915 gearbox

[Turbo Haraune]

What is the weakest link in a 915 box
how much torque can it take? wil it be good enough for a subaru turbo putting out 250-300hp?

When was it produced?

any help wil be appreciated..

Vin

[Mikey]

The weakest link is first gear. It's only supported on 1 side. The rest of the gears are supported a lot better.

As far as hp and torque, I've heard 300hp and 300torque.

I'm not even close to an expert, that's just what I've read on other post.

[CLKWRK]

Hey Mikey, I beleive thats a 901 box you are describing
Bry

[Bugat5speed]

Hi Mikey,

in fact it was the 901-gearbox that you discribed.


Hi Turbo Haraune,

the 915 easily stands up to 300 PS and 350 Nm of torque. We are running it with Subaru Turbo engines with that power and it is perfect.
The 901 and 914 are also ok, but stand less power/torque. I have customers with 2.8 type 4 engines with up to 220 PS and torque near to 300 Nm with 914s, but they do not have a turbo and by this the torque at higher revs.
We offer conversion parts for both, 901/914-gearboxes and also 915-gearboxes. For 915s we have short nose cone (-20 mm), traverses and axle flanges. Have a look at our site www.bugat5speed.de and look for Umbauteile Porsche-Getriebe (for 901/914-conversions) and look for Projekte for 915-parts

[Turbo Haraune]

This new nosecone for the 915 box... how much fwd can i move the box from its original position before it interferes with the torsion tube?

I want the gearbox to be 50mm fwd of the original position..do i have to cut the tube?

Reason for this is that the subi motor interferes with the back of the car if not moved fwd..!

What about gear linkage?

[Bugat5speed]

Hi,

as the nose cone is 20 mm shorter the distance to move forward is 20 mm. By lowering the position of engine and gearbox you can find another cm. My colleague always cut out half of the torsion tube in the past, but did not adjust anything at the nose cone. He had 5 mm space between the nose cone and the half tube then. His engine/gearbox is lowered by this 1 cm.

He told me that with the new nose cone it´s only necessary to grind the thicker ends of the tube and make them flat. It´s anyway better to drive with spring legs in such a car, than with the torsion bars.

For any other questions please contact me directly!

Cheers Martin