[Diy_efi] tiny injection

[Santi Udomkesmalee]

I didn't really think RC nitro engines needed to be injected, nor did I 
think it would really help performance.  I just thought it might be a fun 
little project, and provide some serious bragging rights.  Also, they are 
starting to make four-stroke Nitro engines, and I thought it might be kind 
of cool to have an injected one of those.

I think making a turbo would be quite hard since I don't think turbines that 
small are easy to come by.  But this makes me want to design and build a 
small belt driven supercharger.  Does anyone out there have any experience 
fabricating superchargers.  Anybody want to point me to some books?  Is 
there any way to make a super charger without having to cut extremely 
complex compressor wheels or blades (I unfortunatly don't have access to a 6 
axis cnc machine)

-santi


From: "MarkoNTL" <marko.cosic at ntlworld.com>
>Reply-To: diy_efi at diy-efi.org
>To: <diy_efi at diy-efi.org>
>Subject: Re: [Diy_efi] tiny injection
>Date: Mon, 24 Jun 2002 20:03:17 +0100
>
> > Try making a turbo for your Nitro engine before injecting it.  These
>things
> > are so simple that you can't inject them.
>
>The cars are usually '15' engines, or 0.15 cubic inches. "Big" model plane
>enignes are in the 1.4 to 3 cubic inch range. Do turbos exist for things
>that size? Cras theres little merit in injecting as they're always hard on
>throttle and hard on brakes and sod any low-mid range. Planes OTOH where
>fuel is heavy and limits duration, and where you're likely to 'cruise' on
>part throttle the Efi would be advantageous. They're not as 'small' as 
>you'd
>imagine mind - my bro's OS 46 uses 300ccs of fuel every 10 minutes, small
>but thirsty so injectors may not be a problem after all. Best has to be the
>model jet turbines though... ...a litre of jet fuel in 6 minutes and 150mph
>top end. :)
>
>
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