F355 sometimes runs better than other times | FerrariChat

F355 sometimes runs better than other times

Discussion in '348/355' started by F355Bob, Jun 11, 2008.

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  1. F355Bob

    F355Bob Formula 3

    My F355 is a 95 with Hyperflows. GruppeM intake and Challenge chip from a Challenge car. There are times when the acceleration from any gear is fantastic. Just touch the throttle and the car accellerates with terrific power in any gear at any rpm. Other times it seems not to be as responisive.When it is very responsive the throttle seems to be very smooth. I know about the sticky throttle. It is not a matter that when the throttle seems smoother that it is easier to press the pedal. It seems like something else. Could it be fuel pump, throttle position sensor, timing not advancing as well as other times, bypass? The car always runs great, it just seemss at times it is so much more respsonsive than other times.
     
  2. jmillard308

    jmillard308 F1 Veteran
    Owner

    May 29, 2003
    6,675
    Perth West Oz
    Full Name:
    John Millard
    Where do you acquire one of these?
     
  3. F355Bob

    F355Bob Formula 3

    I got it 3-4 years ago form a guy who was running a challenge car in New York. He had an extra chip and I bought it. Really improved the car and is much faster than other F355's that I have driven.
     
  4. 285ferrari

    285ferrari Two Time F1 World Champ
    Sponsor

    Sep 11, 2004
    20,956
    MD and NE
    Full Name:
    Robbie
    You can have the ECU reflashed to perform as a CH chip, I believe
     
  5. jm3

    jm3 F1 Rookie

    Oct 3, 2002
    4,364
    United States
    Full Name:
    JM3
    How many "chips" did you buy? You should have gotten 2.

    The 1995 2.7 ECUs (plural) use a removable chip. You remove the chip and burn a new one and reinstall the new chip. "Flashing" implies reprogramming the ECU memory through a port, which is for 96-99.


    Jay
     
  6. F355Bob

    F355Bob Formula 3

    The 95 has a chip in each computer. You replace the chip instead of burning a new one. It is removable and easy to replace.
     
  7. ferrariwant2be

    ferrariwant2be Karting

    Jan 14, 2008
    87
    I'm kind of guessing this has been discussed before so forgive me. It seems I could purchase blank chips and program the chips myself with the right equipment. Am I correct? But where would I get the CH program?

    It seems like it could be a cost effective upgrade in power... That is as long as you don't need race fuel to drive it! :)
     
  8. billyfitness

    billyfitness Formula Junior

    Feb 14, 2006
    581
    Overland Park, KS
    Full Name:
    Bill Leavitt
    Powerchip charges what....like $2K?
     
  9. 355

    355 F1 Rookie
    BANNED

    Jan 4, 2005
    3,643
    Toronto
    Full Name:
    Frank
    #9 355, Jun 11, 2008
    Last edited: Jun 11, 2008
    Dosnt look like your question is getting answered but you would have no trouble selling your ch chip(s) :) Have you tried rebooting your 2.7 motronics? Make sure you have your car fully warmed up and then turn it off. Turn the electrical power off under the front hood right side for 20minutes. After 20 minutes, start the car and dont touch the throttle and have everything turned off. Let it run for a little more than 10 minutes. During that time the motronic is rememorizing all the faults and corrects itself. This will not effect your chip as my car has one too. This is just one of the many benifits of owning a 95. The Challenge chip is amazing. My car is faster than a 360 no problem.
     
  10. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,037
    USA
    According to the WSM all that is effected by rebooting is the resetting of the idle parameters. Is this not true?
     
  11. 355

    355 F1 Rookie
    BANNED

    Jan 4, 2005
    3,643
    Toronto
    Full Name:
    Frank
    No that is not true.....I reset my(95) 2 to 3 times a summer and it runs totaly different.
     
  12. potxoli

    potxoli Formula 3

    Mar 22, 2007
    1,716
    Washington DC
    Full Name:
    Eric B.
    Does anybody know of a good source of a battery disconnect switch to disconnect the battery? Mine is in the rear and a pain to get to. Griot's sells one, but it is for the negative terminal, would that work in resetting the ECUs? I have CEL on and off that I'm trying to figure out....
     
  13. Llenroc

    Llenroc F1 Veteran
    Rossa Subscribed

    Jun 9, 2004
    5,459
    Colorado
    Full Name:
    Vern
    #13 Llenroc, Jun 11, 2008
    Last edited: Jun 11, 2008
    As I have said before there is no such thing as a challenge chip at least not from ferrari. All the ECUs for 355ch are the same as the road car versions.
    All the cars have seals on each of ECUs and they were checked at every race to verify no one tampered with the "stock" ECUs. In fact the boxes from one car would be switched to another car running in the race so there would be no advantage to try to mod the ECUs. ie; you would be helping your competitors
     
  14. MaleficVTwin

    MaleficVTwin F1 Rookie

    Jun 5, 2006
    4,312
    Reno NV
    Full Name:
    Matt
    Talk to No Doubt. He has done some work with the 2.7 348 chips, I believe. :)
     
  15. DT-355

    DT-355 Karting

    Oct 14, 2007
    51
    Where do I find the Challange Chip...I have a need for more speed.
     
  16. No Doubt

    No Doubt Seven Time F1 World Champ

    May 21, 2005
    72,740
    Vegas+Alabama
    Full Name:
    Mr. Sideways
    The "learned" fuel/air maps and error codes are erased on reboot of the M2.7; you go back to the fixed fuel/air tables.
     
  17. redryder

    redryder Karting

    May 30, 2008
    100
    usa
    Full Name:
    george
    Llenroc has spoken the truth and this fantasy about some super chip for the CH is not reality. If you want verification then pull this supposed CH chip and copy the data to your PC....now do the same with the street car version 2.7 chip.....Now compare the 2 programs and see if there is in fact a difference.

    This is the ONLY way to resolve this never ending debate once and for all.
     
  18. F355Bob

    F355Bob Formula 3

    I think the challenge chip that I have was made by one of the teams in NY. The guy was a winner of the series one year. They developed the chip for the car after the series was over and used it for track work. They called it a challlenge chip because it was on a Challenge car. I can't speek for availablity of a "Challenge chip".
     
  19. DT-355

    DT-355 Karting

    Oct 14, 2007
    51
    I'm like to try your rebooting, but I have a stupid question. I'm just an owner trying to learn a little more about my car, so please forgive my ignorance in this matter.
    FIRST: Is the electrical switch under the front hood the round dial...and
    SECOND: after the 20 minute rest-period and before you start the car again for the 10 minute restart, do you turn the power switch back on or do you leave it off? Sorry, I don't even know if the car will run with the switch in the off mode. I've read so many nightmares about our 355's that I'm afraid to try anything that might send it back to the shop without asking first.
    Thanks for your help.
     
  20. F355Bob

    F355Bob Formula 3

    Recalibrating the computer as was said, did the trick. The car runs consistant and throttle is instant. Thanks
     

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