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575 GTO

Discussion in '365 GT4 2+2/400/412' started by 246tasman, Jun 25, 2007.

  1. 246tasman

    246tasman Formula 3

    Jun 21, 2007
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    Will Tomkins
    #1 246tasman, Jun 25, 2007
    Last edited by a moderator: Sep 25, 2009
    The GTO special is one we built for myself a few years back. It's on a 365GT4 chassis shortened to 2.4m. The engine is mildly tweaked and dry sumped (revs clean to 8000), then lowered 4in & moved back 8in. It tops out at about 195mph and is surprisingly stable at that speed.

    In the next couple of weeks the engine will be coming out and we'll be dropping in a 575 unit & transaxle. It will be tight but should just fit. The inlet manifold will be junked and 12 throttle bodies & trumpets fitted. It will need a 330GTO style bonnet bulge or maybe we'll fit a 250 Testarossa style perspex bubble. Another slight advantage is that the first 5 gears are a lower overall ratio than the 365 box which will be better for the circuit. I suspect the new powertrain may be lighter too. The old 365 steel gearbox and diff weigh a ton.
    I'll post you some GTO pictures shortly
     
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  3. 246tasman

    246tasman Formula 3

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  4. msdesignltd

    msdesignltd F1 World Champ
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    #3 msdesignltd, Jun 25, 2007
    Last edited by a moderator: Sep 25, 2009
    Excuse me ???...we built, just what do you do.....Body Fabrication?

    You are having too much fun, send some of that stuff across the Pond...
    What else are you hiding from us.???
     
  5. Kds

    Kds F1 World Champ

    How do you plan to set up the ignition ? The whole concept sounds interesting.
     
  6. 246tasman

    246tasman Formula 3

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    #5 246tasman, Jul 10, 2007
    Last edited by a moderator: Sep 7, 2017
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  8. ClassicFerrari

    ClassicFerrari F1 World Champ
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    This is amazing and really deserves a dedicated and detailled thread!:)
     
  9. open roads

    open roads F1 Rookie
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    What a great project.

    BRAVO !!!!!!!!
     
  10. msdesignltd

    msdesignltd F1 World Champ
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    You;re good, you are good.....
    Ithink this car should go into mass production....
    Who wouldnt want one.
    550 HP....and an 1800 lb chassis.
    and not too shabby looks.

    What would it be called a GTOMG
     
  11. 246tasman

    246tasman Formula 3

    Jun 21, 2007
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    We can't get anywhere near 1800lb. I think it will be 1150kg = 2535lb. But hoping for a bit more than 550hp. The engine will be standard internals with a good exhaust and straight inlet ports and trumpets. It will probably be 3 months before it's on the Dyno.
    I've just been offered another 575 engine and a little demon is suggesting
    getting it and eventually doing a full race version. The cam timing looks amazingly mild on the standard engine.
    It seems to be calling itself a 575 GTO.
     
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  13. Daytonafan

    Daytonafan F1 Rookie

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    That's a might impressive power to weight ratio!
     
  14. msdesignltd

    msdesignltd F1 World Champ
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    #11 msdesignltd, Jul 12, 2007
    Last edited by a moderator: Sep 7, 2017
    Yes, I meant chassis without mechanicals!
    This car will be the equivilent of the 1960's Chevy Cheetah!!!
    Power2Weight Ratio
    What type of Tyres will you be running, Old school??
    Image Unavailable, Please Login
     
  15. bigodino

    bigodino F1 World Champ
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    That 575 engine looks right at home in there. Thanks for sharing your pictures and story on this project.
    I think I've seen this yellow GTO replica for sale some years ago with Marcel Roks in Belgium. Is this the same car? Do you have the s/n? Thanks.

    Best regards, Peter
     
  16. 246tasman

    246tasman Formula 3

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    Yes, Marcel had it advertised for me a while back before I got all enthusastic about fitting the big engine.
    S/n is 23457 which is a 400GT number. The splined hubs & suspension with the solid bushes came off a 365GT4 I had at the time which then took the bolt-on hubs & rubber bush suspension from the 400. Later we lightened the suspension quite considerably. I seem to remember we lost about 32kg over all 4 corners.
     
  17. 246tasman

    246tasman Formula 3

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    It's on Michelin XWXs but I think they're too hard compound expecially with the relatively low chassis weight and I'm thinking of Avon ZZRs (sort of stickier old school) for the road.
    We've been using Dunlop M racing tyres on cast wheels for the track, but for the future it will depend on what series will let it race and what the tyre rules are.
     
  18. 246tasman

    246tasman Formula 3

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    What would it be called a GTOMG[/QUOTE]

    I'm a bit slow - the penny just dropped - very good!
     
  19. Chelle

    Chelle Formula 3
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    um, if you don't want the 575 engine I might have a home for it... any idea the weight of the 550 and 575 engines? With the M70 V12 we are at 2250lbs

    Beautiful project btw :)
     
  20. 246tasman

    246tasman Formula 3

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    Just weighed the 575 engine:
    With lighter alternator, no a/c pump, 400GT (iron) p/s pump, no exhaust manifolds, jenvey throttle bodies, no clutch = 215kg
    Standard exhaust manifolds = 38kg, Fabricated extractor manifolds = 18kg (rather shocked by this - could be made lighter)
     
  21. 246tasman

    246tasman Formula 3

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    #18 246tasman, Jul 11, 2009
    Last edited by a moderator: Sep 7, 2017
  22. #Lennard

    #Lennard Formula 3

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    We need more info and pics :D
     
  23. rossocorsa13

    rossocorsa13 F1 Rookie

    Jun 10, 2006
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    ^ What he said.

    But yummy anyway.
     
  24. SSNISTR

    SSNISTR F1 Veteran

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    Looks like an Enzo V12 in some classic....so far so good!
     
  25. FerrariF1v12

    FerrariF1v12 Formula Junior
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    modern tipo v12 with old school trumpets.
     
  26. tx246

    tx246 F1 Veteran
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    is that an enzo motor in a gto "body"?
     
  27. Sfumato

    Sfumato F1 Veteran

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    Wow. Really set back in that chassis.
    Looks like cambelts, so it's probably a Maranello motor. Haltech injection? Looks nice, really like the airbox.
     
  28. SSNISTR

    SSNISTR F1 Veteran

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    Good catch, I missed that one....
     

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