There was a forum with head flow comparison, m54, m50, s54 etc, and there it was clearly shown that m54 stock intake is the worst. I can make a video of what I did, basically I have cleaned up the intake port, there is a lot of cleaning to do. Not only the cast marks, but uneven transitions etc. Most of the time ive spent around the valves and valve guides, I did not enlarge the port openings even one bit. I did the same for exhaust side, but there was far less job to do as I remember. Do not port the shorter radius side. You want smooth consistent ports with nice transitions, larger is not always better. You want the size to be efficient and just enough to not choke the engine. What I did also was add an angle to the valve seat and the valves as well. Ive also modified the chamber side of the head as well, when valves open a bit they have a flow path all around them now, unlike before. If you are not in a hurry I strongly advise you to look up David Vizard on yt, he Is an elderly man extremely experienced and has a lot of videos explaining what works and what doesnt. Also put video speed at least to 1.25, youl get why :D. I really think I did a good job, there was gains and no losses, but sadly I can not prove it now as I do not have the logs no more and an engine is supercharged. I could tho remove the supercharger and make few more maf logs and compare it to other engines. I urge you to do logs before and after.
@@TomoReso Thanks a lot for the super detailed reply! I was planning on installing an M50B25 intake manifold (which ideally needs port matching - hence the original question, why not go a little further, especially with the cams!), Schrick 272/256 cams, Mahle forged 10.5:1 pistons... the goal is to make it a nice OEM+ street engine with proper pulling power up to 7k. The car has currently got an M54B22, and I definitely believe a few horses have left the stable. It already has a 3.38 diff from the factory and even with the cams and M50 manifold, the B30 will make a good bunch more torque than the 2.2 so I'm fine with that. As long as it pulls hard above 4k and sounds good, I'll be happy :D What tools did you use for porting? You did everything yourself, without any professional help, correct? I'll definitely look up David Vizard. I was planning on learning how to log and remap with this project too. A friend has experience with remapping on E85 so we'll work on this together. Especially given how much info there is out there! Thanks again
@@nvl2691 M50b25manifold produces awesome sound above 6500rpm as to where m54 dampens the sound a lot. Powerwise dont expect a lot from it (manifold alone). It seems like a cool project, will sound and feel nice. All of the work I did myself, using basic cheap tools. Electric drill with cord extension if its called like that, and various bits i got with it. Also spraying wd40 on aluminium or the bits every now and then keeps the bits from filling with aluminium, makes for the better work. Took me about 15+ hours to port the head and valves. Could be done faster ofc, but I always think like i have to do it only once, slowly and patiently, and ive made no errors in process. I actually quite liked the porting job, was fun. Always glad to help if I can so no worries.
Hey Tomo. Any tips on how to do this properly?
Planning on rebuilding an M54B30 this summer. Thanks!
There was a forum with head flow comparison, m54, m50, s54 etc, and there it was clearly shown that m54 stock intake is the worst. I can make a video of what I did, basically I have cleaned up the intake port, there is a lot of cleaning to do. Not only the cast marks, but uneven transitions etc. Most of the time ive spent around the valves and valve guides, I did not enlarge the port openings even one bit. I did the same for exhaust side, but there was far less job to do as I remember. Do not port the shorter radius side. You want smooth consistent ports with nice transitions, larger is not always better. You want the size to be efficient and just enough to not choke the engine. What I did also was add an angle to the valve seat and the valves as well.
Ive also modified the chamber side of the head as well, when valves open a bit they have a flow path all around them now, unlike before. If you are not in a hurry I strongly advise you to look up David Vizard on yt, he Is an elderly man extremely experienced and has a lot of videos explaining what works and what doesnt. Also put video speed at least to 1.25, youl get why :D.
I really think I did a good job, there was gains and no losses, but sadly I can not prove it now as I do not have the logs no more and an engine is supercharged. I could tho remove the supercharger and make few more maf logs and compare it to other engines. I urge you to do logs before and after.
@@TomoReso Thanks a lot for the super detailed reply!
I was planning on installing an M50B25 intake manifold (which ideally needs port matching - hence the original question, why not go a little further, especially with the cams!), Schrick 272/256 cams, Mahle forged 10.5:1 pistons... the goal is to make it a nice OEM+ street engine with proper pulling power up to 7k.
The car has currently got an M54B22, and I definitely believe a few horses have left the stable. It already has a 3.38 diff from the factory and even with the cams and M50 manifold, the B30 will make a good bunch more torque than the 2.2 so I'm fine with that. As long as it pulls hard above 4k and sounds good, I'll be happy :D
What tools did you use for porting? You did everything yourself, without any professional help, correct?
I'll definitely look up David Vizard.
I was planning on learning how to log and remap with this project too. A friend has experience with remapping on E85 so we'll work on this together. Especially given how much info there is out there!
Thanks again
@@nvl2691 M50b25manifold produces awesome sound above 6500rpm as to where m54 dampens the sound a lot. Powerwise dont expect a lot from it (manifold alone). It seems like a cool project, will sound and feel nice. All of the work I did myself, using basic cheap tools. Electric drill with cord extension if its called like that, and various bits i got with it. Also spraying wd40 on aluminium or the bits every now and then keeps the bits from filling with aluminium, makes for the better work. Took me about 15+ hours to port the head and valves. Could be done faster ofc, but I always think like i have to do it only once, slowly and patiently, and ive made no errors in process. I actually quite liked the porting job, was fun.
Always glad to help if I can so no worries.
Great results and advice, if you could take the time to make a video and discuss it, I'm sure it would benefit the M54 community. Thanks!
@@TomoReso what do you think about porting m54 exhaust ports to the same size as the exhaust manifold and the gasket?
Gain nothing
very little
Same