intake and exhaust valves | FerrariChat

intake and exhaust valves

Discussion in '348/355' started by Tape32, Apr 6, 2015.

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  1. Tape32

    Tape32 Karting

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    I am getting everything in place to finally drop my engine and have my valve guides and valves replaced. Hopefully no liner damage but we will see. I contacted Manley, the valves are a custom order they need to have a sample intake and exhaust valve. Seems odd as they have obviously cut 355 valves before.

    Does anyone have an old intake and exhaust valve they could lend me? I would like to have my valves before I drop the engine.

    Any help is appreciated!
     
    Tape32, Apr 6, 2015
    #1
  2. Mitch Alsup

    Mitch Alsup F1 Veteran

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    WSM book 1 chapter B page 40 has the blueprint specs.

    (WSM is freely available on line)
     
    Mitch Alsup, Apr 6, 2015
    #2
  3. Tape32

    Tape32 Karting

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    Thanks Mitch, I will check it out.
     
    Tape32, Apr 9, 2015
    #3
  4. UConn Husky

    UConn Husky F1 Rookie

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    What year is your 355?
     
    UConn Husky, Apr 10, 2015
    #4
  5. johnk...

    johnk... F1 World Champ Owner

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    And why is it you believe you need new valves if you haven't pulled the heads yet?
     
    johnk..., Apr 10, 2015
    #5
  6. Tape32

    Tape32 Karting

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    UCONN it's a 1995 Berlinetta

    JohnK, I may not need new valves but with the heads apart for new guides I would prefer to upgrade the OEM valves with higher quality valves.
     
    Tape32, Apr 10, 2015
    #6
  7. SoCal1

    SoCal1 F1 Veteran Owner Silver Subscribed

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    Yup need new valves, mo better meaty meat burger
    Nice lightweight ones

    :)
     
    SoCal1, Apr 10, 2015
    #7
  8. Mitch Alsup

    Mitch Alsup F1 Veteran

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    Oh, just for the record,
    After 60K total miles and 5K track miles along with about 20 minutes over red-line, all 40 of my valves were still in spec, as were all 80 valve springs. The guides, not so much. The valves had new seats cut, the seats were given a 5 angle cut during the refurb.

    All 40 hydraulic tappets were in spec, also.

    --------------------------------------

    Now if I were (WERE) to need new valves, I would put Ti valves with DLC coatings in.......
     
    Mitch Alsup, Apr 10, 2015
    #8
  9. SoCal1

    SoCal1 F1 Veteran Owner Silver Subscribed

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    all 40 good? lucky you

    See you do need them Ti
     
    SoCal1, Apr 10, 2015
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  10. 8500rpm

    8500rpm Formula Junior

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    Mitch, was your car bronze or steel guides originally?
     
    8500rpm, Apr 10, 2015
    #10
  11. Andy 355

    Andy 355 Formula Junior

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    Whats the general opinion on k.lined guides with modern materials and new superformance valves? Just another idea i guess.
     
    Andy 355, Apr 11, 2015
    #11
  12. Mitch Alsup

    Mitch Alsup F1 Veteran

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    I "blame" this on changing the oil after each track day/event.
     
    Mitch Alsup, Apr 11, 2015
    #12
  13. 2NA

    2NA F1 World Champ Consultant Owner Professional Ferrari Technician

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    What spec?

    Please enlighten us.
     
    2NA, Apr 11, 2015
    #13
  14. SoCal1

    SoCal1 F1 Veteran Owner Silver Subscribed

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    Yeeeuup and using a nice light weight oil for the street to keep them flushed and regular like prune juice :)
     
    SoCal1, Apr 11, 2015
    #14
  15. SoCal1

    SoCal1 F1 Veteran Owner Silver Subscribed

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    Good question, I am not 100% on it but I ASS U ME as long as they are pumped up and no blueing on the surface
    I'm sure there is a collapse pressure somewhere like a valve spring
     
    SoCal1, Apr 11, 2015
    #15

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