injecting a *small* engine

[August de Heij]

Hi Paul,
thanks for your reply.
I have a few remarks tough:

>  Since it is on such=
>  a small scale you will having trouble getting sensors and injectors to run=
>  at such low increments.

As I said, it has been done by the Tippa fuel economy team. So there 
must be a way. Nothing personal, but I want to hear all there is 
before saying it's a no go on EFI.

>  since it is OHC engine I presume its a 4 stroke. Have you tried to get it=
>  cam'ed. Do things like port it and increase the compression ratio. Crank=
>  the timing forward and use a proper race carb. These mods will yield more=
>  power than EFI will give you.

The head has been flowed/tuned (whatever you call it) I've fitted an 
advancing flywheel and put the timing forward. A Keihin 19mm takes 
care of the fuel delivery. The standard airbox is replaced for a 
sports filter. An oilcooler from a citroen 2CV is fitted. 70 cc can be 
used for 4- strokes in the moped races here to be a bit more 
competitive to 50cc 2-strokes.
I'm currently adjusting the piston for higher compression and will 
build a lighter clutch assembly soon.
The speed was over 100 km/h. I'm going to get a race cam from Japan 
and some other stuff so it's going to get faster. 
I'm planning to build the Digital distributorless ignition system if 
any of you can tell me it's good. I think it is. So maybe EFI is just 
a wild guess, but if I can do it ,cheap, then I will, just for the 
challenge. Was thinking of turbocharging too, but that would be a 
hell of a challenge :-)
Looked at your page. A 2-stroke minibike is still a different story. 
After seeing it, I would not feel so safe driving it around 100 km/h 
Adjusting a whole bike takes a lot longer to do properly (brakes, 
etc..), which you already know, ofcourse. Your mini-bike is just for 
fun. Time, work, some money and ofcourse some help from other 
enthusiasts can help build a race bike. That's why I have contact 
with fellow 4-stroke moped racers in The Netherlands and the United 
Kingdom and plan to organize a 4-stroke moped racing association.
And why I called upon DIY-EFI.

August.