Using a 901 w/3.2-Any Problems? Options

[ellisor3]

I am about to install my 3.2 engine and it is being paired with the 901. I was wondering if the 901 need to be regeared or use heavier gears for this application or is the standard gearing fine?

Any other things that should be considered?

It will be for street only.

[ArtechnikA]

I am about to install my 3.2 engine and it is being paired with the 901. I was wondering if the 901 need to be regeared or use heavier gears for this application or is the standard gearing fine?

standard what?
/4 and /6 are different...

There are no heavier/thicker gears so that option is out...

In The Beginning, /6's had a shorter top gear (ZA vs ZD) than the 4's to make better use of the rev range and spin the engine a little faster for improved cooling airflow at highway speeds.

However, by the time 911's sprouted 3,2's, gearing was getting tall again - in part I suspect for highway fuel economy numbers and in part because synthetic oils could handle the heat better. I have a 915/67 from a Euro Carrera 3,2 and it is geared VERY tall in top - the better to travel the Autobahn ;-)

With that in mind, you might actually be better off with standard /4 (ZD top) gearing. The rest of the gears are actually pretty close, except for 2nd, which you can't change without finding a 914.6 mainshaft anyway...

But if you find you do need something special, Guard Transmissions is making 901 gears now - call Matt and tell him what you need...