Girodisc Testarossa rotors | FerrariChat

Girodisc Testarossa rotors

Discussion in 'Technical Q&A' started by velocityengineer, Sep 13, 2004.

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  1. velocityengineer

    velocityengineer Formula Junior

    Nov 8, 2003
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    Eric Dahl
    Hey guys,
    Have a look at the rear Testarossa replacement we have just finished the prototype for at Girodisc. Of course there is a front as well.

    The difference in quality is obvious. Also have a look at Martin fearlessly attacking an Italian job after years of Porsche work. Brave soul.

    The Testarossa units will be available very soon. Have a look at the website for more information. www.************

    -Eric
     
  2. velocityengineer

    velocityengineer Formula Junior

    Nov 8, 2003
    492
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    Full Name:
    Eric Dahl
    Here is the front Testarossa disc.

    The pic isnt great, I will get better ones very soon.

    The front Girodisc rotor is 17.5 lb vs. 20.4 lb. for the stock.
    The rear Girodisc is 13.5 lb vs 21.3 lb for the stock. A 7.8 lb weight savings in the rear alone!

    -Eric
     
  3. cal355

    cal355 Formula Junior

    Jun 16, 2004
    383
    San Francisco
    Full Name:
    Cal
    Give the calipers a paint job and they will look fantastic!!
     
  4. ferrarifixer

    ferrarifixer F1 Veteran
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    Jul 22, 2003
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    Phil Hughes
    Cant really see in the photo properly, but are the centre cooling veins directional?

    Our testing (and Brembo recommendation) shows that the pad gas grooves work better if angled the other way, so you may have that disc on the wrong side! The cooling veins would be angled the opposite way to the grooves in the ideal situation.

    For some reason Ferrari have been using directional cross drilled discs on several models for some time, yet fit the same disc to both side. The cooling veins are non directional, but the cross drillings are patterned...just check out a 550/575 or 512TR for yourselves. First time I spotted it I though it was a cock up, but they're all like it.
     
  5. brian.s

    brian.s F1 Rookie
    Professional Ferrari Technician

    Nov 3, 2003
    3,809
    Midwest
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    Brian
    how does the E-brake work?

    regards, Brian
     
  6. enjoythemusic

    enjoythemusic F1 World Champ

    Apr 20, 2002
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    Steven
    Wish they made those for the rear of a 308QV (hint hint).
     
  7. cmparrenzo

    cmparrenzo F1 Rookie

    Mar 3, 2002
    2,687
    Kansas
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    Chris Parr
    You understand who Eric is right? Eric was one of the leading Brembo engineers in the competition depart and was with PRODRIVE Racing.... Eric is the authority!
     
  8. Tifoso1

    Tifoso1 F1 Rookie

    Nov 18, 2003
    2,606
    Pacific NW
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    Anthony C.
    I have been waiting to see someone come out with affortable (Compare to what other companies are asking for) aftermarket brake upgrades for the older Ferraris, and more specifically for the Testarossa. One question I do have, my car is a late model 1991 Testarossa, will these work on her as well(On your website, your indicate that they are for Testarossas up to MY 1990) ? TIA
     
  9. Schatten

    Schatten F1 World Champ
    Owner

    Apr 3, 2001
    11,238
    Austin, TX
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    Randy
    Also keep in mind, the price for replacing the rotors will be realtively cheap. Most rotor only configurations can run 75-175, and you'll just need to spend some time with safety wire pliers and reattaching them onto the hats correctly. Sure beats the cost of replacement rotors, which can run 300-400 a piece for the TR, IIRC.
     
  10. velocityengineer

    velocityengineer Formula Junior

    Nov 8, 2003
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    Eric Dahl
    Hi everybody,

    Thanks for the kind words Chris, let me try to answer some of the questions,

    Ferrarifixer, you have a sharp eye, the picture was taken of the right side disc mounted to the left side of the car. We were doing a quick dimensional fit-check to confirm some clearance dimensions before final mounting. So yes, the cooling vanes will normally vent the air to the rear of car in proper fashion.

    brian, the e-brake is completely stock and there is no modification. The e-brake is a small set of drum shoes that grab the inside of the bell of the stock rotors or the girodisc in the same way. Most all modern ferraris save the 360 use this system.

    Steve, got the hint, but the standard 308 rotors may be too small and are very inexpensive, so I think we will pursue an enlarged racing kit with calipers.

    Hi Anthony, it may be that I got the years wrong, this system fits all Testarossas post-centerlock wheels, and up to the 512TR. We are considering a set for centerlock Testarossas as well, but I need to determine demand.

    Schatten, you are exactly right. The replacement iron rotors will be very cost effective, about $250 including new mounting hardware.

    Hope that helps!

    -E
     
  11. MS250

    MS250 Two Time F1 World Champ
    Lifetime Rossa

    Dec 10, 2003
    26,655
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    Avvocato
    Eric, I was going to ask that question. I have an 86 with the centrelock.I am not close to replacing yet, but within the next 3 yrs they will have to be done.Any ideas of when for the 86s then?
     
  12. Prova85

    Prova85 Formula 3

    Nov 13, 2003
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    Kenny K
    Eric, count 1 for a centerlock Tr set.

    Kenny K.
     
  13. ferrarifixer

    ferrarifixer F1 Veteran
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    Jul 22, 2003
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    Phil Hughes
    thanks Eric. My wife says I have a sharp wit, but She has been blessed with a sharp tongue!
     

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