From: Derek Dyer [] 
Sent: Monday, 24 January 2011 2:32 PM
To: Rotec Factory
Subject: TBI-40 / R2800 fuel burn

Hi Paul, Some fuel burn figures with the TBI on the R2800 radial.  The leaning feature really cuts back on the fuel burn in cruise.  Compared to the Bing which could not achieve this.  The top end power is fantastic. 




Litres per hour

Lean Cruise



15.5- 16

Full Rich Cruise       




Lean WOT




Full rich WOT      




The whole system is so smooth. Very happy

Regards Derek

From: Ron Shannon []
Sent: Monday, 17 January 2011 10:27 AM To:
Re: TBI suggestions

Engine: Jabiru 3300 Fuel System: TBI-40-S


I am very happy to report that I have the TBI running on my 3300 and overall, it's great and I'm very pleased with it.

After just a little bit of prime, it fired right up first time. After that, all I've had to adjust (so far) was the idle stop.

It runs great at idle as is so I've not bothered to fiddle with idle mixture. Interestingly, at static RPM, it puts out 130­150 RPM more than the AeroCarb with the same prop! Yay!

Much thanks, Ron Shannon
KitFox Lane WA 89382 USA

From: Bruce Lyn []
Sent: Thursday, 13 January 2011 4:22 PM
Subject: Bruce Knowles jabiru 3300 VH NZK  

Engine: Jabiru 3300 Fuel System: TBI‐40‐S

Hello Paul,

I fitted your TBI‐40‐S to my Jabiru 430 about 8 months ago and while at it I also fitted a new Sensenich prop to replace a damaged one. The replacement prop was identical to the previous. on first take off I was very surprised to observe the revs had increase dramatically to 3200 rpm when on the previous Bing set up would deliver about 2750rpm. That’s a big jump in performance, some 450rpm! At first I thought I had been supplied with the wrong prop but after careful examination, the prop checked out as having the same pitch and diameter as the previous. The increase in power had come directly from the addition of the TBI. It is advertised that a performance increase is to be expected but I did not expect to gain as much as I did. Full power performance and the resultant climb is much improved, and with the mixture control I simply lean off at cruise for best fuel burn. The increase in RPM has allowed me to add more prop and with that I dumped the Sensenich and purchased a bigger three Blade Bolly prop with more bite!

The Bolly Prop has allowed me to adjust it so that I can convert the new found HP in to usable performance. More power equals more fuel but the leaning capability of the TBI 40 design has allowed me to adjust the fuel flow back to a burn that the Bing simply could not offer.

I rang Paul at Rotec to tell him how impressed I was with the TBI. I am now looking very seriously at Rotec LCH liquid cooled cylinder heads as I believe the TBI fuel injection combined with LCH heads will make the ultimate Jabiru engine. As It stands now my heads temps do still tend to creep above acceptable limits on the warmer days. One step at a time so they say.

I would have no hesitation is recommending the TBI for the Jabiru engine, its brilliant.
Paul please feel free to forward my experiences to any potential customers you may have, you can also give them my email should they wish to discuss any aspect of the TBI.
Thanks again for wonderful product.

Regards Bruce Knowles

From: Calvin Thorne
Sent: Thursday, 14 October 2010 11:55 AM
Subject: RE: Calvin Thorne - TBI Questions


Thank you for the immediate response to my question. 

You folks have the greatest customer service and this is hard to find these days. 

Great doing business with you  and will try to send more your way.

Calvin Thorne
Cochrane Alberta Canada []
Sent: Tuesday, 12 October 2010 5:36 AM
To: Factory, Rotec
Subject: Jab 3300 with TBI!!

     First flight of my Sonex  with a jabiru 3300 and a Rotec TBI went off great!!! This engine NEVER ran like this!!! Having had some near deaths with the "brand A" throttle body and forever trying to get it to run sort of alright...the Rotec was awesome right from first start and gives me a solid 100 rpm gain on climbout with lower EGT (1100 tops)! I'm making significantly more HP and its smooth in every rpm range. I couldn't be happier with the choice I've made. I'll send some pics when the cowl comes off and till then enjoy a brief walk around!!

