the_troupster said:
Remember the fan likes revs...
With a higher ration 'box you're asking the engine to make the same about of power(heat) at a lower rpm, thus the fan is not cooling the heat as much as it would at a higher rpm.
I think traveling with the lorries is the best 'speed' as then you're not getting in peoples way. On the motorway that is. On 'A' roads I do tend to slow down a little if I can to (as mentioned previously) ease the strain on my ears. (I must get that sound deading/insulation in one day soon!)
Jim
Sorry to bring up an old topic, but I tried to figure out what a good cruising speed was. I tried a 200 mile trip with a stock 1600 To engine in a 7t.Westy.
Doing 50, the engine purred happily on, raising the temp to 110C. Revving up to 55 raised the temp to 115C. That still wasn't enough to keep up with the lorries, so tried getting to 60, but that raised the temp even higher.
I always heard 120C was a no-go on air-cooled engines, so here's what I'm at:
1 cruising at 68 seems plain impossible to do.do. I can get to 60, but keeping this as cruising speed seems to overheat the engine
2. could my temp sensor be off? Or am I interpreting it wrong? It's a dipstick model
3 the engine's been rebuilt 3 years ago. But I don't think it's missing any tinware...
4 The fan likes revs, but revving too high generates too much heat for the fan to handle.
Reading all your stories here, I guess something is wrong.
Can anyone shed some light on this?