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Thread: swap MFI pumps

  1. 11-04-2018, 10:55 PM #1
    levrairoms
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    swap MFI pumps

    Hi,
    I have a 1973 911E which has been passed to 40 weber carbs a few years ago by the previous owner. I have the opportunity to buy a mfi pump + system that comes from a 1973 911T.
    Does anyone know if they are the same? If yes, will I need to adapt the pump, make changes to it if I ever want to install it?

    Thanks for your answers and sorry for my english, I'm from France.

    Romain
    1973 2.4E Targa
    1974 2.7 Carrera US
    Author : https://www.livre911classic.com
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  2. 11-05-2018, 03:38 AM #2
    tom1394racing
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    The throttle bodies and plastic stacks are a larger bore size in the 2.4E as compare to the 2.4T. The injection pump also has more capacity in the E than the T.
    Tom Butler
    1973 RSR Clone
    1970 911E
    914-6 GT Clone in Progress
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  3. 11-05-2018, 06:17 AM #3
    2.5MFI
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    They are not the same, but will bolt on with no problems fitting. The 2.4 T MFI system for the 72 - 73 was for the lower compression ( 7.0:1 ) engine along with the mild T camshafts. Your 73 E has 7.5:1 ( IIRC ) compression and a little more aggressive cams. If you end up getting the 73 T MFI system and installing it your engine will run a little lean in a few areas. If you have a good mechanic that is very familiar with the MFI pump adjusting the system can be made to work somewhat but not perfect. If you can find the correct E MFI system, it would be the best choice and of course run better.
    Mark Jung
    MFI Werks
    Early 911S Registry #972
    Carrera T w/LWB, MT, RWS, PCCB
    72 T 66 x 100 MFI Twin Plug Coupe
    R Gruppe #686
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  4. 11-05-2018, 10:31 PM #4
    levrairoms
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    Thanks for you answers, I will take time to think about it and maybe see if I can find a 2.4E pump instead.

    Best,
    1973 2.4E Targa
    1974 2.7 Carrera US
    Author : https://www.livre911classic.com
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