Caixa de Velocidades 915 (1972-1986)

Ace · #1 13-06-2013, 20:59

Citação:

Tópico Aberto originalmente por Norton

Era bom abrir um tópico sobre as 915... E tentar saber e procurar mais informação.

Óptima ideia. Abro as hostilidades com uma lista das variantes da caixa 915, ao longo dos anos. Com tempo (é muita informação a compilar) e a v/ajuda complementarei com as diferenças entre elas. (para além de corrigir eventuais erros)

1972>

TIPO ::::::::::: Nº VELOCIDADES::::::: APLICAÇÃO

915/12:::::::::::::::::: 4:::::::::::::::::: 911 T, E, S
915/02:::::::::::::::::: 5:::::::::::::::::: 911 T, E, S

1973>

915/48:::::::::::::::::: 4:::::::::::::::::: ROW
915/43:::::::::::::::::: 5:::::::::::::::::: ROW
915/45:::::::::::::::::: 4:::::::::::::::::: USA
915/40:::::::::::::::::: 5:::::::::::::::::: USA

1974>

915/06:::::::::::::::::: 5:::::::::::::::::: Carrera
915/16:::::::::::::::::: 4:::::::::::::::::: Carrera
915/40:::::::::::::::::: 5:::::::::::::::::: 911 S 911 S EUA, Carrera EUA
915/43:::::::::::::::::: 5:::::::::::::::::: 911
915/45 ::::::::::::::::::4:::::::::::::::::: 911 S 911 S EUA, Carrera EUA
915/48:::::::::::::::::: 4:::::::::::::::::: 911

1976>

915/44:::::::::::::::::: 5:::::::::::::::::: 911, 911 S - EUA e Carrera 3.0
915/49 ::::::::::::::::::4:::::::::::::::::: 911 Carrera 3.0

1977

915/60:::::::::::::::::: 5::::::::::::::::::
915/61 ::::::::::::::::::5::::::::::::::::::
915/65:::::::::::::::::: 4::::::::::::::::::ROW
915/66 ::::::::::::::::::4::::::::::::::::::USA e Japão

1978>

915/61:::::::::::::::::: 5

1980>

915/62 ::::::::::::::::::5:::::::::::::::::: ROW
915/63:::::::::::::::::: 5:::::::::::::::::: EUA e Japão

1984

915/67 ::::::::::::::::::5:::::::::::::::::: ROW - com radiador de óleo
915/68:::::::::::::::::: 5:::::::::::::::::: EUA e Japão - sem radiador de óleo
915/69:::::::::::::::::: 5:::::::::::::::::: (Turbo Look) ROW - com radiador de óleo
915/70:::::::::::::::::: 5:::::::::::::::::: (Turbo Look) EUA e Japão - sem radiador de óleo

1985>

915/72:::::::::::::::::: 5:::::::::::::::::: ROW - com radiador de óleo
915/73:::::::::::::::::: 5:::::::::::::::::: ROW, EUA e Japão - sem radiador de óleo

::::::::::::::::::

Norton · #2 13-06-2013, 21:30

Encontrei esta informação mas, não garanto nada. Pelo menos podemos ver que em cada relação havia "ratios" diferentes.

915 TRANSAXLE SPECIFICATIONS

915 RACE RATIOS

From the Porsche factory publication for racing cars:
“Information regarding Porsche Vehicles Used for Sports Purposes”
1st gear: 3.08 (12/34)
1st gear: 2.64 (14/37)
1st gear: 2.40 (15/36)
1st gear: 2.21 (14/31)
2nd gear: 2.19 (16/35)
2nd gear: 2.06 (17/35)
2nd gear: 2.00 (15/30)
2nd gear: 1.93 (15/29)
2nd gear: 1.89 (18/34)
2nd gear: 1.68 (19/32)
2nd gear: 1.60 (20/32)
3rd gear: 1.60 (20/32)
3rd gear: 1.48 (21/31)
3rd gear: 1.43 (21/30)
3rd gear: 1.38 (21/29)
3rd gear: 1.32 (22/29)
4th gear: 1.23 (23/2

4th gear: 1.17 (24/2

4th gear: 1.08 (25/27)
4th gear: 1.04 (25/26)
4th gear: 1.00 (26/26)
4th gear: 0.93 (27/25)
4th gear: 0.89 (27/24)
4th gear: 0.79 (28/22)
4th gear: 0.76 (29/22)
5th gear: 1.04 (25/26)
5th gear: 1.00 (26/26)
5th gear: 0.93 (27/25)
5th gear: 0.89 (27/24)
5th gear: 0.86 (28/24)
5th gear: 0.82 (28/23)
5th gear: 0.79 (28/22)
Ring and pinion: 4.43 (7:31) or 5.29 (7:37)
915/02

911 1972-74
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.96 (26/25)
5th gear: 0.76 (29/22)
Ring and pinion: 4.43 (7:31)
915/06

911 1975
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.93 (27/25)
5th gear: 0.72 (29/21)
Ring and pinion: 4.43 (7:31)
915/08

911 Carrera RS 1973
5-speed synchronized transaxle w/tail-cover oil pump
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.93 (27/25)
5th gear: 0.72 (29/21)
Ring and pinion: 4.43 (7:31)
915/35

911 S/T 2.5L 1972
5-speed synchronized transaxle w/tail-cover oil pump
Manufactured by Porsche (ZF)
Plate-type limited-slip differential
Rod shift
Single-plate clutch
Gear ratios: see racing ratios
915/40

911S, Carrera (USA) 1975
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.82 (28/23)
Ring and pinion: 3.88 (8:31)
915/43

