How much compression does a MMWS have???

Randy does build some good comp into the saws he does...

I read on the interwebs that Stihl plastic was "less plasticy" than other brands? Seriously!

 

Keep prying, Don . For what it's worth, comparing my Jred to the Stihls, the Stihl saws do have thicker, more rigid covers.

 

OK, OK, I'll stop now...

 

Another Hybrid customer with a smile !!
I love me a Hybrid !!

 

Just tested today... both around 180 psi. I thought they would have more. Like I said before, the 288xp I got from Neal Murphy has 183 on the same gauge and it's a real pain in the butt to pull over.
Dolmar 7900...

 

Here's my 260 done by Randy a couple years ago. What's your elevation, Clint?

 

1850... And here's a bone stock 026...

 

Clint I had 3 of those gauges not read correctly before I give up and bought a snap on off ebay.

 

It is kinda funny how they all say 180

 

Ha, , I didnt even notice that.

 

They're not all 180. I do have a SnapOn tester somewhere. I guess I'll have to dig it out.

044 w/ new Meteor piston...
288xp w/ base gasket delete...
Moody ported MS261...
Moody ported 2172...

 

My fastest saws have less than 200psi... All in the 170 - 190 range... The smaller saws seem to handle higher comp better than the bigs..
Though I have seen some @ 210+ that really hauled the mail..

 

I built a small saw recently that had an unexpected comp reading. I used an 026 cylinder and Meteor piston in an 024 Super case. After almost 3 tanks of fuel, it is showing 185 psi already.

Do you mean they run better with higher comp, or the lower end can take a better beating?

 

A. I think the smaller saws' lower ends can take a bit more comp. Also, the higher comp "small" saws I've run seem "Stronger" as in more low end push...
B. Above being said, the fastest saws are not working at lower rpm's. In a race, chain speed is king... And there are no corners to come out of in a chainsaw race, it's all straight forward full throttle...
In developing high rpm power, port timing is more important than sheer compression, but for a work saw, the higher compression may give you the feel you're looking for. The "I stop for nothing" feeling...

Then, of course, there are some exceptions to the rule... As always..

 

For simple minds like mine, they can cause you to think yourself in a complete circle and end up back where you started...

 

You can hardly notice the damage.

 

That's an ouchie.....

 

Hey fellows...I forget this place exist. Maybe ya'll liked it that way!!

Clint- NDBGD 288's are nasty. I have one in the shop I just finished and am waiting on my test log to get from under the water (well, just where you stand, it's up on logs). I dread starting it. I'm no shrinking pansy, but I use the decomp every time on every saw that has one (OK, I skip it on the 401!). I've had 3 shoulder surgeries and one elbow surgery. They aren't fun and I do everything I can to avoid having problems in them (only the elbow was caused by saws...the others were sports related).

Just remember, Dr.'s love hero's- it keeps them in boats and planes.