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Thread: How does the Jenvey heritage EFI perform?

  1. 12-28-2022, 01:34 PM #1
    Einar Irgens
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    How does the Jenvey heritage EFI perform?

    I am trying to gather info about how an F-model 911 performs with this kit installed:

    https://www.jenvey.co.uk/media-centr...-porsche-kits/

    Has anyone here had the chance to test drive? Has any of the Porsche magazines done it?

    More interesting than what it does on paper, is how the ride is in terms of power delivery. Is it as brutal and responsive as with an original MFI system? Can it be programmed to "simulate" an MFI torque curve?

    Einar
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  2. 12-28-2022, 01:43 PM #2
    uai
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    There are a couple of others also using your original webers and adding the injectors to the air cleaner plenum above the trumpets.
    I think the Hardware is secondary getting the tuning right is rather the issue. With ITBs you'll run mostly an alpha-n where your fueling map goes on UPM and Throttle Position. The problem is that perhaps 80% of the map is in the first 20% of throttle position so you'll probbaly want to have a system that can handle both MAP (ManifoldPressure) and Alpha N. Alpha N for the main and MAP for correction of Alpha N at low throttle opening.
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  3. 12-29-2022, 10:02 AM #3
    Chris Pomares
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    I've been looking these over for my POLO engine. If anyone tries the double or triple I'd like to get their observations please. Several of the later POLO engines are using Jenvey's other throttle bodies with good success, but I like the period look.
    I think Empi is looking at these after the PMO purchase but I worry about quality.
    https://store.jenvey.co.uk/heritage/...-throttle-body
    1959 Auratium Green 356A Super w/ Rudge wheels
    1970 Irish Green 914-6 w/2.2S
    Current -1967 Bahama Yellow 912 POLO 2cam4 #1
    www.reSeeWorks.com
    Personalized Vintage Porsche's and parts
    I couldn't find the sports car of my dreams, so I built it myself-Ferdinand Porsche
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