Dana Thurston

Dana also included this video of his Sonex: < click to play ...


Kitplanes Article by Steve Ells about Rotec's TBI. To open the pdf click on:

Performance Testimonials & More:

From: david mccandless []
Sent: Tuesday, 20 July 2010 11:00 AM
To: rotec factory
Subject: Funk R2800 installation

To the Rotec Team
I now have my 1946 Funk flying with the Rotec R2800 fueled with the Rotec TBI. It performs better that I ever imagined.

The whole installation turned out to be a very pleasing exercise in aircraft home engineering. There were minor glitches along the way and the Rotec factory support in solving those glitches was most appreciated.

When I got myself into a hole (almost literally !) with the lubrication system due to my own stupidity, the factory came up with a positive 'can do, can fix' solution that has culminated in a vast increase in my knowledge of, and confidence in, my R2800.

The TBI is not a complicated piece of equipment, but it still must be installed and tuned correctly for satisfactory performance. The fact that Paul was always available on email or at the end of the phone for advice made the whole installation a simple series of steps.
Timely backup with improved components, supplied free of charge along the way has left me with a feeling that Rotec were interested seeing my Funk project through to a successful conclusion and that it was not just 'another engine sale'.

Please feel free to refer any potential customers to me should they wish to discuss any aspects of my engine fit experience.

With my best regards and thanks,
Dave McCandless
email :
08 9295 0685

Download the above testimonial as pdf:

From: Martin Hone []
Sent: Wednesday, 23 June 2010 11:45 AM
Subject: Re: TBI working great.

Paul, I spoke with one of the local flyers on the weekend that is looking at putting one on his
Lycoming O-320 powered BD4, so I can just say pretty much what I told him..............

When I fitted the Rotec R3600 into the prototype Spacewalker II - RR, I was originally going to
keep things simple and use the supplied Bing carb. As it turned out, I had a tuning issue with the
Bing, so it justified ordering the TBI unit before the first flight. While I therefore cannot make a
direct comparison between the Bing and the TBI, I have found the TBI to be very simple to
maintain and tune, with the very real advantage of being able to adjust the mixture in-flight. This
feature alone makes the TBI a worthwhile purchase, allowing optimum engine performance at
various altitudes, and saving fuel. On a recent cross country flight over 14 hours duration, The
R3600 was consistently taking on less fuel at each fuel stop than a friend's Rotax 912-powered
J6 Karatoo. We were travelling at the same speed, so the R3600 was loafing, but we were both
amazed at is economy of 18.1 litres per hour (4.8 US gallon per hour). As soon as the carb on
my Lycoming O-320 powered RV gives trouble , it will be replaced by a Rotec TBI immediately.

Martin Hone.

From: Mike Custard []
Sent: Saturday, 10 April 2010 2:54 PM
To: 'Rotec Factory'
Subject: Rotec TBI Vs Marvel-Schebler

Hi Paul,

I finally got the chance to fly with the TBI (0-200) and I have attached the
comparison sheet. Idle, throttle response and overall engine performance was
very good.

Mike Custard


Marvel-Schebler Carburetor VS. Rotec TBI-40-3 Throttle Body
Injection on a Continental 0-200 powered Kitfox

With Marvel-Schebler Carburetor

2400 16.9 5.1 1082 1120 1283 1229
2500 17.7 5.6 1079 1119 1309 1262
2600 18.2 6.2 1084 1117 1288 1266

With Rotec TBI-40-3 Throttle Body Injection

2500 17.5 4.5 1210 1285 1236 1265
2600 18.2 6.2 1218 1300 1261 1279

@5000MSL, 45F OAT, Dynon D-180 EFIS/EMS

Performance Testimonials & More:

From: Lynn Matteson []
Sent: Tuesday, 10 November 2009 1:19 AM
To: Rotec Factory
Subject: Engine stoppage during takeoff

Hi Paul-

The TBI-40 that I bought from you at Oshkosh has been running great on my Jabiru 2200 engine.........

