915 or G50?

[verbeekb]

Then the G50 would be my choice, it will allow much faster shifting, but it is big though.. more expensive, hard to find, it is very popular among Porsche owners as well. Another good candidate would be a 923 transmission out of a '75/'76 912E .. that comes with the correct throwout arm etc ..

[airwerksvw]

Is the 923 a 4 or 5spd?

[verbeekb]

The 923 is in fact a 5-speed 915 which is adapted for use with the Type4 engine of the 912E

the problem is tha the 915 gearbox is more heavy than the original gearbox, and the G50 is more heavy than the 915....

[Wally]

Then again, if your engine is so strong that it will break a certain model gearbox, the extra weight of a stronger one might be the only logical choise...