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  1. t024484
    Post

    456 Smoking when cold

    Hi Keith, I had exactly the same problem with my 1999 456 , smoking when cold, stopping to smoke when hot. Oil consumption was roughly 1 Liter...
    Post by: t024484, Jul 22, 2009 in forum: 456/550/575
  2. t024484
    Post

    456gt rough idle

    This could be anything. Leaking valve, malfunctioning Lambda sensor, bad connector, malfunctioning injector, bad leads to the power plugs,...
    Post by: t024484, May 18, 2009 in forum: 456/550/575
  3. t024484
    Post

    550 exhaust

    That more back pressure leads to more torque is a myth that seems to be unerasable. Backpressure leads to worse cylinder fill with fresh mixture,...
    Post by: t024484, Mar 17, 2009 in forum: 456/550/575
  4. t024484
    Post

    Ferrari 550 Maranello Rear-Wheel HP?

    Hi Claudio, My posting was just a warning to take great care of figures that Dynoshops are producing, not to embarrass you. Stevens races...
    Post by: t024484, Mar 16, 2009 in forum: 456/550/575
  5. t024484
    Post

    Ferrari 550 Maranello Rear-Wheel HP?

    It is almost impossible that these power figures are at the rearwheels. Stevens did a series of dynoruns with his highly tuned 550. With 542Hp on...
    Post by: t024484, Mar 15, 2009 in forum: 456/550/575
  6. t024484
    Post

    456 front shock? stiffness?

    What exactly is your question. Do you want to go back to your original 456 shocks after having made them firmer ? If you are happy with the 550...
    Post by: t024484, Mar 2, 2009 in forum: 456/550/575
  7. t024484
    Post

    Question about 550 X-pipe exhaust mods

    That is 100% wrong. X or H pipes are disturbing the scavenging effect, for this engine. That is what dyno tests confirm. Hans
    Post by: t024484, Feb 14, 2009 in forum: 456/550/575
  8. t024484
    Post

    456 on the Dyno

    I live in the Netherlands. BMC filters can be ordered here: http://www.bmc-sportluftfilter.de The sound level increased, but in the car only...
    Post by: t024484, Feb 9, 2009 in forum: 456/550/575
  9. t024484
    Post

    Need advice on a 456M GT

    You are right, repairs can be extremely expensive. One of them is having the valve guides replaced, because the engine is consuming too much oil....
    Post by: t024484, Feb 5, 2009 in forum: 456/550/575
  10. t024484
    Post

    456 on the Dyno

    I replaced the resonator, because the 575 did the same, and because the existing resonator acts like an Xpipe, meaning that the left and right...
    Post by: t024484, Feb 4, 2009 in forum: 456/550/575
  11. t024484
    Post

    Question about 550 X-pipe exhaust mods

    The dynamics are probably quite simple. With Xpipes the sucking of exhaust gasses out of the combustion room is being disturbed by backpulses...
    Post by: t024484, Feb 3, 2009 in forum: 456/550/575
  12. t024484
    Post

    456 exhaust vs. 550 & 575 exhausts.

    456 versus 550 Hans [ATTACH] [ATTACH]
    Post by: t024484, Feb 2, 2009 in forum: 456/550/575
  13. t024484
    Post

    456 exaust

    Hi Alfredo, I had NKG, but I switched back to Champion. It is hard to say which one is better, I did not notice the difference. The Ferrari...
    Post by: t024484, Jan 28, 2009 in forum: 456/550/575
  14. t024484
    Post

    456 exaust

    I kept the stock tail mufflers, since their sound is perfect in the new setup. No booming, rattling or annoying resonances. I posted a dyno...
    Post by: t024484, Jan 28, 2009 in forum: 456/550/575
  15. t024484
    Post

    456 exaust

    First removed the rear silencers, then removed the rear tubes connected to the mid silencer and after that the mid silencer itself. I took the...
    Post by: t024484, Jan 27, 2009 in forum: 456/550/575
  16. t024484
    Post

    456 exaust

    I have simply replaced the middle silencer for two straight tubes costing less than $100,-. On the rolling road this produces 15Hp plus, and the...
    Post by: t024484, Jan 26, 2009 in forum: 456/550/575
  17. t024484
    Post

    Engine hesitates at steady throttle

    Jan, Looking at your profile, I saw that you are living in the Netherlands, just like me. Is your car dark green or dark blue. Mine is blue...
    Post by: t024484, Oct 9, 2008 in forum: 456/550/575
  18. t024484
    Post

    Engine hesitates at steady throttle

    I had the same with my 456M GT. Problem disappeared completely after all valve guides had been replaced. My car was consuming almost 1 litre of...
    Post by: t024484, Oct 8, 2008 in forum: 456/550/575
  19. t024484
    Post

    Door window noise problme 456

    I had this problem on the passenger site of my 456. My wife hated the car for that. It was repaired by the Dutch Ferrari distributor for a few...
    Post by: t024484, Aug 4, 2008 in forum: 456/550/575
  20. t024484
    Post

    Bosch relay coil suppression

    I am sorry to say, but you pretend to have quite some knowledge on the subject, but what you say is irrevelant. Just take a simple diode to...
    Post by: t024484, Jul 3, 2008 in forum: Technical Q&A
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