575 FHP springs without bar | FerrariChat
Buy

575 FHP springs without bar

Discussion in '456/550/575' started by Ffre92, Jul 24, 2021.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #1 Ffre92, Jul 24, 2021
    Hello, I’m a long time lurker, finally mustered the courage to post. I would like to thank the folks on this forum for their invaluable insight and entertainment over the years!

    I have a 2002 titanio gated 575, and have slowly added parts Taz and others have recommended, including updated suspension ecu and fhp steering ecu, which definitely helped a lot, particularly the suspension ecu. I’m happy with the ride already, but wanted to see if I could improve further. I finally sourced fhp springs, but no luck on either the fhp or hgtc sway bar. Should I wait until I find a bar before I put the springs on, or will I bring out any funny handling characteristics with the stiffer springs but softer 17.5mm bar?

    Image Unavailable, Please Login
     
    NE550, Ferrari55whoa and Bas like this.
  2. Bas

    Bas Four Time F1 World Champ

    Mar 24, 2008
    42,784
    ESP
    Full Name:
    Bas
    #2 Bas, Jul 24, 2021
    Welcome and stunning 575. Love Grigio Titanio!
     
  3. docapl

    docapl Formula Junior

    Apr 26, 2002
    401
    SF Bay Area
    Full Name:
    Anthony
    #3 docapl, Jul 24, 2021
    Ferrari55whoa likes this.
  4. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #4 Ffre92, Jul 24, 2021
    Thanks! I’ve had it for 3 years and I still can’t believe how lucky I am to own it. It is definitely my favorite
     
    Bas likes this.
  5. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,188
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #5 tazandjan, Jul 24, 2021
    She will be fine, but will likely understeer a bit more since the front springs were stiffened more than the rears. The rear anti-roll bar was stiffened to cut down on that understeer, but she will handle fine without it. She is, after all, front engine and front weight-biased with smaller tires up there. Here are the differences I calculated from factory data on spring rates in relation to vanilla 575Ms.

    575M HGTC vs FHP Spring Stiffness



    HGTC

    Front Springs: 35% Stiffer
    Rear Springs: 15% Stiffer
    19.5 mm Rear Anti-Roll Bar: 73% Stiffer

    FHP

    Front Springs: 32% Stiffer
    Rear Springs: 12.5% Stiffer
    21 mm Rear Anti-Roll Bar: 133% Stiffer
     
    docapl likes this.
  6. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #6 Ffre92, Jul 24, 2021
  7. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #7 Ffre92, Jul 24, 2021
    Thanks Taz, it’s reassuring to hear from the expert! Even though the sway bars are NLA, I’m still hoping batches may be made in the future. I thought the FHP springs were NLA, but Scuderia Car Parts was able to get me a set from the factory. All it took was 2 years of calling around…
     
    docapl likes this.
  8. docapl

    docapl Formula Junior

    Apr 26, 2002
    401
    SF Bay Area
    Full Name:
    Anthony
    #8 docapl, Jul 25, 2021
    NE550 likes this.
  9. greg246

    greg246 Two Time F1 World Champ
    Owner Silver Subscribed

    Jun 2, 2004
    26,626
    #9 greg246, Jul 25, 2021

    Hi, I have that set up, i.e, FHP bits except for the rear sway bar. So much better over the standard set up. I haven’t experienced any downside not having the rear bar
     
    docapl likes this.
  10. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #10 Ffre92, Jul 25, 2021
  11. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #11 Ffre92, Jul 25, 2021
    Thanks!! That’s exactly what I was hoping to hear
     
  12. 308 GTB

    308 GTB F1 World Champ
    Rossa Subscribed

    Feb 7, 2002
    11,729
    New Jersey
    Full Name:
    Barry Wolinsky
    #12 308 GTB, Jul 25, 2021
    Refer to this document in your selection of a rear sway bar...
     

    Attached Files:

  13. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #13 Ffre92, Jul 25, 2021
    Thanks. If I went with the FHP springs and went up on front tire width, would that work to dial out the understeer somewhat, with added benefit of better braking? That’s another area the 575 can get some help in. Fade is not an issue since I don’t track, but just getting better bite.
     
  14. 308 GTB

    308 GTB F1 World Champ
    Rossa Subscribed

    Feb 7, 2002
    11,729
    New Jersey
    Full Name:
    Barry Wolinsky
    #14 308 GTB, Jul 25, 2021
    If you're not tracking your 575M, slight understeer should not be a problem. You might just want to use the Racing Setup guide I posted to help make your car's handling more neutral.
     
    Ffre92 likes this.
  15. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,188
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #15 tazandjan, Jul 25, 2021
    I would just put Michelin Pilot Super Sport tires on her if you do not already have them. The 255/40 18 (I assume your 02 has 18" wheels since the modulars were not available until around SN 130xxx) tires are already as wide as Michelin recommends for 8.5" wheels. Talk to Michelin and they have actually recommended MPS4S on the fronts and MPSS on the rears at one point. The slightly greater grip on the MPS4S tire may cut down on understeer, but check with Michelin and make sure the two are compatible.
     
  16. Ffre92

    Ffre92 Formula Junior

    May 26, 2014
    693
    NY
    #16 Ffre92, Jul 26, 2021
    That’s a great idea to me. I have MPSS all around already on the 18s. I called Michelin, but I don’t know if what the rep said made sense: he said Michelin doesn’t recommend mixing any of the tires (which I understand for liability). However he also said the PS4S was LESS grippy than the MPSS. I told him I was suprised to hear that, but he said MPSS was built more for performance/track use and PS4S for comfort. I’ve never heard this before…
     
  17. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,188
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #17 tazandjan, Jul 26, 2021
    Me, either, and I tend to doubt it.
     
  18. white out

    white out Formula 3

    Mar 3, 2010
    1,289
    #18 white out, Jul 27, 2021
    You'll be good with the stock sway bars and stiff springs.
     
    Ffre92 likes this.
  19. docapl

    docapl Formula Junior

    Apr 26, 2002
    401
    SF Bay Area
    Full Name:
    Anthony
    #19 docapl, Sep 25, 2021
    I took my 575M out for an early morning drive to try out the new FHP springs. Between this and the updated suspension ECU, it's a huge improvement. No porpoising, dive and squat minimal now. Compression and rebound feel considerably faster and sharper. More of sports car handling feel now than luxury ride, which I think suits a Ferrari much better.

    It's fantastic as it is but I would sure like to find the 21mm rear sway bar to complete the FHP suspension.
     
    white out, 575, Ffre92 and 2 others like this.
  20. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    39,188
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    #20 tazandjan, Sep 25, 2021
    Anthony- Glad it worked out. Now there is no hurry on getting the rear bar. Those springs will take some time to settle. After they do you can actually go to Euro ride height if clearance is not an issue for you. On US FHPs, ride height was recommended to be the same for standard and FHP.

    I would give her a full four wheel alignment after everything settles. Easy to do since 575Ms use eccentrics like most cars instead of the shims on the V8s and later V12s.
     
    docapl, Ffre92 and greg246 like this.

Share This Page