Has Anyone Tried a M.M. Billet Head ??

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Now that the billet heads are available i'm wondering if anyone has one.
I do have one but it didn't work out so well in my case.
I ran with a NGKB7S Plug but it runs way hot.

I have thought of trying a B8S but i got a different head so i haven't used it for a wile.

What plugs are you guys running and what are your results.

Thanks
Riding Rich
 
I dont know the anwser to your questions but i think billet heads run yo hot because the air just runs thro it, its not like a standart one that is porous so it causes turbulence making the air get all the heat out of it:unsure:
at least that what happens when you polish a connecting rod to mirror finish, it over heats :cry:
so i think pirates or what ever make it is they should make it by sand casting so make it porous and also a few more fins in near the plug like this bike:
 

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I dont know the anwser to your questions but i think billet heads run yo hot because the air just runs thro it, its not like a standart one that is porous so it causes turbulence making the air get all the heat out of it:unsure:
at least that what happens when you polish a connecting rod to mirror finish, it over heats :cry:
so i think pirates or what ever make it is they should make it by sand casting so make it porous and also a few more fins in near the plug like this bike:

Yes i agree about the runnung hot.
Allthough you can get more heat out of the engine by using a colder heat range plug.
I run a Puch Hi Comp head, like the pic you show the fins are much bigger.
Also the fins down the center of the head allow for the air to travel through.

The funny thing is the Puch Head has a combustion chamber that is a little over 5cc. 2cc less than the MM billet head but it still runs cooler.

Hopefully i can get this MM Head running good.
Seems a few people are having some trouble.
 
probably the flow in the punch head is not as good due to the side fins no being pararel to the airflow
your head comes from an flat engine like in the picture but you need to find one that has all the fins pararel to the airflow like the second picture(up right engine)
and last thing, have you got the measurements (from hole to hole ) of a HT head and i will see if i can find one in my old cylinder head box in the garage(got tones of 50cc heads there :rolleyes:
good luck

G-Superior :D
 
Yes i will measure it up.

Anyway that puch head runs fine.
Yes it would be better if the fins ran across.

But it is mcuh better than hardly any fins at all.

I will calculate the total surface area of all three heads and post it here.
 
why not machine the stock head. Heck you could probably take about .010of an inch off and be fine. You could even sand the head down over a piece of glass. Is anyone doing this? Ive thought about doing it to mine.
 
I have done those things.

A stock head has 8cc combustion chamber and barely any squish and not much for fins.

MM head has 7cc combustion chamber and a good squish band.

Puch has a 5cc chamber good squish band and a ton of big fins.

If you sand the ring off the stock head you might run into trouble with the gasket sealing.
 
Just wondering, do you reckon that roughening the fin surfaces of a smooth billet head might improve cooling? (More surface area.)
 
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