I haven't been following the email chain but the thing that pulled me in at the end of Mark's note was about aerocarb vs. ram air. I removed the ram air during taxi testing on 357cj as it started to lean out right about lift off speed and stumble, sometimes stall the engine. I changed to completely pulling air from inside the cowl and it was cured. Eventually carb heat was added to the filter box and I was still able to have a rpm drop with engaging the carb heat and it also made a significant difference in high altitude cruise settings. I would strongly recommend staying away from ram air with the aerocarb/aero injector fuel metering devices. joe Horton, Soon to have a plane flying again....
-----Original Message----- From: Mark <m...@n56ml.com> To: krnet <krnet@list.krnet.org> Date: Saturday, 5 November 2022 12:23 PM EDT Subject: Re: KRnet> ram air....potential issue! I reread my Jim Hill website, and it was a Posa that Jim was running when the ram air caused the engine problem. It was replaced by a Revflo, which ran fine, as I recall. The Revflo does have a good reputation. The Posa, on the other hand, is a POS. Enclosed is the page from the 1990 Ellison manual, which talks a lot about the possibility of feeding the TBI vapor and causing problems, but nothing specific about cooling the TBI itself. I could be wrong, but I believe I'd heard nothing about vapor lock issues until I experienced it myself with my EFS-3, and in troubleshooting, I tried the blast tube on the diaphragm and it worked. Maybe I got that idea from somebody else, but it did cure my problem, and Mark Jones' problem as well. It is a real issue, and failure to address it can lead to unhappy results. See enclosed page from the 1990 Manual, which I believe is the manual that came with an EFS-3A that I bought off ebay, along with a purchase agreement between Ellison and Craig Williams, the original purchaser. That EFS-3A is destined for N891CJ, which is currently running an Aerocarb. it is worth mentioning that the Aerocarb doesn't seem to mind ram air, and least not on this installation. Not that I'm recommending the Aerocarb at all..... Mark Langford m...@n56ml.com http://www.n56ml.com Huntsville, AL -- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
-- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
