Dyno tested...... Mastermind Ported 660 vs Stock 660 vs Dual port 660

[Ron660]

Here's the percent increases of the ported 660 compared to the stock 660:
RPM's % >
8500 = 35.4%
9000 = 37.5%
10000 = 59.7%
11000 = 73.7%
12000 = 180%

The average percent increase in the ported 660 from these five rpm ranges (8500 - 12000) was 77.2%!
The average percent increase in the ported 660 from the first four rpm ranges (8500 - 11000) was 51.5%!
Randy, I definitely got more than my money's worth. I feel like I need to send you more money!

 

[stihlaficionado]

The manufactures are also likely quoting crank, not chain HP. Nice work to both Randy and Chad

How much is lost? 1-2 hp?

 

[KG441c]

The average percent increase in the ported 660 from these five rpm ranges (8500 - 12000) was 77.2%!
The average percent increase in the ported 660 from the first four rpm ranges (8500 - 11000) was 51.5%!
Randy, I definitely got more than my money's worth. I feel like I need to send you more money!

No doubt! He did an awesome job. Its kinda like he said about my 362c from the factory it was a turd!! Lol! That factory 660 was a huge turd!! He made u a good one to be proud of though

 

[Mastermind]

So the older 066 or 064's produced good hp?

Yes sir. The 066 Red Light was probably the strongest of all the 1122 series saws.

One of my 066s did beat a stock Red Light by 14 seconds in a single cut though. So they ain't crazy stout.

The average percent increase in the ported 660 from these five rpm ranges (8500 - 12000) was 77.2%!
The average percent increase in the ported 660 from the first four rpm ranges (8500 - 11000) was 51.5%!
Randy, I definitely got more than my money's worth. I feel like I need to send you more money!

Well if you insist.

 

[fastLeo151]

Yes sir. The 066 Red Light was probably the strongest of all the 1122 series saws.

One of my 066s did beat a stock Red Light by 14 seconds in a single cut though. So they ain't crazy stout.



Well if you insist.

To me the real question is what does a old school 066 ks jug ported do on the dyno...

 

[Mastermind]

It will likely make a little more power Andrew. The exhaust is lower......

 

[KG441c]

What does the factory porting look like on the 661 Randy. Did they correct the exhaust height and leave less on the table?

 

[Mastermind]

They did get the exhaust at a better point......and they did leave less on the table. But the gains are still very impressive.

 

[stihlaficionado]

They did get the exhaust at a better point......and they did leave less on the table. But the gains are still very impressive.

So you have the 661 in your area?

 

[KG441c]

Ill be the first in line when I see the dyno if it has gains like Ronnies! I bet its a smooth cranking, idling, and accelerating saw

 

[stihlaficionado]

Ill be the first in line when I see the dyno if it has gains like Ronnies! I bet its a smooth cranking, idling, and accelerating saw

It had better be for $1300+

 

[cgraham1]

660

I'd like to see something like this getting tested... 797 Gear drive!

 

[stihlaficionado]

660

I'd like to see something like this getting tested... 797 Gear drive!
View attachment 366080

So does it vibrate the fillings out of your teeth?

 

[cgraham1]

So does it vibrate the fillings out of your teeth?

It's not mine.

 

[stihlaficionado]

Looks like top notch condition

 

[wyk]

660

I'd like to see something like this getting tested... 797 Gear drive!
View attachment 366080

Honestly, I would be more impressed if the dyno could hold that thing back enough to even get any meaningful results.

 

[mdavlee]

I had heard way back stihl went by crank hp and husky went through the clutch. This was in 2003-2004 time frame. I don't know how true that is. We need to see a husky dyno on there now.

 

[KG441c]

I had heard way back stihl went by crank hp and husky went through the clutch. This was in 2003-2004 time frame. I don't know how true that is. We need to see a husky dyno on there now.

What would be ur prediction on hp for a 395 Mike?

 

[showrguy]

i like this thread !!

 

[mdavlee]

What would be ur prediction on hp for a 395 Mike?

Stock probably 6.5-7. Ported I would say 8.5-9.