[neofitou]

been reading about planes lately, working for the airline I know people that are into planes, and I came across these


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.

[jonno_racing]

nice looking bit ok kit.

wonder what computer you would run.

[neofitou]

no computer.. thats the point. its just a fancy carby.

[jdk81]

how much are they?

[royce]

How would it cope with constant throttle changes?

Having a read you set a constant mixture level? it doesnt change for cruising etc?

[Joshyboy26]

^^ what he said. otherwise it sounds pretty sick!

[JrZook]

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

[neofitou]

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..

[wolf_rt]

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.

[want33s]

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.