Logged in users > User Diaries
Treadmill Dyno
taylorp035:
Bringing back this thread to show off the next stage of the rotary valve engine development!
Now in a 1999 BMW 328is 2.8L inline 6 engine. A first in many respects, including converting a modern production car, an Inline 6, and a BMW. It has some fun features including muffler bearings, exhaust bearing coolant, coolant running through a floating seal around the sparkplug, contra-rotating valves, 6 velocity stacks with no obstructions going right into the cylinder, custom double bevel gear box with homemade "cam lobe", multi-tiered oiling system, and a fully re-mapped cooling system that has many clear hoses.
Over 700 components, fully integrated into the stock engine bay.......... so bolts right up to the exhaust, all the sensors and hoses and stock intake. No programming of the ECU has taken place yet (many people said this would never work). We machined about half the components ourselves to save cost, but the bigger ones exceeded the capacity of our tools so they had to be sent out.
I'm getting really close to taking it back to the dyno to see how she fairs. Still working out some kinks, but it has over an hour of run time on it and about 3 miles of hard driving in my back yard and up and down my driveway. There have been moments where it seems like it has more power than the stock engine. Sealing seems to be much better than the ego-kart engines and it has good compression and spark.
And I have to give some congratulations for BMW making such a robust starter motor.....
https://www.youtube.com/watch?v=GdmzrVj9n7s
https://www.youtube.com/watch?v=_3egpax5sZI
https://www.youtube.com/watch?v=W7x-3fukxhE
https://www.youtube.com/watch?v=gVU1jK0yono
https://www.youtube.com/watch?v=BYpECSaNMhE
https://www.youtube.com/watch?v=10xnE8W3Qe0
https://www.youtube.com/watch?v=-8iTKxYdLb4
SparWeb:
HAha!
If there was ever a reason for your "check engine" light to be on...
I'm glad I clicked on the last vid first: Smoke and fire and blue flashes, oh my!
taylorp035:
A picture of the engine bay when it was a bit warmer outside. It's waiting for timing belt #4 to be delivered and installed.
taylorp035:
Pulling this thread back to the surface with a new video on my rotary valve BMW engine. This winter we designed, machined and installed some inserts in the floating seals to reduced the effective valve opening duration to something closer to a muscle car than a 9,000 rpm drag racing engine. It's much quieter (but not too quiet...) and now idles on all cylinders.
https://youtu.be/NR6hlyy6VsY
SparWeb:
Still fascinating to see the progress you've made on this.
Are you still working on the valve port geometry?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version