Redfin Built MS661 meets the Bark Box

[Definitive Dave]

This started when I posted a few pics of my Redfin MS661 on Facebook a month or so ago and some yahoo chimed in with his sage advice "it will be at least 10% faster with a Bark Box" or something to that effect.
I noticed that the HP and power claims on the BB website had decreased after they submitted a sample for dyno testing. I got it in my head to try this " Super Power Bolt On Upgrade" myself so I ordered one and had it sent to Kev's GTG in Michigan. We never got around to testing it there, we were having too much fun. I finally tested it this last weekend, here are the results.

Redfin ported MS661 with Redfin 3 port muffler and standard muff cover on 20% Nitro - 15,879rpms WOT Stihl EDT-9, 122.9F Laser Thermometer muffler case after cuts, 131.7db digital SPL meter WOT 6" from muffler front - cuts 1.3s/1.21s/1.33s

ADD BARK BOX COVER to above - 14,579rpms, 138.2F, 130.9db, 1.26s/cutout/1.33s

No Muff cover on above - 14,818rpms, 134.8F, 131.7db, 1.33s/1.2s/1.2s

Redfin muff, standard muff cover on 87 Octane 10% ethanol 32:1 Bel Ray H1R - 14,571rpms, 278.1F, 130.9db, 1.56s/1.4s/1.3s

There are things I would change if I was to do this type of test again. Having a second person to do the temp test would be ideal, it is a lot of fumbling around to grab the temp as quickly as possible after the cuts.
I also have a standard new OEM MS661 muffler on the way for testing.
Apparently my tuning on the Methanol and Nitro in the vids is terrible, so that needs fixed.
I should also try the testing with a stock and standard ported/carbed MS661.
Any other suggestions welcomed.
Dave

 

[RI Chevy]

Nice Dave...
Love the testing...
Now you just need a nice pipe...

 

[redline4]

A second person would help the deviations in the variables.

 

[Czed]

This started when I posted a few pics of my Redfin MS661 on Facebook a month or so ago and some yahoo chimed in with his sage advice "it will be at least 10% faster with a Bark Box" or something to that effect.
I noticed that the HP and power claims on the BB website had decreased after they submitted a sample for dyno testing. I got it in my head to try this " Super Power Bolt On Upgrade" myself so I ordered one and had it sent to Kev's GTG in Michigan. We never got around to testing it there, we were having too much fun. I finally tested it this last weekend, here are the results.

Redfin ported MS661 with Redfin 3 port muffler and standard muff cover on 20% Nitro - 15,879rpms WOT Stihl EDT-9, 122.9F Laser Thermometer muffler case after cuts, 131.7db digital SPL meter WOT 6" from muffler front - cuts 1.3s/1.21s/1.33s

ADD BARK BOX COVER to above - 14,579rpms, 138.2F, 130.9db, 1.26s/cutout/1.33s

No Muff cover on above - 14,818rpms, 134.8F, 131.7db, 1.33s/1.2s/1.2s

Redfin muff, standard muff cover on 87 Octane 10% ethanol 32:1 Bel Ray H1R - 14,571rpms, 278.1F, 130.9db, 1.56s/1.4s/1.3s

There are things I would change if I was to do this type of test again. Having a second person to do the temp test would be ideal, it is a lot of fumbling around to grab the temp as quickly as possible after the cuts.
I also have a standard new OEM MS661 muffler on the way for testing.
Apparently my tuning on the Methanol and Nitro in the vids is terrible, so that needs fixed.
I should also try the testing with a stock and standard ported/carbed MS661.
Any other suggestions welcomed.
Dave

If you posted it on Kevin Smith's
150 million member Chainsaw repair page
I'm the banned and couldn't see it.

 

[Dub11]

This sounds like Farmboss territory good sir.

 

[RI Chevy]

They must be U tubers. They're much smarter than us Forum guys...

 

[Czed]

 

[Woodpecker]

Banning yourself isnt in the survey? WTF! Clearly the only right answer as there wuz booth tew many variables and tew much gayness with the redfin661 and a barkbox.

 

[Czed]

I wonder if fabz invented the bark box?

 

[dall]

A second person would help the deviations in the variables.

so many variables
May need 5 people to watch and make sure they get the least amount of variables

 

[dall]

Banning yourself isnt in the survey? WTF! Clearly the only right answer as there wuz booth tew many variables and tew much gayness with the redfin661 and a barkbox.

I think one of the answers should be a variation of variables such as different pieces of wood
Different chain and sprocket
Different pressure on the saw

 

[cuinrearview]

For how obnoxious they look I was surprised that they're not much louder than stock. At least on a 500i. @Red97 did you already post your findings? Or are you allowed to?

 

[redline4]

I think one of the answers should be a variation of variables such as different pieces of wood
Different chain and sprocket
Different pressure on the saw

You forgot chain tension and newton meters of force placed on rear handle during high speed operation. Going to need at least 6 pressure sensors on said test saw. And wood.

 

[dall]

You forgot chain tension and newton meters of force placed on rear handle during high speed operation. Going to need at least 6 pressure sensors on said test saw. And wood.

good luck finding wood that doesnt have any variables in it

 

[redline4]

good luck finding wood that doesnt have any variables in it

I also read on here that one major variable not yet mentioned is how wide and long of a trench was the bar and chain used for prior to contact with wood?

 

[Red97]

For how obnoxious they look I was surprised that they're not much louder than stock. At least on a 500i. @Red97 did you already post your findings? Or are you allowed to?

I did once, I'd have to go find them again.
7% gain peak to peak. Iirc

 

[Definitive Dave]

A second person would help the deviations in the variables.

totally agree

 

[Czed]

How

totally agree

Much will CCC sell them for?

 

[Definitive Dave]

As much as we can of course

 

[Maintenance Chief]

Honestly I'd like to see it tested with a bone stock 661, because it would be the "new to saws" people who are in the market for stuff like this.
I do my own muffler modifications and honestly I don't see the magic in this ? But if you just started out and didn't know better well ? Kind of reminds me of the electric turbo air cleaner that used to be on EBay.