ESE's works engine tuner

[TZ350]

Heat tubes, would you call them "Air Cooling" suitable for a 125?

[TZ350]

Thermosyphon works a treat, been there, done that.

Waterjacket, couple of hoses, and a radiator. KISS.

KISS, is the last "S" for stupid? what are you trying to say?

Thanks for the tip's.

[speedpro]

The other thing is that the shroud should have diverging sides and the exit should be constructed such that the airflow around it extracts the air from within. In this way a pressure drop is created within further reducing the cooling air temp.

Plus it's a little known fact but if you pass an electric current through a bi-metallic junction in one direction heat will be created but if you pass the current in the other direction it will cool. They use this effect to cool electronic equipment. The cool junctions are attached to the bit to be cooled and the hot junctions are attached to a cool wall. The heat is just sucked out of the components. You could even make it variable to maintain a constant head temp. How trick would that be?

[Skunk]

Plus it's a little known fact but if you pass an electric current through a bi-metallic junction in one direction heat will be created but if you pass the current in the other direction it will cool. They use this effect to cool electronic equipment. The cool junctions are attached to the bit to be cooled and the hot junctions are attached to a cool wall. The heat is just sucked out of the components. You could even make it variable to maintain a constant head temp. How trick would that be?

Can you explain that a bit better for me? What's the technical name for it and I'll look it up.

[k14]

http://en.wikipedia.org/wiki/Thermoelectric_cooling They are usually referred to as peltiers.

You'd need one big mofo of a battery if you were running total loss. If you still had the generator then it may be feesible, depends how big a power drop off you get on your engine when it heats up. But seeing as its only 10% efficient at best you may be pushing shit up hill.

I think heat pipes may have a use. Pretty sure its some sort of oil in them so when is it classed as water cooled??

[Skunk]

Thanks for the link - I wasn't thinking of using it - just interested in it as I hadn't heard of it.

[gav]

I'd look at making up a radial finned head and adding a radiator type shroud/air scoop to try and divert air onto the cylinder head. Similiar to the setup used on the older air cooled MX bikes before they went to water cooling.

Radial head
http://www.mxworksbike.com/1981_RC250_2_750.jpg

[TZ350]

Thanks for the tip, we will look at the shroud you describe and the possibility of adding an electric fan.

That’s a great looking Honda MX bike there!

[gav]

Thanks for the tip, we will look at the shroud you describe and the possibility of adding an electric fan.

That’s a great looking Honda MX bike there!

I must admit I got seriously sidetracked looking for a photo for ya!
Check these awesome sites for some great old MXers!
http://www.mxworksbike.com/bikes%20a.htm

http://www.thumpertalk.com/forum/arc.../t-587186.html

Copy and paste each link into a seperate browser to view!

[TZ350]

I must admit I got seriously sidetracked looking for a photo for ya!
Check these awesome sites for some great old MXers!
http://www.mxworksbike.com/bikes%20a.htm

http://www.thumpertalk.com/forum/arc.../t-587186.html

Copy and paste each link into a seperate browser to view!

Realy great bikes, great stories, spent ages looking at them. I remember a lot of these people from reading about them at the time.

Thanks.

.

[TZ350]

.

Jan a very clever person, here at ESE sugested to me that I could use a garden leaf blower to fan the cylinder and head on the GP125.

I don't know if I will go this way but you do have to be impresed with his thinking.

As a bucketeer I feel humbled that I had not thought of it myself.

And then Thomas sugested looking at a portable battery powered vacuum cleaner.

Ooooo the cleverness of it all.

.

[speedpro]

Battery powered vacuum cleaners don't shift enough air. YOU definitely need mains power for the vacuum cleaner.

[bucketracer]

Yep your right, just pulled a 12v car vac apart. It has impressive suck but doesn't shift all that much air.

[TZ350]

Battery powered vacuum cleaners don't shift enough air. YOU definitely need mains power for the vacuum cleaner.

Have been looking at petrol driven leaf blowers on trade-me, looks like it would take $100 to $200 to get one.

Bit much, but off to Bunnings tomorrow to look at the size of them.

Found some massive heat sinks at work from an old soft starter. They have radial finning like some old mx bikes did.

[k14]

I wouldn't bother with a vaccum cleaner. Get 2 or 3 high rpm 120mm or 200mm 12v computer cooling fans. Can get some pretty good airflow and will run of a smallish battery ok.