Muffler Testing on a ported 660 - need opinions!

[Redbull661]

.

 

[mdavlee]

1 sounded lean coming out of the cut. 2 and 3 were better.

 

[junkman]

I need my phone app updated it is not reading the rpms right .

 

[cease232]

I'd have to say #3


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[RI Chevy]

How about a photo of each muffler and an explanation of what was done. What are you looking to accomplish?

 

[Moparmyway]

Having a tach on the handle says a ton more than opinions from videos. I've seen firsthand how a saw sounds sooo much different in person than in the same video.

Get a few Hardlines and see firsthand what I'm saying

 

[junkman]

they are all running 13400-13500

Where are they in the cut loaded? 9200?

 

[RI Chevy]

Cool mods. I thought 2 and 3 were much better than 1. My preference was mod #2, but I would richen it up just a tad. Mod#3 was definitely 2 stroking the best.
With the videos it seems that everything sort of matches up. Makes more sense.

 

[Locust Cutter]

I like 3 the best, though the saw sounded a bit lean (for me) in all three cuts. I understand probing the machine's capabilities, but I usually run them a bit fat for conservation's sake. Either way, they seemed to be hauling the mail.

 

[Deets066]

I vote for vid 2, ......, before I knew what was done to them

 

[dall]

2 seemed smoother to me

 

[mdavlee]

2 was the best sounding in the cut. 1 and 3 weren't bad but I think 1 may have been a little faster if it was a little richer.

 

[jk14]

I vote for #3. Although it's kinda hard to really know what it actually sounds like when you're listening to a saw through a cell phone's crappy ass little speaker.

 

[Mastermind]

Tune is everything....

 

[Moparmyway]

they are all running 13400-13,500

Thinking I'll try .404...load things up a bit.

Maybe they all dont want to run at 13,400-13,500 ?
Maybe none of them like it best there ............

 

[super3]

^^^^
This.

 

[junkman]

And this^^^^^^^
Optimum tune for a gutted one may not be the same as a baffled one, in my testing with tuned to run the best I found gutted one to make more power on a ported saw, but I would prefer a little quieter if runs pretty close

 

[Mastermind]

What we are getting at is simple J. You might have to try a higher or lower tune to take advantage of the different flow characteristics of each muffler. Your testing has opened a lot of eyes, mine included, but to just cover a single rpm range is less than conclusive in my humble opinion.

 

[Keith Gandy]

I need my phone app updated it is not reading the rpms right .

Lol!!! Call 1-800-Chris PA

 

[RI Chevy]

More fuel sometimes means cooler running motor.
To lean, it heats up, a little richer is usually better.