In a message dated 3/31/2006 9:54:37 P.M. Eastern = Standard=20 Time, echolakeresort@telus.net writes:

Thanks Lynn

I would like to get 200hp at 7500RPM, With a = gross weight=20 of 2300lbs on floats & a cruise speed = of about 120mph=20 it's not like an RV. My plan is a plugs up position = with a 3=20 stage Weaver dry sump pump and a 14 quart oil tank. I = have a=20 90 13b NA (9.7:1 rotors) Mazdatrix street port = template, 3GM=20 evaporator cores in series & RX7 oil cooler (2 if=20 needed), RWS 2.85:1 re-drive, EM2 & EC2 with = an IVO=20 84" controllable propeller. Is 200HP a pipe = dream?

Georges B.

It is possible that you could get = very close=20 to 200 HP with a street port. The last conversations I = had=20 with the two great engine builders I know was that the = E=20 production engines (13B treet ported two 38MM chokes) = were=20 producing 229HP and 231 HP, but at close to 9,000. In = reading=20 about Dave Lemons engines (also E production) he said = he could=20 not get used to shifting after the 10,000 RPM light = comes on.=20 These are in very fast cars, and in most cases faster = than=20 mine (GT-3 12As). Google Dave Lemon. These are = running a=20 limited (by rules) street port.

Turning that big a prop 2,631 RPM = even with=20 no pitch is perhaps hopefull.

The airboat people tend to very = low pitch=20 large diameter props with wide blades. They also use = 550 cubic=20 inch 350 HP engines. The latest gag is two props = counter=20 rotating at differing RPM. That so they can load = the boat=20 and leave from the dry grass into the water and not = need a=20 loading ramp. Check with Ken Weller on that float = plane stuff.=20 He uses a 100 HP nitrous shot (available at any hot = rod shop)=20 to explode out of the water. He has the extra fuel = required=20 figured out and shuts off the trailing ignition during = the=20 shot to prevent detonation. Remember the definition of = detonation? Very clever.

If you were looking for 190 HP = with a 50HP=20 nitrous shot on top of that to pop up I would say no = problem.=20 I have no feel for the drag of floats vice a = displacement=20 hull. Sounds like it would be=20 less.

I am down to 6 quarts in the small = holding=20 tank. Tall and small diameter. It was a new fire = extinguisher=20 bottle. Clean and light. If you don't already own it, = I would=20 skip the weaver brothers pump. I have one. It is a = gear and=20 idler type and cannot pull much of a vacuum and unless = new=20 inside cannot produce top pressure. It just has very = little=20 displacement. A gearotor (ring and rotor) type is what = I use=20 now. The old round style Peterson is fine. the newer = square=20 bodied Peterson is junk. The pressure section splits = open=20 along the bolt holes. Only a college graduate would = build a=20 square pressure vessel. My current pump is the = Moroso=20 with the Ford pressure section (bigger rotors) 1 1/8" = instead=20 of 7/8" (I think). Peterson does have a selection of = Gilmer=20 belt pulleys at a good price. The belts are cheap = through any=20 power transmission store. A friend just paid me = another Moroso=20 pump that I built for a Datsun years back for building = him a=20 rotary he had damaged. So now I have a spare Moroso=20 pump.

Unless there is a real clearance = problem, I=20 would avoid the plugs up thing. It adds several = engineering=20 problems to a very busy program. You can move the = filter to a=20 remote location with no problem. Planes with that = layout tend=20 to land on roads more than others.

Lynn E. Hanover