Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 engine oil level

and the head temp would be basically right at the exhaust and VERY hot. Exactly why the factory fan is essential.

The first B-29 engines were not quite powerful enough and so the pilots would close the cowls at takeoff to lessen the drag to have enough power to take off. This resulted in the engines needing to be rebuilt after nearly every mission. Air cooled jugs need lots of air.

Anyone who has sat at a traffic signal on a Harley on a hot day knows this

I imagine that a freer flowing exhaust will cool the puppy down as well, particularly at that engine-header connection. Or at least I hope so after just performing a bafflectomy.

Lots of little things that add up to big improvements in performance and longevity.

as well know, the bigger the engine the more heat created. Honda dealt with this in 1975 with the 1000cc water cooled gold wing (which by todays standards is tiny). Which became the 110, the 1200, the 1500 (six cylinder) and the 1800.

V-twins got larger and larger relying on air cooling. By the twin cam 88 and 96 oil coolers were a Harley add on (been after market for years) but as they got larger and into the 107 the full touring models added liquid cooling to the heads, and the striped down touring (e.g. road king) had factory oil cooling standard with a fan upgrade. The touring models also have an optional fan that sucks air past the back of the engine cooling and giving relief to the driver and rider.

Our S&S at 124 ci is as large as the water cooled Goldwing 1800. The transverse mounts is a perfect setting for air flow at speed. But this is why Morgan added the fan for speeds under 10 mph, as there is nowhere for that heat to go at idle

not necessarily, less back pressure actually allows heat to flow faster past the exhaust valves creating hotter exhaust. Both input and out put are inter-related, hence the need to recalibrate the ECU. In the old days we had to re-jet the carbs when we made major changes in the exhaust. There really is a ying and yang about all of this

06032... sent you a PM about the Skyland June trip. I could coordinate a group wine tasting at Rappahonnok (dang can never spell that) if you would like

I also performed a bafflectomy (is the word in the OED) but dont have any cooling fan. I have never noticed it go into skipfire. Being in Aberdeenshire helps, less traffic than most of England & I dont do towns very much.

For my 2013 UK spec the standard exhaust was restrictive and the headers glowed red hot at idle.



When I switched to MMC Stage 1 the headers ceased to glow so freeing up the exhaust results in it running much cooler.

I recall the BMW boxer twins having such a glow about them as well.

Is that the reason there is no cigaret lighter fitted in the car ?

A correction to my earlier post (above):

Per the parts manual, the black "puck" I referenced in my original post appears to be the knock sensor, with the temp sensor being the brass unit with two wire connector threaded into the (vehicle) left cylinder (aka front) just behind the intake manifold.