Mailing List flyrotary@lancaironline.net Message #2867
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] turbo wastegate requirements
Date: Wed, 10 Sep 2003 20:37:53 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hi Paul,
 
    I have turbocharged automobiles (two of them) in my short life span, so I know a little bit about turbo, but not an expert by any means, however, I would not under any circumstance even have that device active in my airplane much less let it control fuel to a engine under boost.  If it killed your ignition instead of your fuel it still be a bad idea (IMHO), but at least then you wouldn't risk damaging your engine from lean fuel induced detonation. 
 
I for one don't want any computer or other device deciding when to pull back on the power, you could find yourself in a situtation (say a mountain in your face - well, not likely in Florida, but you know {:>)) where you could care less about 1 psi overboost verus getting over that ridge line.
 
I am surprised that anyone designing a EFI for a turbo would use that method, but I guess they do on automobiles, but I wouldn't on an aircraft.
 
FWIW
 
Ed Anderson
 
----- Original Message -----
Sent: Wednesday, September 10, 2003 9:31 AM
Subject: [FlyRotary] turbo wastegate requirements

Hi, fellow canardians.  I am still sitting on that fence between turbo or not to turbo. (I have some splinters in my butt cheeks from that fence).   I was reading the installation and operation manual that came with my MicroTech electronic engine management system, and under "setting up" there is a section entitled BstCUT,  which says "This feature prevents turbo engines from overboosting by cutting all fuel supply when bost pressure exceeds the limit set in theBSTcut screen, i.e:  if you set this value to 10 psi, all fuel supply will be immediately shut off when boost is 11 psi or higher."  Does this sound like a useful tool in installing and setting up a turbo on my 13b?  Please don't flame me, as I know less about turbos than I know about understanding women.  Does this mean I would not need a wastegate?  Thanks in advance for your replies.  Paul Conner, Mobile, AL
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