pistons for a 246 euro | FerrariChat
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pistons for a 246 euro

Discussion in '206/246' started by T.O. Dino, Nov 20, 2004.

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  1. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #1 T.O. Dino, Nov 20, 2004
    I am in the middle of a rebuild and need suggestions on which pistons to use original if available or aftermarket and which type?
     
  2. stratos

    stratos Formula Junior

    Dec 9, 2003
    639
    Switzerland
    #2 stratos, Nov 21, 2004
  3. dm_n_stuff

    dm_n_stuff Four Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2003
    43,753
    26.806311,-81.755805
    Full Name:
    Dave M.
    #3 dm_n_stuff, Nov 21, 2004
  4. Slim

    Slim Formula 3

    Oct 11, 2001
    1,735
    Pacifica, CA, USA
    Full Name:
    richard
    #4 Slim, Nov 21, 2004
    I bought the high comp pistons from Superformance in England for my 246 motor. They actually had JE wrappers on them which means they were made right here in California, went all the way to England, only to come right back to California, ha!

    You can see them in these photos:

    http://www.3jar.com/fiat/dino/pages/08_piston%26rod_top.htm
    http://www.3jar.com/fiat/dino/pages/07_bottom_bits.htm

    Despite the compression bump from these pistons, with the stock cams I still managed to run on 91 or 92 octane pump gas without pinging, even on hot California days.
     
  5. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #5 T.O. Dino, Nov 21, 2004
    Thanks for the pics Slim. Dave did you bump the compression up in your car ?
     
  6. dm_n_stuff

    dm_n_stuff Four Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2003
    43,753
    26.806311,-81.755805
    Full Name:
    Dave M.
    #6 dm_n_stuff, Nov 22, 2004
    Yup.

    93 mm 10:1 compression ratio.

    I run 93 octane minimum with these.

    Turns out they are Harley pistons, so they are slightly flared from top to bottom, but they work great, and the car performs like a champ.

    The engine is VERY STRONG. My mechanic did a great job on the rebuild. He was initially nervous about the pistons, but once they were in, he loved them.

    DM
     
  7. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #7 T.O. Dino, Nov 22, 2004
    Did you guy's also oversize your valves and change your cams etc. Just trying to figure out which way to go with the motor.
     
  8. dm_n_stuff

    dm_n_stuff Four Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2003
    43,753
    26.806311,-81.755805
    Full Name:
    Dave M.
    #8 dm_n_stuff, Nov 22, 2004
    Nope. Stock on the valves, did replace the guides and seats when we did the valves with hardened seats to solve that pesky unleaded gas problem, other than that, left them alone.
     
  9. tzucc

    tzucc Formula Junior

    Jun 3, 2003
    316
    #9 tzucc, Nov 24, 2004
    what pesky unleaded gas problem is that?

    on the rebuild topic, I've always toyed with the notion of seeing how many more HP can be squeezed out of this engine. Trying higher comp pistons, different cam, whatever. But then someone gave me good advice. Buy an 8 or 12 cyl.

    --
    Dino #4948
     
  10. stratos

    stratos Formula Junior

    Dec 9, 2003
    639
    Switzerland
    #10 stratos, Nov 24, 2004
    You can get a reliable and very useable 280bhp out of a 2.4lt Dino...
     
  11. tzucc

    tzucc Formula Junior

    Jun 3, 2003
    316
    #11 tzucc, Nov 24, 2004
    Very nice. That would be an improvement of what like almost 40% or so?
    Have you driven in such a Dino... how's it compare on low end and up to redline?

    Also, if you know how it's done or who does such a thing, I would love to hear about it. That's my only one little complaint about the little bobcat... it snarls but the bite isn't very sharp.

    thanks.
     
  12. stratos

    stratos Formula Junior

    Dec 9, 2003
    639
    Switzerland
    #12 stratos, Nov 24, 2004
  13. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #13 T.O. Dino, Nov 24, 2004
    Thanks for the advice TZUCC, but I like my Dino just fine. IT would be nice to have gobs of horsepower but I am just trying to get just a little more performance, thats it. Besides if I want that kid of a rush I just hop on my Ducati 998R and thats enough to satisfy any need for speed.
     
  14. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #14 T.O. Dino, Nov 24, 2004
    oops did i say kid i meant kind
     
  15. dm_n_stuff

    dm_n_stuff Four Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2003
    43,753
    26.806311,-81.755805
    Full Name:
    Dave M.
    #15 dm_n_stuff, Nov 27, 2004
    Any decision on oversize or upped compression on the rebuild?

    Oh, and how about pix of the engine internals while you have it torn apart?

    Thanks,

    Dave
     
  16. T.O. Dino

    T.O. Dino Formula Junior

    Oct 30, 2004
    350
    Toronto Canada
    #16 T.O. Dino, Nov 27, 2004
    I think I am going to go your route. 92mm 10.1, because of the positive response you gave me on the running of your car. I am working on the pics, I just need to sort through tons of pics to find the ones with the car in one piece. I will send them soon.
     

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