911 ROW 1975
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.96 (26/25)
5th gear: 0.72 (29/21)
Ring and pinion: 4.43 (7:31)
915/44

911, 911S (USA), Carrera 1976
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.82 (28/23)
Ring and pinion: 3.88 (8:31)
915/50

935 1.4L Turbo "Baby" 1977
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Rod shift
Single-plate clutch
Gear ratios: see racing ratios
915/60

911, 911S (USA), Carrera 1977
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.82 (28/23)
Ring and pinion: 3.88 (8:31)
915/61

911SC 1978-79
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.82 (28/23)
Ring and pinion: 3.88 (8:31)
915/62

911SC (ROW) 1980-83
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.79 (28/22)
Ring and pinion: 3.88 (8:31)
915/63

911SC (USA/Japan) 1980-83
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.82 (28/23)
Ring and pinion: 3.88 (8:31)
915/67

911 Carrera 3.2 (ROW) 1984-86
5-speed synchronized transaxle w/cooler
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.97 (29/2

5th gear: 0.76 (38/29)
Ring and pinion: 3.88 (8:31)
915/68

911 Carrera 3.2 (USA/Japan) 1984-86
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.79 (38/30)
Ring and pinion: 3.88 (8:31)
915/69

911 Carrera 3.2 Turbo-look (ROW) 1984-86
5-speed synchronized transaxle w/cooler
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.97 (29/2

5th gear: 0.76 (38/29)
Ring and pinion: 3.88 (8:31)
915/70

911 Carrera 3.2 Turbo-look (USA/Japan) 1984-86
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.79 (38/30)
Ring and pinion: 3.88 (8:31)
915/72

911 Carrera 3.2 Turbo-look (ROW) 1984-86
5-speed synchronized transaxle w/cooler
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 0.97 (29/2

5th gear: 0.76 (38/29)
Ring and pinion: 3.88 (8:31)
915/73

911 Carrera 3.2 Turbo-look (USA/Japan) 1984-86
5-speed synchronized transaxle
Manufactured by Porsche (ZF)
Plate-type limited-slip differential available
Rod shift
Single-plate clutch
Gear ratios:
1st gear: 3.18 (11/35)
2nd gear: 1.83 (18/33)
3rd gear: 1.26 (23/29)
4th gear: 1.00 (26/26)
5th gear: 0.79 (38/30)
Ring and pinion: 3.88 (8:31)

Norton · #3 13-06-2013, 21:33

Verifico portanto que a 5ª relação do meu carro (caixa 915/61 de 197

é mais curta (0'82) mas ainda haverá mais variações e concerteza caixas com diferentes ratios.. Tal como as diferentes arvores de Cames para carros do mesmo ano, consoante o fabrico que existia. Será que dentro da 915/61 haverá ainda diferentes ratios conforme as séries?..humm

Portanto a 915/61 e 915/63 são mais curtas...do que a 915/62 que tem um quinta mais longa, pelo menos.

Preciso ainda de muito mais informação e muita ajuda..

AlexJ · #4 13-06-2013, 22:19

Descobri também isto:
Transmission and Clutch Overview: 930
The 930 or Turbo transmission was first used in Porsche street cars in 1975 with the introduction of the Turbo Carrera. This was a 4-speed gearbox that was much larger and heavier than the 915 which has proved troublesome when used with the 3.0 Litre Turbocharged engines. The 930 transmission is an aluminum cased unit capable of handling 326 ft/lbs of torque continuously. Racing versions with oil pumps and coolers were used in the 935 race cars that made over 750 HP albeit with shorter life spans. Turbos were equipped with a 240mm clutch to handle the extra torque that was moderately successful. There are some excellent upgrades to reduce the rotating weight and increase holding pressure in high-powered applications.

Mais uma novidade para mim! Não sabia que havia uma caixa com nomenclatura 930.

AlexJ · #5 13-06-2013, 22:22

Norton,
Se me permite a sugestão, acho que na próxima vez que colocar o seu carro no elevador, devia verificar o código da sua caixa de velocidades.
Com esse código, cruzando com a informação aqui já publicada, poderá facilmente concluir o que tem lá dentro.

AlexJ · #6 13-06-2013, 22:28

Poderá encontrar o "transmission type" na parte inferior da caixa na carcaça do diferencial junto ao "bujon".
Aqui fica uma foto que dá para ver o local embora neste exemplo, mal se veja o transmission type porque está meio apagado - lado esquerdo 915/63.

Norton · #7 15-06-2013, 1:46

Citação:

Tópico Aberto originalmente por AlexJ

Norton,
Se me permite a sugestão, acho que na próxima vez que colocar o seu carro no elevador, devia verificar o código da sua caixa de velocidades.
Com esse código, cruzando com a informação aqui já publicada, poderá facilmente concluir o que tem lá dentro.

Vou verificar!

Já tinha reparado que é a 915/61 mas o resto não vi.

Abraço

Ace · #8 15-06-2013, 4:55

0 1.jpg

Ace · #9 15-06-2013, 5:08

Da ficha de homologação/FIA (911SC Grupo 3):

0 1.jpg

Norton · #10 15-06-2013, 12:33

Citação:

Tópico Aberto originalmente por Ace

Da ficha de homologação/FIA (911SC Grupo 3):

Anexado 44608

Obrigado ACE, mais um dado..
Verifica-se que a 2ª é mais curta na primeira série 915/61 e que no SC grupo3 até aí tudo bem..depois são todas alteradas, nomeadamente a 4ª e 5ª .

Mas não consigo saber mais nada...