911 Cooling Shrouds - Improving Internal Air Distribution

[evilC]

Nice looking installation Andeas.

I have a querey that is open to all to respond:
In a horizontal installation like Andeas' the belt twists 90deg between bottom pully and the idler pulleys, then it twists 90deg again between the idler pulley and the fan. If the idler pully were set at an angle then the belt would not be required to twist as much. The idler pully would however, be required to be tangential to the bottom pulley (and the fan?) so that would restict its location to <45 deg (the ideal angle) but I would expect that any reduction in twist would have been beneficial for belt and idler bearing longevity. Just a thought?

Clive

[Typ Vier]

Cheers Clive,

Understand your point and you are probably right but that would mean you would have to space the idler pulleys further apart. There could be clearance issues with the distributor, possibly requires a larger bottom pulley and of course a longer belt. Larger idler pulleys could be beneficial. Would be interresting to see how it works, although probably not as compact. But then again, getting 20.000 Km's out of the belt as it is in this configuration is good enough for me

[evilC]

I agree it would not look so elegant and certainly the wider idler pulleys might be in the way since to get any real improvement they would have to be engine width apart? Alternatively, you could substitute a bevel gear for the engine
pulley and then you would only need a pair of horizontal pulleys.......................... And then onto theoretical Physics..