm range. Interestingly peak power was at 5900rpm after the adapter flange, and 6100rpm before. Had to make slight adjustments to intake cam timing to get same max hp. Dynoed and tuned the car before the adapter flange and after port matching the flange to the manifold. 190whp with M54B30 intake cam, headers (unequal lenght), 3" single exhaust, B30 injectors and E85. My old M54B25 with same mods otherwise but stock intake manifold made 199whp and more torque everywhere. The runners are too long and big volume in the M50 manifold compared to M54 manifold. Might make some gains on 3 liter B30, but waste of time on 2.5 and 2.8 engines.

Another very informative video as usual. Great job documenting the steps involved and the process in general. Have a great day Dave

Great KZfaq channel. M54 heads have potential. 🍻

Im buying my 4th M5xx car soon, did SCCA stuff with my 330ci, but never thought of porting and polishing until like 3 days ago, and here you are one day ago on this exact application lol i just dont know how id feel about it unless it was for a turbo application with M50 runners from VAC motorsports, might have to pick up a spare Head and a lower compression gasket just to test things

Hi Dave can we see Nissan SR20 cylinder head videos it will be much appreciated

Great information, because I had a lot of question marks in my head with the cylinder head you send me and installing a intake that I have not purchase yet.

Thanks Dave! Another great video!

Thanks for sharing 👍

Ich hoffe wir werden erfahren welchen spec der M54b30 mit M50 brücke fahren wird. Und welche leistung das bringen wird . Danke sehr 👍

I know what you mention about flow numbers don't tell the sorry, and speed is king, did you check a before and after to see what was affected or improved since this is a new cylinder head for you.

Very good..!!!

Hi Dave, just next week they will bring me a cylinder head like that to do the same thing. My question is what honest opinion do you have about doing that and if the intake port is already excessively large. People go crazy with the m50 intake manifold, but I think that with the m54 it has enough air. Greetings and thanks for your time. Goyo

🔥

This is a turbo thing for the m54 because the factory m54 intake is poo poo pretty much like all BMWs are poo poo. Jk. I have a e46 vert but it’s Ls3/t56 swapped but no really bmws are shiz boxes when compared to Japanese or American cars. Ultimate driving machine sure! they drive good when they run and you get past all the stupid quirks like bump steer, or a rear end that’s glass, and the cracks in the body’s suspension pickup points. etc etc. they look great tho!

What gaskets did use use for the port matching

Can you do 1uz head flow bench test? I keep hearing the heads do not flow very well.

This might be a dumb question. Stock to mild cam verses wild race cam with lots of duration ...etc. Do ported heads make more power difference as you go from stock smooth cam to radical cam? I'm building a Pontiac 400 and I'm wondering if it would be worth the effort to port the heads if I'm using a BP6014SP cam and I wonder how much it would gain with that cam I'm thinking about 25 hp? increase with #13 heads? I still can't decide what valves to get for it

What process do you use when doing something like this? 100% complete one port then use it as a reference for the rest or rough out all of them at once then sand then all?

What was the white template for?

🇦🇬 ⭐️⭐️⭐️⭐️⭐️. 🙇🏾‍♂️

What the heck is up with the casting of that head? Did they just press a bunch of aluminum beads together, or actually cast it? It looks like painted styrofoam. Building that way seems like you are asking for cracks, etc. with no consideration for longevity. Is this the current trend in OE manufacturing? Can you do a video on the evolution of head manufacturing?