Engine cooling fan.

[Porsche 2]

Can the "curved' blade fan from the later 911 engines (early 90's), which have less fan whine noise, be bolted into a 911 1977 engine?

[uwanna]

Originally Posted by Porsche 2

Can the "curved' blade fan from the later 911 engines (early 90's), which have less fan whine noise, be bolted into a 911 1977 engine?

It's been done, scroll through this thread for the details.
964 Fan on a 3,2?

[Steve@Rennsport]

Originally Posted by Porsche 2

Can the "curved' blade fan from the later 911 engines (early 90's), which have less fan whine noise, be bolted into a 911 1977 engine?

It can be done using the later fan housing, but I would NOT recommend it.

Straight-blade fans flow more air and thats exactly what mag-cased engines need. Use an 11-blade 2.4-2.7 fan with the correct pulleys for proper cooling.

[Porsche 2]

Thanks, perfect reference.