Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Necessary Modification of the Urban-cooler ?

Something that might be of interest.
Back in early 2014 I had a chat with a couple of the engineers that had been involved in the design and testing of the urban cooling fan system. Something that had been a pleasant surprise for them during their testing was that when the car is travelling fast enough for the fan to be switched off there is considerably better, as in more even, air flow around the cylinders than without the cowling leading to better cooling of the engine than without. This was very much not something that they had expected but were very happy to find and would suggest that having the fan running when the car is moving much above walking speed would be pointless and possibly counterproductive in a narrow speed band between walking speed and fast enough for any air movement it produces being overwhelmed by the overall airspeed.
Herrie, your "always on" fan in the mountains may be due to the Emerald only reading the cylinder head temperature which will always be very hot, and you might be better delving into the Emerald ECU manual to work out how to get a speed signal into one of the unused pins so as to control the fan in a similar manner to the S&S/Morgan ECU. Simply having it on a switch to be activated when in traffic might be simpler and just as effective.

Hi Calum
Thanks for your response, I was hoping you would take a look at it.
Are we the only ones with an Emerald ECU?

Yes you are right.
I looked already to some of the pages.
Additional Maps > Speed Limiter.
As far as I understand, here you can activate the speed-limiter-switch.
I understand, you can assign the Tab : "Use limiter switch to activate"
And give a value under speed-limit say : "10 MpH"

To assign a port for the speed limiter you can go to
ECU-configuration > "input-channel configuration"
And use the Tab at 'Speed Limit switch' to assign a port.
But I do not understand why I cannot assign an output channel.

I suppose you can assign one of those nice B-ports from the serial output to switch a 5 Volt relay.
On that relay - or maybe 2-relais - I suppose you can use the temperature signal output to get the Fan in a condition
Temp > 90 degr C ==> always on
Speed < 10 Mph ==> only when Temp > 90 degr C.

When this is correct - the input channel using as an output channel - I have to make a nice drawing to find out exactly how it works in theory.
And test it. The most difficult part.

But as written, that ECU problem is absolutely not a great issue.
I am so impressed with the results I have already with my new configuration: A reducing of the Temperature with nearly 50%.
To exact the temperatures S&S wants us to have.
For me only Temp is the main issue.
When I drive slowly and the Temp is > 90 degr C the Fan should go on and it does now.
When I drive slowly and the Temp is < 90 degr C it is not important.
As long as I can keep the Temp-values I have now I am super-pleased.

For me 'Parking'-timer is important too.
And I found more possibilities with the Emerald than I first thought. Interesting to test them too.
We have for weeks already horrible weather here in the Pyrenees, so time enough.

My first job now will be a smoke test - I made one myself - of the exhaust to find the a possible reason why the AFR at Starboard side is unstable.
When the exhaust is leaking before the sensor I have to weld the exhaust. Funny. At both sides we have damage at the exhaust where the suspension is.
And . . . find a Dyna service who do understand Emerald too.

Regards