Early 275 2 Cam vs 275 4 Cam Engine Photos and Fresh Rebuilds | FerrariChat
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Early 275 2 Cam vs 275 4 Cam Engine Photos and Fresh Rebuilds

Discussion in 'Vintage (thru 365 GTC4)' started by GSJFerrari, Nov 18, 2022.

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  1. GSJFerrari

    GSJFerrari Formula Junior
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    #1 GSJFerrari, Nov 18, 2022
    Good afternoon everyone,

    We happen to have an early 275 2 cam and a 275 4 cam both finishing their engine rebuilds at nearly the same time and thought you all would enjoy seeing some pictures of them together to showcase their similarities and differences.

    First up is the 275 2 cam, immediately noticeable is the 4 point engine mounts like on 250 cars (and others), the three carburetor setup and obviously the 2 camshafts vs 4. Also of interest are the oil filter pedestal, oil fillers/breathers, the oil pan and the angle drives/distributors. The UFI oil filters painted and decal-ed to look like the vintage Frams are also noteworthy as the modern Frams have had their stand pipes removed.


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  2. GSJFerrari

    GSJFerrari Formula Junior
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    #2 GSJFerrari, Nov 18, 2022
    Up next we have the 4 cam engine. Immediately noticeable are the 6 carburetors, 4 camshafts, 2 engine mounts, the tilted angle drives, the oil filter pedestal and the oil breather tubes. You can also see that all the oil breathers are routed to the intake manifolds and the vapors are pulled by vacuum into the intake tract. The dry sump oil lines are also visible and are quite a departure from the 2 cam as is the routing of the water lines.
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  3. GSJFerrari

    GSJFerrari Formula Junior
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    #3 GSJFerrari, Nov 18, 2022
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  4. Gleggy

    Gleggy Formula 3

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    #4 Gleggy, Nov 20, 2022
    Beautiful work Greg.
    Almost a shame to put that work of art in a car................until you turn the key!
    Well done.
    Murray
     
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  5. daytonaman

    daytonaman Formula Junior

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    #5 daytonaman, Nov 21, 2022
  6. FF4X4

    FF4X4 Karting
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    #6 FF4X4, Nov 21, 2022
    Thank you for posting!
     
  7. TTR

    TTR F1 Veteran
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    #7 TTR, Nov 21, 2022
    Assuming both will be ran on the dyno before installation, any chance you could share the results on each, for comparison ? Even if just via PM ?
    No need to reveal VINs or engine #s, unless owners insist.
    Just curious.
     
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  8. redfred84

    redfred84 Formula Junior

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    #8 redfred84, Nov 21, 2022
    Yes, I would be very interested in dyno results, cost, & rarity comparisons if at all possible; even just ballpark figures.
     
  9. GSJFerrari

    GSJFerrari Formula Junior
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    #9 GSJFerrari, Nov 30, 2022
    And here's a video of the short nose engine running on the stand, as requested. Just a temporary setup to perform some baseline adjustments before reinstalling the engine, including a rough carburetor synchronization.

    -Prescott @ Greg Jones Restoration

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  10. TTR

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    #10 TTR, Dec 1, 2022
    So am I correct to assume no dyno break-in or testing will be performed ?
     
  11. GSJFerrari

    GSJFerrari Formula Junior
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    #11 GSJFerrari, Dec 1, 2022
    That's correct, the engine will be going into a show car, not a race car. Proper break in procedure will be followed with the engine in the car as Greg has done for the last 45 years or so.

    -Prescott @ Greg Jones Restoration
     
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  12. TTR

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    #12 TTR, Dec 1, 2022
    Last edited: Dec 1, 2022
    Thanks for clarifying.
    I was just curious about the performance data.

    While not a Ferrari, but one of the (vintage car) engines I’m currently rebuilding was running/performing relatively well and had allegedly been rebuilt +/-5000 miles ago, so I took the opportunity to dyno it prior to (owner requested) disassembly/rebuild and will dyno it again once I’m done, just to have/see apples-to-apples comparison.
    I also plan to take the car to chassis dyno to see/record the output at the rear tires and/or the power loss in between the end of crankshaft and the tires.
    And all this just for a (relatively rare) Non-Show, Non-Race, Full-size 1960 (factory) High Performance road car to be used as such with perceived value of +/-10% or less than a 275 GTB.
     
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  13. 375+

    375+ F1 World Champ
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    #13 375+, Dec 1, 2022
    Chrysler 300?
     
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  14. ArtS

    ArtS F1 World Champ
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    #14 ArtS, Dec 1, 2022
    Besides the obvious, its cool to see 4 mount / drive shaft vs. 2 mount / torque tube.

    Thanks for sharing!

    Art S.
     
  15. Sergio Tavares

    Sergio Tavares Formula 3

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    #15 Sergio Tavares, Dec 2, 2022
    Thank U 2 share
     
  16. Bowzer

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    #16 Bowzer, Dec 3, 2022
    A celebration of top craftsmen like yourself, who without, all us enthusiasts cannot enjoy these pieces of engineering art with passion.
     
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