---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Tue 01/13/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:54 AM - Re: Rejetting a 914 during Winter? (K Dilks) 2. 04:33 AM - Re: Re: Rejetting a 914 during Winter? (Graham Singleton) 3. 09:28 PM - Re: Rejetting a 914 during Winter? (darinh) ________________________________ Message 1 _____________________________________ Time: 02:54:10 AM PST US Subject: RotaxEngines-List: Re: Rejetting a 914 during Winter? From: "K Dilks" The carbs are jetted different left to right due to the airflow in the airbox not being uniform. dont mix this up with the pressure , just that the intake to the air box is on one side so the volume through the carbs is not exactly symetrical. Are you running an intercooler? What can happen is that at very low intake temps the fuel does not atomise correctly . In your case just check the fuel pressure is rising ( regulator is ok ) then observe the egt. Oh check the threeway solonoid valve which richens the mixture up at high power settings. You should hear it click on the ground if somone opens the throttle up , engine not running of course. This is situated on the airbox on all but the early engines. Cheers Kev -------- Austria ............. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=224448#224448 ________________________________ Message 2 _____________________________________ Time: 04:33:41 AM PST US From: Graham Singleton Subject: Re: RotaxEngines-List: Re: Rejetting a 914 during Winter? K Dilks wrote: > > The carbs are jetted different left to right due to the airflow in the airbox not being uniform. dont mix this up with the pressure , just that the intake to the air box is on one side so the volume through the carbs is not exactly symetrical. > Cheers Kev > > -------- > Austria ............. > > Kev that indicates to me that fuel injection would be a lot better ;-) Graham ________________________________ Message 3 _____________________________________ Time: 09:28:18 PM PST US Subject: RotaxEngines-List: Re: Rejetting a 914 during Winter? From: "darinh" Kev, I was running an intercooler but took it out today to check this...problem is still there. I have not checked the solenoid valve and will do so. My EGTs all read normal at all throttle settings except full but this is hard to determine as the rpm is fluctuating so much at full throttle. I did try to pull the choke to see if a boost of fuel would help the problem and it doesn't. Based on my Bing tuning manual, this is a method to determine if the engine is running rich. At this point, I am at a complete loss as to the root of the problem and it is very frustrating. I am half tempted to pull it off and put an IO-240 on regardless of the weight penalty... -------- Darin Hawkes Series 7 914 Turbo Kaysville, Utah Read this topic online here: http://forums.matronics.com/viewtopic.php?p=224667#224667 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.