modifed saws

[lucky]

Has anybody ever measured the improvement in horsepower on a modified saw? I do not doubt that porting adds a great deal of power, I'm just curious about the actual numbers. For example how much hp can be gained from porting an 346,372, 044 or 046? Thanks John

 

[lucky]

yes but,

Walkers graphs use "time in seconds on the Y axis. Huh?
shouldn't it be RPMs? Most charts have hp and torque on the x axis with RPMs on the Y axis. Anybody else notice that the stock hp and torque are much lower than factory ratings? What the heck? Not at all knocking on Walker's, I'm just confused.

Anybody else take measurements with a dyno? Are husky and stihl actually overstating power?

 

[Gypo Logger]

Hi Lucky, Ed heard built me a 346 for alcohol, it now outcuts Ed's stock 066.
John

 

[lucky]

All I can say is wow! That is impressive Are you sure the chain wasn't on bass akwards on that 066?

Lucky

 

[ehp]

Lucky you have tothink if you want a race saw or a saw to cut wood with
A full race saw will have more horse power than most people can think of but they will only make a couple cuts then they are hot so you have to let them cool down plus refuel them , they really like alcohol/nitro by the gallon
these saws are great for racing but no good for anything else unless you just want to show your friends
now on wood saws that are ported yes you do see a gain in power but at a higher rpm so you must use that power at that rpm because if you have a stocksaw that is to run at 9300 rpm in the wood and you port it you will need to be up to 10500 to 11000 rpm . it depends on how much you port it, now if you go over that rpm by much on porting , i feel you will lose so much torque that sure you will have more power at that rpm but if you go up or down a couple hundred you will have alot less so it makes your saw very peaky on power and not much good for a work saw plus what you have to watch out for the most is heat
if you psi is to high to try to give you torque or your rpm is to high you will get to hot for a worksaw an on most accounts after 10 cuts the stocksaw will out cut your ported saw

 

[lucky]

Thanks for the reply Ed. Interesting. If I understand right, a ported saw makes more top end power and less midrange torque? Is that what you meant by peaky? I don't race or anything important like that so I guess I just need my saw to be a "work type saw". What can a guy warm up his work saw to give it more torque without getting to wild? I hear everybody here makes holes in the muffler. Thanks, Lucky

 

[Marky Mark]

Visit walkers sawshop and do a trade up for one of there mufflers. They do a nice clean job and the price is right. That mod is about 99% of us need.

 

[ehp]

yes the muffler is the first spot to go and to be honest the most gain you will see is in the muffler
but it not as easy as cutting a bunch of holes in your muffler there is a amount that you can take out and donot go over that , your motor needs some backpressure to live
and about midrange torque , when you are cutting most of the time you have your throttle wide open so you never use your midrange anyhow. if you chain your saw with the right type and gear plus file it good you would be beside yourself on how fast they will cut

 

[RupeGoldburg]

Just put a drill in there and move it around trying to remove most of the guts. I did it to some of my chainsaws and it works. It's good for Government work

 

[ehp]

like i said if you want to make noise but you have to be carefully before you take out to much and now you are making alot of noise but cutting slower because of no backpressure

 

[ehp]

I will be picking upa 357 this weekend so i will let you know on how it goes. it is going to be a woodsaw not a race saw for now anyhow
but i think i would like to build a 357 nitro saw after seeing how much power the 346 has it should be real fast