Another chainsaw dyno...

[huskihl]

I'll throw it on the mill.

Cheater cheater

 

[huskihl]

 

[Red97]

Cheater cheater

It worked...

Now to see if it runs in the morning.

 

[Red97]

 

[MustangMike]

Very nice gains and also very interesting ... I have questions!!!

So, that is a "double big bore"??? (AKA 460 Big Bore)?

I presume it is an AM jug???

Make???

Also very interesting that peak horse is about 1,000 RPMs less, must be a torque monster!

I wonder if it is the carb or transfers that are limiting RPMs.

I'd be interested in knowing any details! (Bridge ports, etc).

Thanks!

 

[Red97]

Very nice gains and also very interesting ... I have questions!!!

So, that is a "double big bore"??? (AKA 460 Big Bore)?

I presume it is an AM jug???

Make???

Also very interesting that peak horse is about 1,000 RPMs less, must be a torque monster!

I wonder if it is the carb or transfers that are limiting RPMs.

I'd be interested in knowing any details! (Bridge ports, etc).

Thanks!

Bare minimum, just the general 100,120,82

Little bit of widening.

Farmertec 460bb

The stock 044 prolly had a bit more duration.

It would prolly make a bunch of power with a higher exhaust.

Still turns 13.5k+ easy enough.

 

[Red97]

I have questions too Joe. What or who is HMWF LLC?

My saw/dyno business name.

 

[Terry Syd]

Very impressive gains on that graph. What is the stock displacement and the 460BB displacement to get an idea about the % increase in displacement.

No replacement for displacement is an old guideline, but still rings true.

 

[Red97]

Very impressive gains on that graph. What is the stock displacement and the 460BB displacement to get an idea about the % increase in displacement.

No replacement for displacement is an old guideline, but still rings true.

About 11cc gain

71-82

 

[Terry Syd]

So a 15.5% gain in displacement, but the gains in power far exceed that.

It just shows that a % here and a % there adds up, in fact it is more than cumulative. If you add 15%, then mod that to give another 5% you are also adding 5% to the extra 15%. Keep it going, 3%, 2%, etc. and pretty soon you are looking at a dyno graph like that.

 

[MustangMike]

I often notice an increase in vibrations when I put heavier pistons in those saws.

How is yours?

 

[Red97]

I often notice an increase in vibrations when I put heavier pistons in those saws.

How is yours?

Not sure, I didn't really hold it.

Fired it up, and bolted it right to the dyno.

Felt about right while holding it for that short time.

 

[Woodpecker]

I have questions too Joe. What or who is HMWF LLC?

Stands for Hoe Moe Wif Friends

 

[p61 western]

Stands for Hoe Moe Wif Friends

So it's legit huh?

 

[Woodpecker]

So it's legit huh?

Moe builds a great saw!

 

[TreeLife]

Bare minimum, just the general 100,120,82

Little bit of widening.

Farmertec 460bb

The stock 044 prolly had a bit more duration.

It would prolly make a bunch of power with a higher exhaust.

Still turns 13.5k+ easy enough.

Extensive grinding for part 2?

 

[Red97]

Extensive grinding for part 2?

It is getting sent as is. Just wanted a stout work saw.

 

[MustangMike]

It sure looks like it will be all of that, a torque monster that you can lean on!

Did you use the supplied piston and rings, or upgrade anything?

 

[Red97]

It sure looks like it will be all of that, a torque monster that you can lean on!

Did you use the supplied piston and rings, or upgrade anything?

54mm wiseco 272 piston/1mm ring

 

[MustangMike]

OK, nice, I didn't connect the dots ... that is the piston you windowed?