Optimum rpm range around town and cruising around 70mph? Options

[Geezer914]

What is the optimum rpm range for cruising around town or on the highway at 70 mph?

[emerygt350]

I doubt an electric would be useful. The actual mechanical fan moves some real air at even low rpms. It's just a crazy amount of air at high rpms.

I tend to stay in 3rd in town but I do go 4th occasionally.

Now, 3rd out in the hills around 40 - 60 equals fun and pure driving enjoyment.

[wonkipop]

I doubt an electric would be useful. The actual mechanical fan moves some real air at even low rpms. It's just a crazy amount of air at high rpms.

I tend to stay in 3rd in town but I do go 4th occasionally.

Now, 3rd out in the hills around 40 - 60 equals fun and pure driving enjoyment.

true.

800 litres per minute @ 4K revs.
around about 14 cubic feet.

blowing a gale i reckon.

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and while its warming up and the flaps are closed its forcing all those litres out those crazy heater valve things with dust caps on them. i would not want to be the dumkopf who screwed around with that with electric fans. it was all worked out when it comes to volkswagens.

cruising speed in an early beetle was pedal to the metal. 60 mph. perverse reverse engineering contained the whole set up to an autobahn formula.

they dropped the ball with type 3 engines but picked it up again and kicked goals with the type 4. the golden rule is don't lug them at low revs and load. it used to be drummed into you in the 1960s and 70s.