Thanks again for the suggestions, and keep up the good work. Several people have mentioned to me that they got good advice from you regarding their installations. Good show, mate!



Performance Testimonial

From: Nick Coleman []
Sent: Tuesday, 6 October 2009 9:38 AM
Subject: TBI Install on O-320 Swick-T pictures

G'day Paul,

As promised here is some pictures of my TBI install on my O-320 powered Swick-T.

When I first got the TBI out of the box I thought there is no way this thing can work very well. It is too small, too light, it did not cost me an arm and a leg, and there is only two moving parts.

However, on a leap of faith I pulled off the piece of #$@$%* PS-5C pressure carb that I have run for years and set about installing your TBI. I was completely shocked when the engine started on the fourth blade on the initial start.

I have about five hours flying it now and I cannot be more pleased. It starts right up every time, hot or cold. My engine runs smoother and quieter than it ever has. I do not have the specific numbers yet, but I am using a significant less amount of fuel per hour.

While doing aerobatics in a practice box my ground observer even noticed that my engine seemed to running be much quieter and smoother than it had in the past.

I cannot tell you thanks enough, it just works great.

If you have any customers looking for recommendations please feel free to have them contact me.

Thanks again,

Nick Coleman

Photos of Nick's Installation

Please click on each thumbnail to enlarge then when done close the window to return here
TBI for O320...TBI Install
TBI on Swick ToTBIw
Please click on each thumbnail to enlarge then when done close the window to return here.

Performance Testimonial

Lynn Mattison's Comments on Performance & More (Jabiru + Rotec's TBI-40-S)
Lynn's Comments are posted on the Matronics Forum.

Lynn Matteson
Kitfox IV Speedster, tail dragger
Jabiru 2200, #2062, 727.5 hrs
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Rotec TBI-40 injection

Extract #1: On Mon Aug 03, 2009 Status: Rotec TBI success story underway

I bought a Rotec TBI-40 mechanical fuel injection system while at Oshkosh, and spent the last 3 1/2 days making the throttle control bellcrank, the air intake tube adapter, and the fuel line, and after all checks and double-checks, I fired her up.

The TBI performed as advertised....right out of the box.

The first flight will come tomorrow. As advertised, this thing will not drip fuel like the other well-known Bing replacement on the market. Nothing against them, but I am VERY happy I made the far, anyway. Flying might be another thing, but so far, so good

Extract #2: On Aug 10, 2009 Status: TBI installation done...tests flights underway

... the addition of the Rotec TBI-40 mechanical fuel injection system will enable the pilot to control the EGT's rather well. I've been test flying mine over the last several days, and I've seen EGT's as close together as (today's flight) 41 degrees F., and CHT's as close together as 7 degrees F. It's nice to be able to adjust the mixture with this device, and also to see the fuel flow read down as low as 2.9 gph at about 80 mph ground speed into a 12 mph wind at 2700 rpm.

I've been playing with "lean off peak" with this device, which is one reason that I bought it. It amazed me that you can see the EGT's go down after reaching peak temperature....I was a skeptic as first, but if the engine lives, I'll be a believer. Even without the ability to go lean of peak, just being able to adjust the mixture on the fly is worth the added workload on this pilot during takeoff and landing.

=== End 2 Extracts

Client to Rotec Interface/Dealings

Don and Dianne Have been Rotec clients since 2004 purchasing a Rotec engine and accessories.

From: Donna Warner []
Sent: Tuesday, 8 September 2009 5:32 AM
To: Rotec
Subject: Rotec Factory - Product, Management & Support

Don & Dianne Usher

Hi - Our name is Don & Donna Warner

We manage "Team Luscombe" ( ATC-694 Holder ). We Restore, Repair and Custom build Luscombes. Currently we are replicating a 1938 Luscombe model 4. You can view our project on the Rotec web site, Home page / Warner model 4.

