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Thread: Q4 gearbox

  1. #26
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    Thanks for the link, I never saw this one. He has some nice straight cut gears I see, but I think it's just an OE casing painted, the end cap looks interesting - I can't tell what it is or why he has done it:
    http://www.zica.it/galerie.php?lan=e...=861&&galid=18

    If you can find out more it would be great!

    I don't think this is sequential, there is a guy in Andorra who races a 'grale with a sequential 'box - Colotti or Bacci (can't remember which) It was very expensive and took many hours to convert.

  2. #27
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    Colotti always had great part and as far as I can tell he has the best {quite expensive but worth all the money} gearbox replacement for the old Alfa's {Bertone and 75}.
    In a race 75turbo car we measured well over a second of gain in a 3,7Km hill climb. And there was no need to change the gearbox casing. As for the Bertone, they are 10000000% recommended for their "inesti frontali' gearbox. Kick a lot with that but engine rev as an electric motor and changing gears is much-much-much faster than the oem one and the Autodelta GTAm one.

    Bacci Romano have great stuff too and I believe he is not that expensive as Colotti

    Nick

  3. #28
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    About the Fiat Coupe 5:th gear: Same gear ratio as 155 Q4
    About 5:th gear acceleration: Well, you can't have all. You will almost never ever use 5:th gear at the race track, so for that sake you won't need the lower 5:th gear ratio.

    About pictures on my upgrade: Sorry I don't have any. When you remove front left wheel you see the gearbox and the M6 screws that should be removed. Then you replace the gears as follows:

    32 -> 30 teeth
    35 -> 37 teeth

    /A
    Last edited by #84; 09-01-09 at 09:18.

  4. #29
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    Quote Originally Posted by #84 View Post
    About the Fiat Coupe 5:th gear: Same gear ratio as 155 Q4
    About 5:th gear acceleration: Well, you can't have all. You will almost never ever use 5:th gear at the race track, so for that sake you won't need the lower 5:th gear ratio.

    About pictures on my upgrade: Sorry I don't have any. When you remove front left wheel you see the gearbox and the M6 screws that should be removed. Then you replace the gears as follows:

    32 -> 31 teeth
    35 -> 39 teeth

    /A
    This explanation should do it too..
    Thank you very much..
    Alfa Romeo 155 Q4 Widebody - 1995 - Blue Nord Metal - See garage

  5. #30
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    So I ordered these two gears today, and the total cost will be around 1100,- dkr, approximately 150 euro, my supplier had to get one of them from Italy so they will be delivered sometime in the beginning of next week..

    But no problem to order them though..

    Almost can't wait to have this mod installed!
    Alfa Romeo 155 Q4 Widebody - 1995 - Blue Nord Metal - See garage

  6. #31
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    Quote Originally Posted by Ditlev View Post
    So I ordered these two gears today, and the total cost will be around 1100,- dkr, approximately 150 euro, my supplier had to get one of them from Italy so they will be delivered sometime in the beginning of next week..

    But no problem to order them though..

    Almost can't wait to have this mod installed!
    Lets hear about the result!
    Regards...

    RMB-Racing
    Ronnie Bonde
    Denmark

  7. #32
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    Quote Originally Posted by RMB-Racing View Post
    Lets hear about the result!
    You sure will..
    Alfa Romeo 155 Q4 Widebody - 1995 - Blue Nord Metal - See garage

  8. #33
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    Could you do a before and after rev check, perhaps at 75 and 100mph (120 and 160km/h) please?

    Mine currently sits at something like 4200 for 100mph and gets a bit tiring on long runs, very interested in this and the difference it might make.

    ...and of course the top speed will be increased

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  9. #34
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    Quote Originally Posted by wrinx View Post
    Could you do a before and after rev check, perhaps at 75 and 100mph (120 and 160km/h) please?
    Yeah, I will do a rev check before and after..

    Quote Originally Posted by wrinx View Post
    Mine currently sits at something like 4200 for 100mph and gets a bit tiring on long runs, very interested in this and the difference it might make.
    I have the exact same problem, and that is the reason for changing..
    Alfa Romeo 155 Q4 Widebody - 1995 - Blue Nord Metal - See garage

  10. #35
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    Now the paint job on the gearbox is finished.

    Here is the result:
    Attached Images Attached Images
    Regards...

    RMB-Racing
    Ronnie Bonde
    Denmark

  11. #36
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    Looks better than new!

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  12. #37
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    Do the bolt heads black

  13. #38
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    Quote Originally Posted by AlfaJack View Post
    Do the bolt heads black
    That would be the ultimate finishing touch

    Greetings,
    Marc
    In a world full of compromise...
    ...some don't.
    ___________________________
    Opel Astra Sports Tourer 110HP 2017
    Alfa 147 1.6 16V 120HP
    Alfa 155 Q4 2.0 16V turbo

  14. #39
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    Quote Originally Posted by #84 View Post
    You just unscrew the end cover of the gearbox and you find the 5:th gear just in front of you. The gears are locked to the shafts by a nut (don't know the size) so unscrew the nut on each shaft, remove the gears and put in the new ones. No new gasket is needed since "silicon glue" is used from factory.
    This are the 2 ones that must be changed?
    (from a Delta but similar)


  15. #40
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    I know it is a "old"post but i hope it is ok i post here instead of making a new thread.

