355 - Motronic 2.7 or 5.2 - how can you tell ?

Discussion in 'Technical Q&A' started by ferrari355gtb, Nov 6, 2003.

  1. ferrari355gtb

    ferrari355gtb Formula 3

    Nov 3, 2003
    Full Name:
    Is there a quick of knowing whether your 355 is using Motronic 2.7 or 5.2 ?
  2. The 2.7 came on the 1995 355s and had DUAL Mass Air Flow Sensors. The 1996+ has a single Mass Air Flow Sensor.
  3. rexrcr

    rexrcr Formula 3

    Nov 27, 2002
    Kalamazoo, MI
    Full Name:
    Rob Schermerhorn
    Yes, dual air intakes merging into one MAF (hot film, as opposed to hot wire on 2.7).
  4. 355fiorano

    355fiorano Formula Junior

    Oct 21, 2003
    Full Name:
    Visualy you can tell by looking at the engine bay. If you see the airflow tubbing come straight down from each cilinder bank to their own airbox on either side then it is the 2.7 . If the tubbing comes together in the middle into one air bos then it is the 5.2

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