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355 Dyno

Discussion in '348/355' started by allanlambo, Feb 26, 2004.

?

355 rwhp, more/less or same as 360

  1. Less than a stock 360

  2. More than a stock 360

  3. Same as a stock 360

Multiple votes are allowed.
Results are only viewable after voting.
  1. allanlambo

    allanlambo F1 Rookie

    Jun 9, 2002
    4,363
    Maui
    Full Name:
    Allan
    I found a place in Maui that has a wheel dyno so im going to try and dyno the 355 in the next few weeks. Let me know what you think it will dyno. It has custom exhaust,headers,cat-bypass pipes and air boxes.
     
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  3. allanlambo

    allanlambo F1 Rookie

    Jun 9, 2002
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    Allan
    Also, what are the weights of the 2 cars. My car is a 97 Spider.
     
  4. bobafett

    bobafett F1 Veteran

    Sep 28, 2002
    9,193
    My guess is more.

    --Dan
     
  5. TheScarletStang

    TheScarletStang Formula Junior

    Feb 7, 2004
    458
    Irvine, California
    Full Name:
    Sean Salter
    dang i did not read your post before i did the poll....my guess would prolly be more even tho my poll result is less......
    especially with the headers and exhaust that would be good hp increase depending the brand

    good luck with the dyno if u haven't done it already ^_^
     
  6. allanlambo

    allanlambo F1 Rookie

    Jun 9, 2002
    4,363
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    Allan
    Ill try and do it within the next 2 weeks.
     
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  8. sherpa23

    sherpa23 F1 Veteran
    Silver Subscribed Owner

    May 28, 2003
    9,501
    Colorado
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    Bastuna
    309 rwhp. What do I win?
     
  9. rob lay

    rob lay Administrator
    Staff Member Admin Social Subscribed Miami 2018 Owner

    Dec 1, 2000
    50,949
    Southlake, TX
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    Rob Lay
    Remember not to use Ferrari's 360 HP numbers. :) Seriously.
     
  10. allanlambo

    allanlambo F1 Rookie

    Jun 9, 2002
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    Allan
    Im hoping for 320rwhp.
     
  11. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    7,054
    Its hard to say:

    The dyno output of a 360 in normal running condition fully tuned is between 320 HP and 330 HP, with 310 HP and 335 HP as lower and upper confidence levels (93%).

    A typical dyno on a F355 should be in the 295 HP to 305 HP range with 285 HP and 310 HP as lower and upper confidence level (93%).

    Therefore, you have at least a 7% chance that any random stock F355 will out dyno any random stock F360.

    You have added headers, and miscellaneous exhaust components and miscellaneous intake components. Normally these can add some minor amounts of TQ and HP in the amounts of around 10 HP.

    If I take the 10 HP as a 100% confident number; you end up with about a 37% chance of out dynoing a random fully tuned absolutely stock 360 on the same chassis dyno, running the same gasoline on the same day......

    If I take the 10 HP number as a normally distributed range from 5 HP through 15 HP, you end up with aabout a 29% chance of out dynoing that same F360 same caveats.
     
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  13. jakermc

    jakermc Formula 3
    Owner

    Jan 17, 2004
    1,778
    Palm Beach, FL
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    Rob
    Your assumptions call for a 20% drive train loss for the 355, assuming the factory specs are correct. This seems like a lot. My experience is with Porsches where the rule of thumb is usually conservatively set at 15%. Some go as high as 18%. Why such big a loss with the 355?
     
  14. 4sfed4

    4sfed4 Karting

    Dec 22, 2003
    231
    Its either that or those guys in Modena have been a little liberal with their dyno calibrations :D
     
  15. allanlambo

    allanlambo F1 Rookie

    Jun 9, 2002
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    Allan
    My seat of the pants dyno indicates more than a 10hp increase from my mods. Car also feels quicker then my uncles 360 did.
     
  16. scycle2020

    scycle2020 F1 Rookie

    Jan 26, 2004
    3,458
    potomac
    aside fron the dyno numbers.....the 360 is significantly lighter than the 355....i have driven 5 355s and 4 360s andthe 360s all felt subjectively quicker
     
  17. spyderman

    spyderman Formula 3

    Nov 4, 2003
    1,472
    Toronto - Canada
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    Spyderman
    I am guessing you will be around 320 HP with that set up :) Good luck!
     
  18. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    7,054
    I thought he was only dyno racing the cars.
     
  19. Auraraptor

    Auraraptor F1 World Champ
    Lifetime Rossa Owner

    Sep 25, 2002
    11,436
    MO
    Helical gear I think its called? Something like that.
     
  20. Senna1994

    Senna1994 F1 World Champ

    Nov 11, 2003
    12,801
    San Clemente
    Full Name:
    Anthony Tonokaboni
    I have a 95 355b with Tubi and KN's my 360 Spider (sold) felt much quicker.
     

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