67King

Okay, I looked it up. It is an M54B30. Here is a thread Karl made when we built it: http://forums.bimmerforums.com/forum....php?t=1422245

pettybird

FIFY.

refresh951

Had some time to kill so I worked out a cheap way to hone the stock intake manifold. I used a $2 flexible bolt retriever (hacked up) from Harbour Frieght and a roll of 80 grit emory cloth to make a flexible "flap wheel" as shown below. It is not quick but pretty happy with the results. I have no problem running through the runners around bends. It is doing an effective job at cleaning up the surfaces.

CyCloNe!

you sir are awesome. When I grow up I hope to be like you

mudbuddha

Nice work Shawn. Interested in how this project turns out. Do you have a way to test before and after the port job?

refresh951

My High Flow Head Project is complete. We used a mill to do a bit of un-shrouding of the intakes as shown below.





The guy who is doing the flow testing for me on a SF600 is on vacation this week so the flow testing will be done next week. The plan is to do testing as follows:

25" (water column) at 0.472 Intake lift and 0.437 Exhaust lift to compare with some data posted by m42racer on a stock head. The testing was performed by Performance Developments.

28" (water column) at 0.480 Intake lift and 0.480 Exhaust lift to compare with some data posted by LR website for different performance heads.

I will post the flow results in this thread. I do not have all the machining costs as of yet. When I do, I will post the final cost breakdown.

333pg333

Great work and thanks for the updates. Be great to test the stock intake on this head too?

blown 944

Shawn try to do some lower lift numbers as well. Ie .050,.100,.250

It would be nice to see how they look with the larger valves. If you need a stock head to compare with on the same bench I can send you one.

refresh951

Yes, I was planning every 0.050" just as m42racer had done. Here is his numbers on a freshened up stock head:

23.1 29.8 19.9 24.7
47.0 56.0 44.6 55.1
77.7 87.8 70.6 86.2
105.8 116.3 93.8 109.0
133.7 143.6 105.8 116.8
147.6 161.3 121.7 134.6
162.3 174.2 132.9 144.8
171.0 187.2 143.8 157.2
178.7 196.8 149.4 163.6
186.7 202.9 151.2 166.8

This was done on a SF600. I was thinking if I had it done on the same model Super Flow bench, I could use his data for comparison?

blown 944

It should be relatively close. However, the humidity, and overall density of the air will change slightly. Having back to back comparisons is best IMO.

333pg333

Shawn, sent you an email.

FBIII

Go over on the 928 board and search: 2 V headflow figures - project update

333pg333

^^Interesting read. Just getting into it, but a quick question. Am I to understand that he got 298cfm on the Intake of a 2 valve head? Is this to be directly compared to our 2V heads? How has he achieved this figure which is waay higher than our best? (Approx. 250cfm) Just doesn't seem feasible??

I shall continue reading the thread...

FBIII

928 Euro S heads are probably pretty comparable to a 944 head. The fellow doing the work is a real phanatic and creditible. He had posted some pictures but it was so long ago they no longer are there. I imagine he would be more than happy to forward them as he always shared his ideas.

refresh951

Slate Blue has some interesting stuff posted. Thanks for the info.

Interesting post on Pelican that he referenced:

http://forums.pelicanparts.com/911-e...-dark-art.html