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  #1  
Old 04-16-2010, 08:38 AM
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ratc ratc is offline
 
Join Date: Jan 2006
Location: North Yorkshire UK
Posts: 152
Default Rotec Engineering TBI ?

Whilst Looking at alternatives to carburettors and FI on Lycoming 320 engines I came across the Rotec TBI.
Has anyone used the TBI 40-4?
It appears to be the only one which is approved for mogas (which has great appeal to me). Not to mention that it looks beautifully engineered.

For those who have gone before the pros and cons of TBI operations and installation would be useful. Thanks.
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  #2  
Old 04-16-2010, 07:13 PM
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Snowflake Snowflake is offline
 
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Default

I'm interested in this as well, i'd be considering it for an RV-6 though... Also an O-320. E2D, if it matters.
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  #3  
Old 04-16-2010, 07:45 PM
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N941WR N941WR is offline
 
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Try searching on "Rotec TBI". At least one RV builder was installing it when they first made this announcement last year.

Not much has been said about it since.
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  #4  
Old 04-16-2010, 09:05 PM
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petehowell petehowell is offline
 
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Default I have one....

I have been flying too much to take the time to install it. Probably next annual.

RocketBob has one for his -6 and is further along on the install. Maybe he will chime in.
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  #5  
Old 04-16-2010, 09:59 PM
Dmadd Dmadd is offline
 
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Location: Camas, WA
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FWIW
a pal put one on his O-320 powered Swick Taylorcraft. We took my RV-4 FAB and copied it for the install. He LOVES the thing. Gets way better fuel economy than the pressure carb that came off the airplane. Idles better, and runs better.
Really neat design. Uses nylon gaskets for the slide, and the fuel metering is done with a really unique and incredibly simple design. I'm going to put one on the four as soon as the marvel dribbler needs a rebuild...
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  #6  
Old 04-17-2010, 12:03 PM
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ratc ratc is offline
 
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Smile Rotec TBI

Dennis, thanks for the input, it does sound promising!
You have answered one of the questions I've posted to Rotec regarding the use of the Vans FAB. No rush, but if there is any chance of a photo of the FAB modification/installation it would be a useful reference.
More importantly having seen one do you think there will be any major issues fitting it in/under the -4 standard 0-320 cowls?
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  #7  
Old 04-17-2010, 01:48 PM
Tony Spicer Tony Spicer is offline
 
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Location: Wilmington, NC
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Quote:
Originally Posted by Dmadd View Post

Really neat design. Uses nylon gaskets for the slide, and the fuel metering is done with a really unique and incredibly simple design. I'm going to put one on the four as soon as the marvel dribbler needs a rebuild...
Yep, it's unique. Ben Ellison has been building them for over 25 years. Patent ran out. The Rotec is a copy.

http://www.ellison-fluid-systems.com/

Tony
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  #8  
Old 04-17-2010, 06:07 PM
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rocketbob rocketbob is offline
 
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Quote:
Originally Posted by petehowell View Post
I have been flying too much to take the time to install it. Probably next annual.

RocketBob has one for his -6 and is further along on the install. Maybe he will chime in.
Got the cable brackets and spacer made, but have hesitated to put it on since I could not get adequate test time this winter before making a few long trips in the RV. I just got back from SNF so I've got no more excuses... Its hard sometimes to start modifying a perfectly good flying RV that runs like a watch. The other side of it is I want to make a few more 'before' test flights to validate the data I've already captured in order to properly validate my testing with the Rotec. Stay tuned.
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  #9  
Old 04-20-2010, 04:12 AM
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ronschreck ronschreck is offline
 
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Quote:
Originally Posted by ratc View Post
Whilst Looking at alternatives to carburettors and FI on Lycoming 320 engines I came across the Rotec TBI.
Has anyone used the TBI 40-4?
It appears to be the only one which is approved for mogas (which has great appeal to me). Not to mention that it looks beautifully engineered.

For those who have gone before the pros and cons of TBI operations and installation would be useful. Thanks.
Airflow Performance FI is also approved for mogas.
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