Extra data in the game. 13B size, Higher compression, always good news. I
deal runner and header length and diameter for 7,500, 130 HP. Just a guess.
Put it in a car and get it on a chassis dyno. Pports can be very unhappy with
poor muffling systems.
Or build one if you have a reduction system and a prop big enough to
absorb the power.
Here is a display dyno that could include HP and thrust if some play is
left in the pillow block bearings.
Lynn E. Hanover
Thanks Lynn,
Yep! I'm working on the runner length, but I don't want to
make them too big and lower velocity, 44.. or about 1.73" is bigger than
I originally envisaged, I was originally looking at 1.5", then 1.6 to overcome
butterfly disturbance/restriction, but I didn't want to go to 2", as I thought
this unnecessary for the RPM.
I though the higher compression would be best for the single
- thanks for confirming that.
Will definitely have it run on a Dyno when
completed.
Have been working with Bill Jepson on the Magic
Muffler!!
I am seeing a chap Monday on the crank shaft, he seems to be
the person I'm looking for - will see.
BTW cut down a double crank to compare weights and found the
2 rotor weight is 13 lbs and the single 5.5 lbs ( approx) - if anyone was
interested. I initially cut one down and joined the two pieces to give the
machinist an understanding (visually) of what I'm wanting - it all
helps.
125HP would be great and 130HP would be wonderful - am
working on it.
George ( down under)
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