Another chainsaw dyno...

[cuinrearview]

How does it compare to a 501p?

 

[huskyboy]

That's impressive porting results Joe. Almost a hp more with 10 less cc compared to a 361. Oh boy, the Echo debate deepens.

Yup, and then port the 361 and blow away the little echo..... then port the 7310 and blow away the 361. Never ends does it? Lol

 

[RI Chevy]

Very important that we compare apples to apples.

 

[Red97]

How does it compare to a 501p?

Same p/c

 

[whitesnake]

Wow 4910 put down some good numbers! Lightweight nimble saw too.

 

[whitesnake]

Has there been a 800p on the dyno yet? I know they don't have a big following due to their power to weight ratio. Just curious what they look like on the dyno. Plus I have a minty one sitting here that needs a topend and a have a brand new topend sitting here waiting to be put on lol.

 

[cuinrearview]

Same p/c

I see. So same saw with a plastic handle? What's the difference in the coil? Cuz I've ran a 490 and a 501 it's not. $300 at the dealer days for a 4910 is tempting if all you're giving up is the handle material.

 

[Red97]

I see. So same saw with a plastic handle? What's the difference in the coil? Cuz I've ran a 490 and a 501 it's not. $300 at the dealer days for a 4910 is tempting if all you're giving up is the handle material.

490 is different p/c and coil vs 4910

 

[Red97]

Stock vs ported cs 8000

 

[MustangMike]

I'd say it improved a little!!!

 

[NightRogue]

I'd say it improved a little!!!

A little?! Give him a break!
I think it improved abit
LOL

Sent from my INE-LX2r using Tapatalk

 

[whitesnake]

Big gains on the 8000 too! She was pretty pathetic stock lol. Doesn't the 800 have a better cylinder than the 8000? Capable of more power?

 

[Red97]

Big gains on the 8000 too! She was pretty pathetic stock lol. Doesn't the 800 have a better cylinder than the 8000? Capable of more power?

This was a late model 8000. Same jug as the 800s

 

[MustangMike]

You did a great job improving it ... but I see why the other brands charge more for their saws!!!

 

[huskyboy]

You did a great job improving it ... but I see why the other brands charge more for their saws!!!

I guess you get what you pay for with a stihl or husqvarna?

 

[Red97]

395 xpg.

 

[huskyboy]

395 xpg.View attachment 293380 View attachment 293381

Nice, you boring the carb out yet?

 

[Red97]

Nice, you boring the carb out yet?

No, just normal cylinder porting and muffler mods

 

[huskyboy]

No, just normal cylinder porting and muffler mods

The next time you got a wj115 or 300 tilly from a 395 and wj67/wj69 from a 660 on the bench measure the venturis.... a significant difference. 19.05 vs 17.6mm. The butterfly is also smaller. The wj39 394 carb is larger than the 395 carb as well at 18.45mm. I have had good luck with opening the venturi 1mm on the 395 and thinning the shafts. The needle seat hole is also smaller on the 395 carb vs the 660 carb. Jetting is similar though. I guess it depends on the porting one does for how much carb mods will affect gain? Mine responded well.

 

[RI Chevy]

It would be interesting to see if and how much a modded carb changes the DYNO results.
How the torque and HP curves are affected...
Just thinking outloud.