flyrotary@lancaironline.net Mailing List Archive

----- Original Message -----

Sent: Tuesday, May 11, 2004 5:01 PM

Subject: Re: [FlyRotary] Re: injector relocation predictions?

Rusty.....my intake runners are also 30 inches, just like the Powersport engine and the Mistral rotary engine. I am considering relocating the injectors to the first bend of the intake tubing, closer to the engine, primarily to stop the few drops of fuel that drip out of the throttlebody just after engine shutdown. (The throttlebody runss downhill for cowling clearance). My idle is great. I don't know about throttle response because I don't have the prop on it yet. Without the prop, I now have it idling smoothly at 1000 rpm. I'm thinking that a prop will act as a flywheel and possibly give me an even lower idle?

Here is a link that sells weld-on injector bosses and fuel rails. www.ptrsds.com/manifolds%20.htm They will also take your manifold and add the injector bosses and fabricate a custom fuel rail if you want to spend money. Take care. Paul Conner, thinking about spending money.

----- Original Message -----

From: Tracy Crook

To: Rotary motors in aircraft

Sent: Tuesday, May 11, 2004 12:46 AM

Subject: [FlyRotary] Re: injector relocation predictions?

Really? 30 inch runners? I knew they were long but that's just way too long. I don't think injector relocation will fix power but it should do wonders for idle, low throttle tuning & throttle response.

Tracy

----- Original Message -----

From: Russell Duffy

Sent: Monday, May 10, 2004 9:33 PM

To: Rotary motors in aircraft

Subject: [FlyRotary] injector relocation predictions?

Greetings,

As I mentioned before, one of the relatively easy options for improvement will be to move the 4 injectors, and keep the current intake. As they are now, all 4 injectors are in the TB, which is 30 inches away on the cold side of the engine. I believe I can mount the two stock primaries back in the block, and can probably mount the two secondaries in the intake, maybe 2 inches from the engine.

Here's the question, do you think this will increase power? In other words, am I losing power by having the injectors coating the inside of the long tubing, rather than efficiently delivering the fuel to the engine?

Thanks,

Rusty (thinking of draining one fuel tank, and filling it with helium to improve climb)