---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sun 09/25/05: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:26 AM - Re: Bing Carbs (Kingsley Hurst) 2. 09:21 PM - Re: 914 Waste Gate (Matthew Carpenter) ________________________________ Message 1 _____________________________________ Time: 04:26:39 AM PST US From: "Kingsley Hurst" Subject: Re: Europa-List: Bing Carbs --> Europa-List message posted by: "Kingsley Hurst" Carl / Duncan Thank you both for the run down on the Bing carbs. I have no burning desire to do any mods to mine, just a quest to learn more. Thanks again Kingsley ________________________________ Message 2 _____________________________________ Time: 09:21:48 PM PST US Subject: Re: Europa-List: 914 Waste Gate From: Matthew Carpenter --> Europa-List message posted by: Matthew Carpenter On power on (to the TCU) my servo will open and then fully close the wastegate one cycle. With the engine off and the TCU on, I can advance my throttle from 0% up to110% and the servo will make small changes. When I look at the servo (the pully piece on the top), the cable connections and drops to the right hand side. When the servo moves, it turns the pully piece to the right. That loosens the cable and allows the spring to pull open the wastegate. If the gate is stuck (not in this case), then the cable will bow out at the pully piece. Hope that helps some.. Matt Carpenter Jim Butcher wrote: >--> Europa-List message posted by: "Jim Butcher" > >While doing full power tests with our 914, we have found that the manifold pressure stops at 30.5 inHg even at full throttle - 5800 rpm. Watching the waste gate lever from outside the airplane, we observe that the waste gate does not change position from idle (2000 rpm) to full throttle. > >Further, when power is applied to the TCU, the servo motor rotates about 45 deg towards waste gate closed, then rotates the opposite direction about 90 deg and then rotates in the original direction about 45 deg. In other words, the waste gate is not closed at power up with the throttle closed. If I adjust the cable so the waste gate is closed at power up, it will still attempt to rotate both ways as before and when it stops, I get a flashing red light. The servo does not change position when the throttle is moved from idle to 115%. I have checked the throttle position with the TLR46 program. By the way, TLR46 says the servo is at 50%. > >All these symptoms are with a new engine on initial run-in. I have double checked wiring and connections. Shane at Lockwood thought the servo motor was defective and I installed the replacement this morning with the same results. > >Can anyone make any suggestions or lend some trouble shooting tips? > >Thanks > >Jim Butcher A185 N241BW > >At airport trying to fly! > > > >