Throttle Body

[Snappy]

Ok, I'm on my 2nd Sp-4 and it's well on it's way to wearing out.  Anyone tried an ellison with any success?  I once flew a VW with a Posa carburator and yes, it did work but was NOT an aircraft carburator.  What about the Ellisons?
Snappy

[Bruce Hughes]

Hi.   I do not have experience with the Ellison but I recently
changed engines to an O-320.   As I had to go to a new carb or ..
I chose the Ellison.

Why?   I believe that I will have significantly less problem with
icing; I am in western Washington state which tends to be wet
or VERY wet.

They tried to design it to get more even distribution of fuel/air
but it does not seem to be better than carbs.

Get fuel injection if you can afford it.   Otherwise the Ellison is
a good bet.  

Bruce Hughes

[Snappy]

I visited Ellison in Renton, WA yesterday and was very well received by Chris, a 20 year employee.  I was literaly taken for a tour of the facility, and shown all the fun stuff and projects.

One of their test beds is the owners  VERY nice Long Ez and it is on this aircraft that they developed the intake system for Longs.  The install is very professional and well thought out.  However it DOES NEED HEAT!.

You need to build a plenum that houses a K&N Air filter with enough CFM's to keep your engine breathing well.  They have one, but I didn't get the number.  The plenum maintains an even flow/pressure of air into the K&N and must be heated because of the tendency for moisutre to acccululate and turn to ice in low temps.  The scat tube off the exhaust will work due to the pressure differential between ambient cowling and the low pressure within the plenum.

Ellison also sells a 90degree cast aluminum TBI mounting box that will take the air/fuel mix from the horizontally mounted TBI up into the intake tubes and it is recommended highly.  I was going to use a 90degree sweep to 'bend' the air but the box adds additional mixing AND reduces impulse pressures.

Overall I was very impressed by the quality of design and workmanship on the Long as well as the TBI setup.  Nice work!

I think that the complaints of the Ellison being 'finiky' and hard to properly jet are due to incorect installations and using ram air to increase the pressure at the throat.  This application just doesn't work with the TBI.

I'll keep you advised as I progress.

[skyrocket]

Has anyone tried the Aero Carb sold by the Sonex people? They list one for an 0320. Does it work??

Thanks

[spy]

dont buy the sonex aerocarb,, its cheap because it is cheap..very hard to tune and ..i almost got into an accident..when the "slide" got stuck while flying..   it " binded,,,, had to do a POWER OUT LANDING  FOR THE FIRST TIME.,,,>> after i modified so many things to TRY make it work RELIABLY ..IT DIDNT !!  .getting a new marbel schebler...turned me back to a happy ,safe amd confident flyer....  stay safe !!

[Hmanvel]

A local EZ flyer also experienced binding with the Aerocarb.  Doesnt sound like it's ready for prime time yet.

[skyrocket]

Thanks for the info on the Aero carb. I was not planning to get one, just checking options. Looks like that one is not one to consider. Got to admit the idea looks good, to bad it doesn't work as good as the pictures look.