SEHR SCHÖNER PORSCHE 912 AUS KALIFORNIEN MIT ROSTFREIER KARROSSE UND ÜBERHOLTER TECHNIK UND INTERIOR.5-GANG GETRIEBE,15" FUCHSFELGEN,TÜV+H-ZULASSUNG NEU

Nu ben ik niet technisch, maar kan een 912 met een 5 versnellingsbak?

Wat denken jullie ervan?

Bijna alle 912's hebben een vijfbak. Vierbak was standaard in 65-66 maar de optie was een vijfbak en is door velen genomen. In 67 voor de gehele productie standaard een vijfbak.

Wat denken jullie ervan?

Heeft dat dan bepaald voordelen zo'n 4 bak tegenover een 5 bak

de 1 zit gewoon recht naar voren en de 2 daaronder. Je hebt dus geen last van de dogleg 1e (links onder, helemaal tegen je been aan...) zoals de 5 bak dat heeft...

The first transmission designed for the 911 was called the 901 transmission. This unit was used in different variations in the 911, 912, 914 and 914/6. The early versions used sand-cast aluminum cases and the later ones used pressure-cast magnesium. These were 4 and 5 speed transmissions with a torque input rating of 138 lb/ft, later uprated to 148 lb/ft in 1969. The fact these transmissions have been used with engines producing more than 230 lb/ft of torque, albeit with shorter lifespans (measured in broken gear teeth), speaks volumes about the basic design. In 1970, Porsche changed the 901’s clutch actuation and called it a 911 type gearbox. These were still 901-type transmissions now coupled with a larger, pull-type clutch actuating mechanism. Clutches used in these cars were the 215mm unit used from 65-69 and the 225mm unit used from 70 to 71.

For the 1972 model year, Porsche used a larger, stronger transmission called the 915. Using a different shift pattern from the 901, this gearbox offered a torque input rating of 181 ft/lbs. Racing versions with the pump and cooler allowed this rating to be increased to 275 ft/lbs. Some people have used this transmission with the 930 Turbo engines with some success as well. 915’s were used in several variations until 1987 when Porsche introduced the G50 gearbox. Early 915 transmissions employed magnesium cases until 1977; 915 versions made in 1978 and later used aluminum cases that were stronger and had strengthened differentials.

The 915 came with two different final drive ratios, 72-74 units were equipped with 7:31 ring & pinions and the 75 and later transmissions had 8:31 final drive ratios. The 8:31 ring and pinions are significantly stronger than the 7:31 units and are the most desirable one to use for use with higher horsepower engines where service life is probably doubled. Starting in 1984, the 915 transmission used in the 3.2 911’s were equipped with an oil pump and integral cooler since the torque of the 3.2 engine could have shortened the life of the gearbox.

915 transmissions were equipped with several variations of Fichtel & Sachs 225mm clutches. Porsche used aluminum and cast iron pressure plates and spring centered discs. The ill-fated rubber centered disc was an attempt to reduce the low-speed gear rattle that all 915 gearboxes have. By now, all of the rubber centered discs should have been replaced with the noisier, but much more reliable spring center type disc.

Brandstof: LPG G3

Dan verbaasd het mij nog meer dat de eerste 911 turbo's met een 4 bak geleverd werden. Heeft dat dan bepaald voordelen zo'n 4 bak tegenover een 5 bak