Another chainsaw dyno...

[Miller Mod Saws]

You know how she runs. Have fun with it

Absolutely I do. This dyno is pretty awesome. I’m a little jealous I don’t have one. Lol. That said. Just like most guys on here. When your at a gtg. You can hear the saws that are happy. And when you run one you know instantly. First time I ran this hybrid. I knew. Lol. Believe I tried to steal it that day didn’t I. Lol.

 

[Red97]

Deets hybrid 044/46 vs flying tiger 660

 

[jacob j.]

That's a nice torque curve on Deets' hybrid.

 

[Bigmac]

That's a nice torque curve on Deets' hybrid.

Ya that’s pretty flat!

 

[Bigmac]

On the graph it looks like it peaks it 9700-ish

 

[MustangMike]

Neither saw looks peaky, DEET's saw just has much more of it and takes it into the Stratosphere!

8 Hp from 7,500 to 10,250 is not a bad power band!

The power to weight of DEET's saw is insane!

 

[BonScott46]

@Deets066 pretty close to peak torque at peak hp and basically flat between 8-10000. WOW.

 

[Bigmac]

Neither saw looks peaky, DEET's saw just has much more of it and takes it into the Stratosphere!

8 Hp from 7,500 to 10,250 is not a bad power band!

The power to weight of DEET's saw is insane!

That’s true, deets makes 8 hp from 8k-14k

high rpm torque make lots of hp! At 10.5k 1 lb of torque makes 2 hp so making torque gains above 10k will yield great hp, 10.5 k is a good cutting rpm as well, so marking torque in that rpm is a good target. It’s pretty eye opening when you see it in graph form. It’s been fun to see in a graph what makes for a nasty saw! It has really changed my thinking, not that, that really matters, but it still cool! If a saw won’t rpm over 10k an maintain torque there it won’t look great on the dyno

 

[Deets066]

Didn’t there used to be a saying that hybrids were peaky?

 

[Deets066]

I think you’d want max torque closest to desired cutting rpm. I’d love to see peak torque at 10,000 rpm, but I don’t think that’s achievable.

Guess it is achievable lol

 

[Fruecrue]

Didn’t there used to be a saying that hybrids were peaky?

Yup, it appears the peak is like a rolling horizon between 6 and 13,000 RPM.

 

[markds2]

Didn’t there used to be a saying that hybrids were peaky?

Love to know the recipe Deets

 

[Deets066]

Love to know the recipe Deets

There is no recipe, had a good cylinder so I just did what little it needed.

 

[markds2]

There is no recipe, had a good cylinder so I just did what little it needed.

So no machine work? Only grinding?

 

[Deets066]

So no machine work? Only grinding?

Took .022 off the base
Widened the exhaust
Widened intake and lowered to 80

101.5 - 122 - 80

 

[markds2]

Took .022 off the base
Widened the exhaust
Widened intake and lowered to 80

And you didn't use a China cylinder?

 

[markds2]

Took .022 off the base
Widened the exhaust
Widened intake and lowered to 80

101.5 - 122 - 80

And...if I remember rightly, you didn't just grind the lip off the lowers, you filled and smoothed them with epoxy....to ensure you didn't loose velocity, is that correct?

 

[Deets066]

And...if I remember rightly, you didn't just grind the lip off the lowers, you filled and smoothed them with epoxy....to ensure you didn't loose velocity, is that correct?

Correct

 

[Red97]

Mofo 036 with metal mesh filter, and without. Both same 15k tune

 

[XP_Slinger]

View attachment 247051
Mofo 036 with metal mesh filter, and without. Both same 15k tune

Look at that torque curve! Or rather how flat it is! Badass @drf256