Project Stumpbroke MS362

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I went over to a fellow members house today. We matched up his MS460 against this 362 for grins. The 460 has had the base gasket removed, muffler mod, & a fresh piston & rings. Both saws are running the same 28" B&C. This wood was a very dry dead oak that he droped today. The outer ring looks soft, but still pretty solid.

Atvguns MS 460
[video=youtube_share;qAUywyfH7hM]http://youtu.be/qAUywyfH7hM[/video]

Stumpbroke 362
[video=youtube_share;7U5Y1NcZMQA]http://youtu.be/7U5Y1NcZMQA[/video]
 
Stumpy great work my man, sounds great in the cut!!!!!:bowdown:

When it comes to the coils, I'm still not a 100% sure they are limited or not, I can get my 362 to turn as fast as I dare 14,500 or better. However it sure does sound like a limiter kicks in at WOT every now and then, it's not like a normal limited coil. I've had the same experience as you with tuning, just when you think it's spot on you go to cut something and it loads up in a bad way and sound just awful. I have questioned if this a function of the strato engine itself or simply the coil. One thing I know for sure is these coils have a steep advance, I wouldn't mess with other coils at this time IMHO.

Andre:cheers:
 
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The highest I could get this thing to turn was 13,800 before it would start limiting out, but when I stuck it in the wood at that setting it would load up in a matter of seconds & almost die. I had to lean it out roughly 1/4 turn on the H side. I don't think I'll gain anything by useing an unlimited coil. It would just be for testing purposes to see what this thing is actually turning. I'm satisfied with the tune & the build as a whole.
 
Stumpy: Have you checked the timing to know it's doing at rev limit?

No not with a timing light, just watching the tach in & out of the cut. I can ease off of the pressure with the way it's set now & the tach will read steady till almost 14,000. Then it drops the rpm reading on the tach. Telling me that the coil is cutting out.
 
RPM Up and Down

No not with a timing light, just watching the tach in & out of the cut. I can ease off of the pressure with the way it's set now & the tach will read steady till almost 14,000. Then it drops the rpm reading on the tach. Telling me that the coil is cutting out.


Stumpy I sent you a PM.
 
The outcome of the 460 vs 362 is about what I was expecting after running a 25 on my 361 and 441 M-Tronic yesterday. I wish I had a camera to make videos. I would like to have had a picture of my face.
 
Thought I'd fallow up with what I found out about the coils. I have a 361 here now & swaped the coils out. Direct fit other than the kill wire tab wasn't long enough, but that's not a big deal to correct.
As I aid before the main reason I wanted to try the unlimited coil was to satisfy my curiosity. I noticed no difference in power in the cut, just like I figured. The only thing I gained was being able to see what the max no-load rpms were. I swaped coils & warmed up the saw & it was turnin around 14,200. This is where the saw ran the best while tunin it with the limited coil. It would still fourstroke @15,000. I reset it back down to 14,300 & swapped out the coils again.

I can now send this saw back to Matt so he can play with it. Here it is all cleaned up & ready to ship.
100_1278.jpg
 
Finally got a chance to run It today and I do have to say this 362 is like a whole new saw. More like a 440 good job stumpy can't wait to see how the 372 turns out.
 

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