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Aircraft Throttle Body Injector to replace carbies.
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Author:  neofitou [ Fri Mar 23, 2012 9:10 am ]
Post subject:  Aircraft Throttle Body Injector to replace carbies.
been reading about planes lately, working for the airline I know people that are into planes, and I came across these

Image
http://www.rotectbi.com

These are stand alone TBI units designed specifically to replace carbies.
They have a slide throttle control rather than a butterfly valve, no float, only need .5 psi fuel pressure and are availiable in a few sizes.
It dawned on me that they arent too expensive this would be the perfect replacement for anyone using a carby.

a bit of reading on thier site and:
Quote:
A Rotec TBI can be, and has been, used in a motorcycle - or for that matter there is no reason why it can't be used in a car!


I think they could be great, but somone else will have to try it. I have EFI now. but I wanted to put them out there so ppl know about them.

Think of all those cheap G16A engines availiable with one on, how easy the conversion could be for Sierras.
Author:  jonno_racing [ Fri Mar 23, 2012 10:21 am ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
nice looking bit ok kit.

wonder what computer you would run.
Author:  neofitou [ Fri Mar 23, 2012 10:49 am ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
no computer.. thats the point. its just a fancy carby.
Author:  jdk81 [ Fri Mar 23, 2012 11:33 am ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
how much are they?
Author:  royce [ Fri Mar 23, 2012 11:41 am ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
How would it cope with constant throttle changes?

Having a read you set a constant mixture level? it doesnt change for cruising etc?
Author:  Joshyboy26 [ Fri Mar 23, 2012 12:11 pm ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
^^ what he said. otherwise it sounds pretty sick!
Author:  JrZook [ Fri Mar 23, 2012 1:24 pm ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
royce wrote:
How would it cope with constant throttle changes?


One foot to open the throttle, other foot to alter the mixture?

Be interesting to see how they set it up on a bike and how well it ran
Author:  neofitou [ Fri Mar 23, 2012 1:26 pm ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
yeah, as in all aircraft carbies you can adjust the fuel mixture from within the cabin (adjustable jets?), with a knob or lever.

I think the main issue would be if you can set it up for extra squirt of juice on acceleration (replacing the accelleration pump in most carbies setups)

Quote:
"The Rotec TBI-40, unlike the others is not a carburetor, it is in fact a mechanical fuel injection system, that self meters fuel supply by use of a cleverly calibrated negative pressure fuel regulator. This in effect continuously compensates for any variations in fuel pressure and or power requirement."


I did see earlier today that another similar brand was being used on some "RVs" in the states on some random forum.

I guess we would have to talk to them and ask them, the do say on thier site it would work in a car..
Author:  wolf_rt [ Fri Mar 23, 2012 7:20 pm ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
the adjustable mixture is only relevant to altitude changes though, on a car it would be set and forget. (unless you wanted to leave a in-cab mixture lever for small altitude adjustments or different fuel)
You don't change the mixture when adjusting rpm in an aircraft, the carb/whatever handles that, only when climbing or descending.
Small Aircraft engines have good throttle response.
Author:  want33s [ Fri Mar 23, 2012 7:25 pm ]
Post subject:  Re: Aircraft Throttle Body Injector to replace carbies.
The idea of mixture adjustment isn't so critical in a single engine plane but is hugely important in a twin engine as mixtures are adjusted according to exhaust temp to reduce yaw and vibration.
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