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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: sammypro.com on July 14, 2009, 01:13:43 PM

Title: converting a swift mfi to carb?
Post by: sammypro.com on July 14, 2009, 01:13:43 PM
What would I need?

computer from carb'd 1.3, distributor from carb veh, Universal 12V fuel pump, fuel pressure regulator, carb w/ install kit (oviously), .........anything else?? ???.

note. customer sourced a motor from a swift to install in a light boat. He only bought the complete motor. He wants to run a weber carb...etc. He did not purchase any harness, computer, or distributor. ANY HELP WOULD BE COOL.
Title: Re: converting a swift mfi to carb?
Post by: fordem on July 14, 2009, 02:02:13 PM
Hop over to www.teamswift.net and ask the question there.

There's no computer on my carburetted 1.3 Swift - so I'd say you need the carburettor - anything that works with the 1.3 Sammi should be good - intake manifold to match (or manifold adaptor), distributor and a low pressure fuel pump (2~4 psi), or a pump with regulator.

Depending on which distributor you get (there are several) you may also need the ignitor - my distributor has the ignitor built in.
Title: Re: converting a swift mfi to carb?
Post by: Rhinoman on July 14, 2009, 03:19:23 PM
You don't need a computer for a Weber, use the dizzy off a carb Sammy with a low pressure fuel pump.
Title: Re: converting a swift mfi to carb?
Post by: ebewley on July 14, 2009, 04:20:46 PM
You don't need a computer for a Weber, use the dizzy off a carb Sammy with a low pressure fuel pump.

...and you'll need a Samurai cam and the angled housing for the Samurai distributor. Samurai intake manifold makes it so that you can buy a weber "kit" and bolt the carb system on.

-Eric
Title: Re: converting a swift mfi to carb?
Post by: fordem on July 14, 2009, 06:33:58 PM
...and you'll need a Samurai cam and the angled housing for the Samurai distributor. Samurai intake manifold makes it so that you can buy a weber "kit" and bolt the carb system on.

-Eric

The Samurai cam & distributor may not be 100% necessary - it depends on how much room he has in the boat.
Title: Re: converting a swift mfi to carb?
Post by: Rhinoman on July 16, 2009, 04:16:23 AM
You'll need the dizzy because theres no advance mechanism in the EFI dizzy. Reading it again it states MFI Swift, does that mean that its a G13B? if it is then it gets a bit more complicated.
Title: Re: converting a swift mfi to carb?
Post by: fordem on July 16, 2009, 03:09:32 PM
You'll need the dizzy because theres no advance mechanism in the EFI dizzy. Reading it again it states MFI Swift, does that mean that its a G13B? if it is then it gets a bit more complicated.

Not necessarily - and this is why my earlier post mentions that there were several different distributors.

First - the G13B designation refers to a block, not an engine, and it does not specify either the fueling or the ignition - I have two different G13B engines, they both have G13B cast into the block, and both engine numbers have a G13B prefix.  One of them is a 16V, DOHC, MPI engine, the other is an 8V SOHC carburetted engine - the 8v engine has no computer, the ignition is entirely in the distributor.

If I am not mistaken the early DOHC, MPI engines did not have EFI controlled advance, the later ones did.