Whats the quote for casting?

Those prints look pretty good, what printer are you using? We use an Ultimaker 2 at work, I have a Prusa Mendel at home which works alright but is not as precise as the Ultimaker.

Manifolds printed

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  quad 01.jpg (11.10 KB)

Drawings done for simple quad bike carb setup, will print soon and design the linkages once the carbs are sitting in the engine bay

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  dtc2.jpg (15.78 KB)

Depends on the plastic, ABS is not so great with petrol (paraffin solvents), PLA is not so good with ethanol (alcohols). You could paint it with an appropriate epoxy. PLA softens at 60-70°C so not really suited to that type of job. Which is why I'd say supercharger said he'd get them cast.

How well does the plastic hold up to fuels?

Love the idea of printing intakes that would otherwise take some expensive machine work to accomplish.

DD,
ECU is just in case he uses kits for later cars as there are now plenty of metro kids with little fwd rides that want a simple kit for boost. I Agree keep it simple, keep if for us and keep them carby.

Sounds like a plan, the mini manis would be small and easy to sell in japan for cheaper than those rip off versions. Yeah sorry those chargers are ogura tx.

As far as I know there are no Japanese kits for amr500's, the ones you mention are not for amr's

I like designing with parts that are readily/cheaply available. The bike carbs im using are 34mm, so they are ideal for twin/triple or quad setups.

Adapters allow for cheap setups as you retain your standard factory parts, manifolds...etc

Any setups are a possibility....adapters/manifolds...etc using whatever parts are available.

You want it, there's a good chance I will consider producing it

Why would an ECU be a challenge? Bike carburetors don't use an ECU.

What kind of plastic is the adaptor? Fuel resistant?