    Does anyone know place where you can get First 3 Gear.as grp N reinforced gears

  16. #41
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    Quote Originally Posted by kepsus View Post
    Does anyone know place where you can get First 3 Gear.as grp N reinforced gears
    First welcome to Berlina Sportivo
    Maybe you can introduce you Q4 in the member section on this forum?

    Interesting question
    Unfortunatly I don't know the anwser.

    Greetings,
    Marc
    In a world full of compromise...
    ...some don't.
    ___________________________
    Opel Astra Sports Tourer 110HP 2017
    Alfa 147 1.6 16V 120HP
    Alfa 155 Q4 2.0 16V turbo

  17. #42
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    Welcome to the forum. Now is it actually the gears that break or the housing? If its the housing then EvoDelta might have something for you..

  18. #43
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    i have the strenght plate, and also a longer 5 gear. but it was more the 1,2,3 gear i woud lik to have upgraded

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  20. #45
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    www.scara73.it
    that works a little better

  21. #46
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    Quote Originally Posted by #84 View Post
    About the 5:th gear:

    The standard gear is calculated to result in a speed of 238 km/h @ 6500 rpm
    The gew gear is calculated to result in a speed of 274 km/h @ 6500 rpm
    At 140 km/h the difference is exactely 500 rpm with the same calculation.

    My rev limiter is set to 7200 rpm ... = 303,5 km/h .....

    The part numbers are 7757955 and 7757956.

    You just unscrew the end cover of the gearbox and you find the 5:th gear just in front of you. The gears are locked to the shafts by a nut (don't know the size) so unscrew the nut on each shaft, remove the gears and put in the new ones. No new gasket is needed since "silicon glue" is used from factory.

    Happy New Gear

    /A
    Sorry to start up in this thread again, but i have bought those two part number, and they do not fit in my gearbox, .. my shaft are thicker.
    Last edited by kepsus; 09-12-08 at 17:32.

  22. #47
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    Perhaps this will help?

    P/n - 7757955 (No. 16 in picture 1)

    (FIAT) - 1D UNO MONDO (1995-....)
    (FIAT) - NX PUNTO D-TD (1993-1997)
    (FIAT) - 1B PUNTO TB.DS. GAMMA'97 (1997-1999)
    (FIAT) - NT TIPO MAQ.93 D-TD (1993-1995)
    (FIAT) - NJ TEMPRA MQ.93 D-TD (1993-1996)
    (FIAT) - PU MAREA DIESEL (1996-1999)
    (FIAT) - 2A SIENA EXTRA EUROPA (1997-2002)
    (FIAT) - 2L SIENA EXTRA EUROPA REST.(2002-..)
    (FIAT) - PY PALIO/WEEKEND EUROPA (1997-2002)
    (FIAT) - 1Y PALIO WE EXTRA EUROPA (1997-2002)
    (FIAT) - 2K PALIO WE. EXTRA EUROPA REST. 2002
    (FIAT) - 1X PALIO 2V EXTRA EUROPA (1997-2002)
    (FIAT) - 2H PALIO 2V EXTRA EUROPA REST. 2002
    (LANCIA) - SQ N.DELTA TB/DS (1994-1999)
    (LANCIA) - RZ DEDRA TURBO DIESEL (1989-1994)
    (LANCIA) - SN DEDRA FL.94 T.DS (1994-1999)
    (ALFAROMEO) - U1 145 BZ/DS (1994-1996)
    (ALFAROMEO) - U2 146 BZ/DS (1995-1996)
    (ALFAROMEO) - T5 145 GAMMA 97 (1997-1999)
    (ALFAROMEO) - T6 146 GAMMA 97 (1997-1999)
    (ALFAROMEO) - T4 155 GAMMA 96 DS (1996-1997)
    (FIAT) - 1G STRADA (1999-....)

    ...and P/n - 7757956 (No. 5 in picture 2)

    (FIAT) - 1D UNO MONDO (1995-....)
    (FIAT) - NX PUNTO D-TD (1993-1997)
    (FIAT) - 1B PUNTO TB.DS. GAMMA'97 (1997-1999)
    (FIAT) - NT TIPO MAQ.93 D-TD (1993-1995)
    (FIAT) - NJ TEMPRA MQ.93 D-TD (1993-1996)
    (FIAT) - PU MAREA DIESEL (1996-1999)
    (FIAT) - 2A SIENA EXTRA EUROPA (1997-2002)
    (FIAT) - PY PALIO/WEEKEND EUROPA (1997-2002)
    (FIAT) - 1X PALIO 2V EXTRA EUROPA (1997-2002)
    (LANCIA) - SQ N.DELTA TB/DS (1994-1999)
    (LANCIA) - RZ DEDRA TURBO DIESEL (1989-1994)
    (LANCIA) - SN DEDRA FL.94 T.DS (1994-1999)
    (ALFAROMEO) - U1 145 BZ/DS (1994-1996)
    (ALFAROMEO) - U2 146 BZ/DS (1995-1996)
    (ALFAROMEO) - T5 145 GAMMA 97 (1997-1999)
    (ALFAROMEO) - T6 146 GAMMA 97 (1997-1999)
    (ALFAROMEO) - T4 155 GAMMA 96 DS (1996-1997)

    wrinx
    Attached Images Attached Images
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  23. #48
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    better to see here

  24. #49
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    Who have made this mods, and get it to work ?

  25. #50
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    Might be worth you sendin #84 a private message in case he doesn't visit here very often

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

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