We started this project because of Rotec's new R2800 engine, and after talking with Paul at "Sun-N-Fun" and seeing their demo aircraft, a Kit Fox, We were sold on the engine and the people that produce it.
We ordered the engine and included their exhaust system and propeller. Factory designed equipment saves many hours in production and evaluation. Rotec has already engineered everything to work together. No trial and error.

The Factory support we have received from Paul and Jim has been excellant. They are quick to respond to our technical questions and any problems that came-up they have resolved fairly and to our satisfaction.
Our parent company, Luscombe Silvaire who build the new LSA Luscombe's, has just completed a Rotec R2800 installation also, its called the Phantom II. It performes perfectly and has already appeared in Plane & Pilot, June 2009 issue.

As business managers, We appreciate working with other business people that have a good product, present it with pride and are always willing to take care of any problems that may arrise.

Rotec is a great company. They have a teriffic aviation product, conduct their business professionally and treat their customers friendly, fairly and above all with respect.

Don & Donna Warner
Team Luscombe
Donna Warner <>

Bill Pokes has been dealing with Rotec since 2004 purchasing an engine and accessories...

From: bill []
Sent: Wednesday, 9 September 2009 3:39 AM
Subject: RE: Rotec Factory support


I am flying the Rotec 2800 on my Kitfox. I am beyond happy with the engine and the support provided by The Rotec Staff. I was fortunate to have been at this years Airventure at Oshkosh and met Paul Chernikeeff.

I was great to put a face with a name.

Regarding support:

When I have had a question, the Rotec staff has responded in less than 24 hours. I sure wish all suppliers were as responsive.

This engine is a Contemporary Radial Engine which Starts immediately, runs smooth, has incredible sound, great looks and draws a crowd wherever I go. I have flown a number of Kitfox aircraft and the performance with this engine is astounding. The acceleration on takeoff pushes you back into the seat cushions. I gave a ride to a long time Kitfox owner last week and his comment after takeoff was “ WOW”. I am swinging a 76” x 55” prop- which was what Paul suggested - and the performance is just what we were looking for.

At Gross with 4500’ density altitude ( the ride previously mentioned) we were climbing at around 1200 FPM. The long prop required longer landing gear legs, but I understand a 3 blade prop is available. If anyone has any questions please feel free to call or email. The Kitfox is at Chandler Arizona Airport ( KCHD). I will be glad to show it to you.

Best Regards and Thank You Paul for all of your continuing help and support.
William Prokes
Tile Signs and Graphics

From Jake Shultz - please see the link to Jake's page...

My interaction with ROTEC has been a stellar experience...
My engine has only recently arrived so I have not yet mounted or ran it, however the interaction and support from ROTEC has been wonderful.

From the very first call to the arrival of my engine, they have answered all my questions and have been very professional. The passion and pride that they hold for their product is evident to me.

The engine sits on my shop floor looking like a piece of fine sculpture.

I would have no hesitation in recommending a purchase...


Francis (Joe) Meyeres - Client since 2004 purchasing and engine and accessories.

From: Francis L Meyeres []
Sent: Wednesday, 9 September 2009 11:24 AM
To: Rotec
Subject: Re: Rotec Factory support Comments

I have a Kitfox Classic IV with a Rotec R2800 on the nose. I can't tell you how much I have enjoyed that engine since I first got it.

The folks at Rotec have been absolutely outstanding to work with any time there has been any questions or issues that have arose.

If you are thinking about purchasing a Rotec and are concerned about their support... put your mind at ease. These guys have a great product that runs smoothe, sounds outstanding, has plenty of power and absoulety has all the asthetic qualities the others wish they had.

Guarenteed you will not draw a crowd to look at your new "Brand X" motor like you will with the Rotec Radial!

Joe Meyeres

...need more testimonials? Please contact Rotec Administation

Wish to add a testimonial? Please contact, or submit copy, to Jim on the arrow to go back to the top menu back2top