Fuel injection for model cars?

[SHY]

Why not move on technology-wise also for fuel track classes?

Easy, more runtime, more power, less breakage...

We could have a standard EFRA item?

[mark christopher]

Originally Posted by SHY

Why not move on technology-wise also for fuel track classes?

Easy, more runtime, more power, less breakage...

We could have a standard EFRA item?

cost would be the problem

[SHY]

Why?

A fuel injection system would not cost much I think. And should be very long lasting. Advantages would be:

-less consumption = you don't need a suitcase full of engines just in case
-LOWER costs, as you keep the engine temperature stable = less overheating & breakage
-more power = you don't need a super hand tuned engine

Look at the A mains of 200mm and 1:8 TR - in the EC or WC - not even those guys can keep the engine running for 45 or 60 minutes. Or make a 5 minute qualification run... very often these days the lucky ones win, not the best drivers...

C'mon... for electrics we now have brushless and lipo, it's time to move on also for fuel classes. Those carburettors are vintage!!!

[_JP_]

maybe they need to run Sirio

[SHY]

I've done some googling:


From the manual:

Wouldn't it be great if your mechanic could tune your engine perfectly every time, and you wouldn't have to worry about whether or not your engine was too rich or too lean? Even better, wouldn't it be great if your mechanic could ride along in your model, and adjust it for different conditions that would allow the engine to accelerate and perform better? Sounds like sci-fi stuff ? Enter PC/RC.

PC/RC has been manufacturing hobby electronics such as the Digi-Temp digital temperature probe and Digi-Tach tachometers for years, and realized that if they could put all of that technology into one magic box and add a little software, a system could result that could automatically tune your R/C gas engine. After more than a year of testing and development they had a product dubbed the Electronic Fuel Regulator, or EFR, which was light, performed as expected, and had minimal draw on the battery pack.

Now the average or expert racer can have his engine tuned precisely, while in the heat of the competition, and without worry. How does it work? Think of the EFR as fuel injection. Simply stated the EFR consists basically of three parts - the valve, the controller, and the sensor. The sensor transmits information back to the controller, and tells the valve the proper amount of fuel to allow, based on the carburetor opening. The carburetor opening is sensed via the servo output from the receiver.

Installation Pick a suitable location for the processor, and mount it securely. A small hole is necessary in the exhaust manifold, about 1/4 inch (6mm) from the mouth of the manifold where it attaches to the engine.. The valve simply installs in the fuel line between the fuel tank and the carburetor inlet. Now plug the unit into the receiver and plug the throttle servo into the controller and you are ready to program.

Why is the engine running at a cooler temperature? With manual tuning, a mechanic is trying to find a compromise between two needle valves. The transition from low to high requires a richer setting in the middle, to overlap and a leaner setting on the top needle. This leaner setting on the top is what causes most high temperatures, and premature engine failures. Using the EFR is like having many synchronized needle valves, and since they are not compromising, the results are settings which are more precise and not as lean; therefore cooler.

Another thing which has been observed and could be very important to many drivers is the ability to spot a problem before it becomes a bigger problem. If the engine has been running fine and then suddenly starts to run richer and richer you can bet that the rod bearing or something is going bad inside the engine. In testing there was enough advance warning that complete piston/sleeve replacement was avoided by a simple change of the rod. How many good engines will this save? There will also be an occasion when the unit fluctuates between rich and lean. A check of the fuel tank for leaks or the muffler coupler for rips will usually find the culprit.

The biggest difficulty with gas R/C is the inability to get engines to run right. Some have actually quit altogether because of the frustration of trying to tune the carb or finding a mechanic that could tune it well enough to be competitive. Using an EFR is going to change all of that. The EFR, with its enhanced car programming, will extend the life, and increase the performance of car engines as no product has done before. This same thought process is exactly what R.O.A.R. saw as a good enough reason to approve the product for racing.

The future is here and your radio-controlled model can now benefit from a technology that will not only increase your enjoyment and satisfaction, but ultimately improve the hobby.

EFR 801 benefits are :
Optimum mixture throughout the varying throttle setting
Improve fuel management
Reliable engine performance in varying weather conditions
Consistent performance throughout operation
Increase engine life
Automatic shut down on power failure
No adjustments necessary
Maximizes performance
List Price: US$159.95

http://www.rctech.net/forum/nitro-ro...injection.html

http://forums.radiocontrolzone.com/s...ad.php?t=26997

Seems like they stopped selling it in 2002 due to licensing problems:
http://www.pcrcproducts.com/news.html


O.S. made fuel injection for model engines back in 1999:
http://castlehillhobbies.com.au/comp...mart/Itemid,1/

http://www.os-engines.co.jp/english/...0sfi/index.htm

http://www.singahobby.com.sg/osm01.html


From Conley Precision Engines:
http://findarticles.com/p/articles/m...g=artBody;col1

http://www.conleyprecision.com/products.htm

[Gayo]

So it's not available any more? What a shame

I remember a few years ago (10 maybe?), an 1/8 RC driver was using a personal device with a small servo and a temp probe. The inboard system was adjusting the main needle permanently so the motor was never too rich or too lean - Ace! Maybe it was an EFR?

An innovative company like Traxxas or Orion should really make a system like this

[mark christopher]

Originally Posted by _JP_

maybe they need to run Sirio

and illegal pipes!!

[mark christopher]

Originally Posted by SHY

Why?

A fuel injection system would not cost much I think. And should be very long lasting. Advantages would be:

-less consumption = you don't need a suitcase full of engines just in case
-LOWER costs, as you keep the engine temperature stable = less overheating & breakage
-more power = you don't need a super hand tuned engine

Look at the A mains of 200mm and 1:8 TR - in the EC or WC - not even those guys can keep the engine running for 45 or 60 minutes. Or make a 5 minute qualification run... very often these days the lucky ones win, not the best drivers...

C'mon... for electrics we now have brushless and lipo, it's time to move on also for fuel classes. Those carburettors are vintage!!!

not cost much?
so you need

fuel pump
throttle body
injector
some form of meetering device
electronics if its not a mechancial system

ok so you ot £50 for a carb, you do that for the same money

Originally Posted by rcluke

you can get an intercooler for rc cars

not much point unless your fitting a turbo!!