flyrotary@lancaironline.net Mailing List Archive

I am new at this engine running thing, having just done the third start/run . I have some instrumentation, and am enclosing a plot of Manifold pressure and Fuel pressure vs. time for the latest run. After letting it warm up at ~14 in MP , I started increasing the power, and you can see that the fuel pressure increases with the MP. Made one brief excursion to ~5900 rpm, swinging a 76x76 prop.

All tests so far are with the cowl off, but the ducts are in place.

Bill;

Lookin’ good. It does seem that the fuel pressure is running a bit low, but I guess it depends on your injectors. Most are rated at a pressure of 40 -43 psi., so when your MAP is 30, the fuel pressure is about 40 psi. I set my pressure a t 40 with engine off; and it then comes down into the low 30’s when at idle.

Al G