Good TDC Tool For 456 | FerrariChat

Good TDC Tool For 456

Discussion in '456/550/575' started by scowman, Feb 18, 2018.

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  1. scowman

    scowman F1 Rookie

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    #1 scowman, Feb 18, 2018
    What's a good TDC tool for the 456. It has such a long tunnel. I see some cam degreeing kits. Anyone use those? Don't want to spend a fortune but want accuracy and ease of use/setup
     
  2. Dave rocks

    Dave rocks F1 World Champ
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    #2 Dave rocks, Feb 18, 2018
  3. Cribbj

    Cribbj Formula 3

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    #3 Cribbj, Feb 18, 2018
    Ken, a TDC finder will give you the point in the middle of the TDC "dwell", but the "Ferrari" way of finding TDC is different.

    Ferrari defines TDC as the point where the piston initially reaches TDC, not the middle of the dwell. (The dwell can be from 1.5 to 2.5 degrees of crankshaft travel, depending on cam lobe wear, and other factors.)

    So the best way, IMO, to find TDC is with a dial indicator, and then it's up to you whether you use the Ferrari method to set your degree wheel, or you set it in the middle of the dial indicator dwell.
     
  4. Dave rocks

    Dave rocks F1 World Champ
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    #4 Dave rocks, Feb 18, 2018
    John - I would encourage you to read thru the thread I posted. The harsh reality is a dial indicator is far less accurate than a dead stop.
     
  5. scowman

    scowman F1 Rookie

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    #5 scowman, Feb 19, 2018
    Understand but I believe I can use the dial gauge like a dead stop. Measure +- distance on both sides, take degree wheel readings and divide by two.

    What I need is a dial gauge that will work well down the long access tube.

    Any ideas on that?
     
  6. Dave rocks

    Dave rocks F1 World Champ
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    #6 Dave rocks, Feb 19, 2018
    See the thread I posted and review in detail - a dead stop is much more accurate.
     
  7. scowman

    scowman F1 Rookie

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    #7 scowman, Feb 19, 2018
    I don't want a dead stop thanks. I want a dial gauge. Can someone please recommend a dial gauge that works on the 456?

    Thanks
     
  8. bergxu

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    #8 bergxu, Feb 19, 2018
  9. tazandjan

    tazandjan Three Time F1 World Champ
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    #9 tazandjan, Feb 19, 2018
  10. scowman

    scowman F1 Rookie

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    #10 scowman, Feb 19, 2018
    Just ordered it. Unfortunately they make you buy all three sizes. But at least I'll have them now.o_O
     
  11. stevepaa

    stevepaa Formula Junior
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    #11 stevepaa, Feb 21, 2018
    I used the hill kit on my 575, very easy to use. You can see TDC easily, and I did not find much dwell at all. Theoretically there should not be any dwell at all.
     
  12. Dave rocks

    Dave rocks F1 World Champ
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    #12 Dave rocks, Feb 21, 2018
    The dwell is a result of rod bearing clearance.
     

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