280i temparature

[440Interceptor]

Thanks for posting these. Yes there are a lot of options re fan sizes, outputs, different size or not etc, but I think I'd like them both to work without the need for a manual switch.

I'm seeing my auto electrician tomorrow so I'll be asking about current draw etc.

[440Interceptor]

Saw my auto electrician yesterday and he made some interesting points.

He doesn't recommend having two fans staggered because the one that comes on first pulls hot engine bay air through the one that's off.

Modern dual fans have a speed control so they come on progressively as the heat rises. that reduces sudden current fluctuations and also keeps the temperature in a narrower band. After market controllers are available so that's something else to explore..

[440Interceptor]

Thanks Zig, it has a new 14 inch fan on it and a shroud which seal well.Works better than minus the shroud but still not well enough on a hot day.

[440Interceptor]

But the original rad core height is 360mm or 14 1/2 inches. .

[440Interceptor]

mrzigazaga said:

Is your rad in the nosecone or engine bay?

Engine bay Zig.

[440Interceptor]

v8s4me said:

440Interceptor said:

...He doesn't recommend having two fans staggered because the one that comes on first pulls hot engine bay air through the one that's off......

How would that happen?

I guess if there's a shroud on it the working fan sucks air both through the rad and through the other hole in the shroud, i.e. the stationary fan hole. So the working fan pushes hot air into the engine bay, some of which then goes back through the stationary fan and around again and again.

[440Interceptor]

Mornin' Zig!

Let's see: CFM of fan - no I don't (yet) and I note there's a huge variation between brands and models of the same size. It is a slim line one so probably not huge CFM, but whatever it is, it ain't enough..

Rubber flaps: I agree, but no, my shroud was a quick DIY job to see if one made a difference. The only hole in the back of it is the fan hole, so maybe 25% of the surface area is flat galvo sheeting a couple of inches back from the core.

The airbox inlet was too close to the back of the shroud so I had to reverse it so the inlet faced backwards. Seems to work but longer term I'd like to fabricate an alloy airbox lid with a hose into the nose cone as you've done.