Ms 150 exhaust mod vid

[TGB]

... Bloody engineers.

That made me splutter my coffee ;-)

[spudulike]

That made me splutter my coffee ;-)

 

It was probably aimed at people who like downloading an app or pressing a button to make everything in their world be perfect.

 

In this game, someone has to break a machine down, make adjusments and measure improvement. You have to measure degrees and have files small enough to make a small reduction in size and a way of tightening the central nut so the advance stays in place!

 

Some lead and some follow - I have seen many follow what I do but few acually come up with new innovation. There are a few modifications I haven't mentioned that can be done and I do but others seem not to know:sneaky2:

 

Brad has spent much of his time devloping improvements - why pass on all the techniques he has fought to develop!

 

I like the sarcasm:thumbup:

[Eddy_t]

Looks impressive. You drilled one hole. Do we know how it compares with two or three or four holes?

 

 

I once did the maths regarding the 200t muffler mod, some were drilling 2 x 8mm holes, whilst the most historic version (and the info that bought me here in the first place) was one 12mm hole. The 12mm hole actually turned out to be the larger outlet. The area of the single 9mm is 63.6mm^2, whilst the twin 6mm holes most prior have done is 56.5mm^2. A 10mm hole actually gives 1mm more area than 2 x 7mm.

 

More (smaller) holes will produce a quieter saw as the gas doesn't escape out of one hole at once, instead it acts similar to the internal baffle. That works up to a point, my 357 has more holes in the can than metal now and quite easily overpowers the chipper within 30m!

[jeanesy]

Do a few cuts, remove plug and look at the colour. Replace plug do a quite a few more cuts, remove plug. Adjust carb according to the colour of the plug.

 

 

Cheers rich. I remember you showing me that in Oslo but I couldn't remember exactly. 👍

[Hats]

What's the biggest size hole you can drill in the muffler without then having to adjust anything? 6mm? And leave it or can you get away with an 8mm or can u not get away with anything and you have to adjust the carb whatever? It just seems to run real nice ATM and I don't want to spoil it. Cheers H

[Gerbutt]

I did a 7mm in mine and it didn't need adjusting, runs fantastically. Make sure you do check your plug though whatever size you use.

[Hats]

Cheers mate I think I'm going to do a 6mm and monitor it. H

[Ian C]

I put a 6mm hole in mine 18 months ago and it runs great, no tuning.

[Dog Tag]

Is it best to put the new appiture beside the existing one?

[Darrin Turnbull]

Here's a video I've found.

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