mweba1 posted this ...
I've read that those can be used for resetting at least some of the Mtronic saws as well, but I don't remember what it takes to do it?
lts funny how some models respond to muff modds. The 550xp many say makes quite a big difference but its not so much of a suprise nowdays when no gains are achieved. Quite a few of my new saws dont take well to it however the louver gills Brad did for me on a saw do keep your hands nice and toasty warm when holding the saw on its side. Its not whitefinger l worry about now its crispyfinger you gotta watch out for.A gutted 555 muffler will make it real loud. I don't know if I would gut one completely if I had another one.
My 550 is muffler modded only. It's real low.on my list of wants to spend time to port it.lts funny how some models respond to muff modds. The 550xp many say makes quite a big difference but its not so much of a suprise nowdays when no gains are achieved. Quite a few of my new saws dont take well to it however the louver gills Brad did for me on a saw do keep your hands nice and toasty warm when holding the saw on its side. Its not whitefinger l worry about now its crispyfinger you gotta watch out for.
You won't notice any gains on the 60cc saws as the amount of metal inside the muffler is stupid! Also the ports are tiny, so that doesn't allow much of a mod until the saw itself is ported. I'm interested to see what brad does, as I'll be porting my 560xp soonSo does Autotune turn down any rpms that could have been gained with the muffler mods ? Not letting you get gains like the older carb saws ?
I haven't read any tech article on AutoTune, but here's how MTronic works. The tach in the coil monitors RPM multiple times per second. It signals the servo that replaces the H needle in the carb to either add or pull fuel. Depending on how that affects RPM, it will make another adjustment, thereby constantly tuning for max RPMs. There are no other parameters besides RPMs for WOT tuning. It knows nothing about O2 levels, MAP, or the like. It knows nothing about timing. Timing is fixed with preset values, also based on RPM. It is not adjusted real time like the fuel. It has set parameters. Hereby, the saw is capable of tuning itself for changing weather conditions, fuel quality, porting, etc. As these variables affect fuel needs, the saw senses it through how fueling changes affect RPMs, and adjusts accordingly. It really is just that simple.
U sure about that Don? [emoji8]Likely the smallest 60cc saw on the market. Looks nice, Brad!
The previous model, 262xp was/is faster than a 357xp, as is the recent model, 562xp.
But my ported 357xp can whoop em all.
Bar mount pattern (555 is k095, 562 is d009)so what specifically are the differences between the 555 and 562
Yes, similar to the 365/372, but afaik you can't buy the covers separate.If i remember correct,the cyl has the same casting # on them.the difference is the transfer covers.
I think that is what Mitch told me.
I said 'on the market'. Is yours for sale? That is still the coolest saw I've ever seen!!!U sure about that Don? [emoji8]
By that comment I meant my 2260 that I raced you with in the tweener races!I said 'on the market'. Is yours for sale? That is still the coolest saw I've ever seen!!!
Thought ya meant Squeak.By that comment I meant my 2260 that I raced you with in the tweener races!
That little button on top is handy!Love my 2260 but be careful with the recoil an decomp. Did this Sat......broke the post clean off!
I'm a little slow, but gotcha now. I want a rematch! The 357xp is faster now.By that comment I meant my 2260 that I raced you with in the tweener races!
Enter your email address to join: