Another chainsaw dyno...

[Red97]

Not a bad little gain.

 

[RI Chevy]

Nice gains Joe.
I'm a little confused though. I thought I saw the graph that showed the stock 572 made about 7hp?
Let me go find it.

 

[RI Chevy]

Here.

 

[Duce]

Was his broken in yet. How many tanks run through it?

 

[Red97]

Nice gains Joe.
I'm a little confused though. I thought I saw the graph that showed the stock 572 made about 7hp?
Let me go find it.

Hard to say, another old system vs new.

Each engine is different from the factor. Maybe this one was a dud.

That is why the before and after on the same saw is critical.

Was his broken in yet. How many tanks run through it?

This one was well broken in, but not wore out yet. I would guess 30 ish tanks through.

 

[RI Chevy]

Interesting. 1 HP difference between DYNOs.
But I hear you. Before and after on same DYNO.

 

[Red97]

Interesting. 1 HP difference between DYNOs.
But I hear you. Before and after on same DYNO.

2 different saws too. None are ever exactly the same.

 

[RI Chevy]

True... 1HP is significant though in Small OPE.

 

[Nutball]

I've always wondered about that graph, and just never could quite believe it. 6ish HP is a lot more believable.

 

[Red97]

This was the run for last fall on this dyno system, with my new 572xp.

6.69 max
This was 6.2x at the peak

7% ish

 

[srcarr52]

This was the run for last fall on this dyno system, with my new 572xp.

6.69 max
This was 6.2x at the peak

7% ish
View attachment 291530

You have a factory dud, throw some ignition timing at it.

 

[Red97]

You have a factory dud, throw some ignition timing at it.

I gave that 6.2x 572 about .025" along with the porting. It did ok but nothing super crazy.

 

[RI Chevy]

May try and tweak the Autotune some???

 

[huskyboy]

You have a factory dud, throw some ignition timing at it.

Maybe he can ask you for your porting advice? Your saw made like almost 9hp or something crazy. Pretty good for 71cc engine.

 

[Red97]

Maybe he can ask you for your porting advice? Your saw made like almost 9hp or something crazy. Pretty good for 71cc engine.

Might have to do that.

 

[Redfin]

Maybe he can ask you for your porting advice? Your saw made like almost 9hp or something crazy. Pretty good for 71cc engine.

What fun is that?

 

[TreeLife]

What fun is that?

A nudge in the right direction never hurt anyone. Besides, it's been shown that Joe is a good cat and makes a great product. He isn't out to cut anyone's throat or anything.

 

[Redfin]

You dont need to explain. Joe builds a great saw.

 

[srcarr52]

Maybe he can ask you for your porting advice? Your saw made like almost 9hp or something crazy. Pretty good for 71cc engine.

That was with the old software so it would be interesting to see what it does with the new software, I'm sure it would be close.

Might have to do that.

Always happy to help.

 

[MustangMike]

The job of a saw porter is to improve upon the saw that he was given.

There will always be some that just seem to run better than others.

Each saw will have it's limitations.