Thread: MFI in a 930
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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
New thought for boost enrichment.

It might be possible to use a Boost-Retard pot from a distributor to add enrichmentt to the MFI pump. If you look at pictures of the 935 pumps you can see a can on top which is what was used for boost enrichmentt and I suspect to adapt fueling to different boost levels that came with adjustable boost.

When I did my 2.8 MFI motor I removed the thermostat on the MFI pump and replaced it with a plate & external adjustment screw. One might use that circuit with a bell crank to create leverage & reduce travel, and use the dist pot for enrichment.

No idea how much enrichment that can be effected at those points.

The other place might be to take off the barometric / altitude can and put it there but I would make that a second choice.

I suspect that if one is wants to use adjustable boost, an enrichment can will be a must. If the boost is fixed, fueling could be done at the space cam level or with an all or nothing strategy using the dist boost ret pot.

Could be a fun project.
Old 12-22-2009, 08:57 AM
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