Which filter is best? MS460

[Moparmyway]

I'm used to getting up early Eric. Contemplating how I could work out getting to the Pennsylvania GTG. I'll be starting on a couple of new Oregon chains here soon.

I also gave my weeks notice to my boss, starting a new and rather large job 01 June ....... The wheels never stop spinning, no matter how tired I am !

 

[malk315]

I'm used to getting up early Eric. Contemplating how I could work out getting to the Pennsylvania GTG. I'll be starting on a couple of new Oregon chains here soon.

I also gave my weeks notice to my boss, starting a new and rather large job 01 June ....... The wheels never stop spinning, no matter how tired I am !

That's the way to be. Mind never stops going but can be a pita when you want to sleep. Congrats on the new job. Over last 6 months I've spent 2 in China... flip the clock by 12 hours total reversal each time!

Gonna check out when PA Gtg is now. WAF may be a problem though (Wife Acceptance Factor)

 

[Moparmyway]

That's the way to be. Mind never stops going but can be a pita when you want to sleep. Congrats on the new job. Over last 6 months I've spent 2 in China... flip the clock by 12 hours total reversal each time!

Gonna check out when PA Gtg is now. WAF may be a problem though (Wife Acceptance Factor)

Anything over 8 hr adjustments just plain sucks !

WAF is exactly what drives the wheels into overtime !!

I've decided to add a honey-do list for her, since she sees fit to just keep mine full.

#1 on her list is going to be to clean my saws and car so I can get to the Pennsylvania GTG. I'm willing to bet that she starts waking up early tomorrow morning

 

[paragonbuilder]

Oh so THATs what was going on. I was just watchin the red numbers. Your ear is thus calibrated at around 14,300

Yeah I was wondering if it would tune higher with more flow. That's why I was checking...
Another thing to consider is, I just realized this, I wasn't testing free load max rpm...the Dyno puts a load on the saw even with no brake...so this is probably why my saw was tuning at 15k at my house and 14.3 on the Dyno! I was thinking elevation but I think it was the partial load.

 

[MustangMike]

Then it is scary that 044#1 was near 16,000!

 

[paragonbuilder]

Then it is scary that 044#1 was near 16,000!

Was it tuned there? If it's 4 stroking I wouldn't worry about it. They tune where they tune.


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[jmssaws]

Was it tuned there? If it's 4 stroking I wouldn't worry about it. They tune where they tune.


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Exactly

 

[mdavlee]

Yep. I've seen almost 17k from some bigger saws. Kind of scary but they weren't totally screaming lean.

 

[jmssaws]

After porting my 084 I tuned it by ear and finally checked with a tach and it was 14300, the hair stood up on me.

 

[MustangMike]

I fattened the high before I restarted it, but it did not like the fattening! I put the tach on it and tuned it at 15,000, it seems happy there. I would rather be a little rich than a little lean. Tuned under 15,000, it is hard to get rid of the 4 stroking even in the cut! That dang old saw likes to run!

 

[malk315]

Then it is scary that 044#1 was near 16,000!

Ahh -- now I get what was going on. The mass of the brake and such does put a load on the saw.
Bill had pressed on a new hub for Sunday that will house more magnets for RPM sensing -- that will have added some more load. So two variables since Jason's 064 was on it at Dan's: 8 pin sprocket and a bit more mass on the hub.

If tuning with the small load to where it's still 4 stroking on the dyno is of no harm then that's cool.
Otherwise it may be best to take the dyno chain off while tuning and then put it back on for testing.
That would make trying lots of different things take time.

Even w/ hydraulic and no restriction in flow, the pump itself would put some load on, probably not as much as a rotor and hub.
One good thing is the saw has a 5:1 mechanical advantage to spin the load so it should help with not feeling like a big load for the saw since the saw spins 5 revolutions for every 1 revolution of the brake / hub / large sprocket..

Just thinking out loud here.

 

[jmssaws]

The 440 I just sold tunes at 15500

 

[mdavlee]

665 was 15.4k yesterday. It was on the edge of 4 stroke. It made more power in the 5 cants at 14.2k. Was faster tuned by ear in the single by a good bit.

 

[mdavlee]

The 440 I just sold tunes at 15500

Hybrid I ported was like that. Under that and it was just rich. They sure do like to rev when tuned by ear. One reason I use a tach for work saw settings. Try to keep them cooler for long cuts.

 

[jmssaws]

The 2171 I did for @MG2186 will tune at a insane rpm. Damn husky

 

[jmssaws]

Hybrid I ported was like that. Under that and it was just rich. They sure do like to rev when tuned by ear. One reason I use a tach for work saw settings. Try to keep them cooler for long cuts.

My 064 tuned by ear is generally to fast.

 

[mdavlee]

The one I put together the other day was 14.3k with a nice 4 stroke when I checked it. I was suprised since it's not ported at all. Just gasket delete and squish trimmed about. 010".

 

[MasterMech]

Ahh -- now I get what was going on. The mass of the brake and such does put a load on the saw.
Bill had pressed on a new hub for Sunday that will house more magnets for RPM sensing -- that will have added some more load. So two variables since Jason's 064 was on it at Dan's: 8 pin sprocket and a bit more mass on the hub.

If tuning with the small load to where it's still 4 stroking on the dyno is of no harm then that's cool.
Otherwise it may be best to take the dyno chain off while tuning and then put it back on for testing.
That would make trying lots of different things take time.

Even w/ hydraulic and no restriction in flow, the pump itself would put some load on, probably not as much as a rotor and hub.
One good thing is the saw has a 5:1 mechanical advantage to spin the load so it should help with not feeling like a big load for the saw since the saw spins 5 revolutions for every 1 revolution of the brake / hub / large sprocket..

Just thinking out loud here.

Is the load controllable enough that you could tune under load?

 

[paragonbuilder]

Is the load controllable enough that you could tune under load?

You could essentially choose an rpm you want to start 4 stroking at under load and set it there. It gets very hard at lower rpms to hold steady the way it is right now.


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[malk315]

Is the load controllable enough that you could tune under load?

If by controllable you mean it doesn't vary, then it is well controlled since it doesn't change (caliper not grabbing and saw is just spinning the weight of the sprocket, hub, shaft and brake rotor).
Flywheel effect of the mass of all of that should mean not much should be needed to keep it spinning once at cruise speed. When accelerating it will be putting a decent load on it getting all of the mass up to speed.