john thornton
Hawkdriver (ret)
New member on this site, and have read lots of threads on porting. Why do some saws show big gains, and why do others not get the same glowing reports.
What saws respond best to porting and why?
- Thread starter john thornton
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Boleclimber
ArboristSite Guru
There is a lot to that question. I'll start simple. Every model of saw has a different design which can assist or limit modification capability.
HuskStihl
Chairin'em for the sound
The better the saws stock porting and compression and timing is, the less dramatic the gains will be.
A 385/390 is one of the biggest wow saws ive run after being ported, i didnt think much of them stock..ive heard guys say a ms241 wasnt a huge improvement after porting but i dont know mine is stock still , a 550 and 562 are two saws i could live with just the way they are !
HuskStihl
Chairin'em for the sound
That was a gross oversimplification. A saw must have the internals to handle more power...........oh never mind. Some do, some don't
A 660 and putting a old non decomp cylinder on with port work is a real big difference also.
john thornton
Hawkdriver (ret)
I understand what you said and that makes sense. I am new to chainsaws, but have several years experience with turbine engines. Since I retired I have discovered Dolmar saws and have brought several back to life after owner abuse. Removing cat mufflers makes a difference, but non cat muffler mods do not show much difference. Not many threads talk about WOW factor gains from this brand.
HuskStihl
Chairin'em for the sound
WTF is a Dolmar?
There's a few of them that have some wow factor. The 143,153, and 166 are torque monsters. The 7900 is a hot rod out of the box.
359's are very good with a little porting. Cheap and easy to work on.
sunfish
Fish Head
Yes... The 359 is the most impressive 'ported' saw I've ever run! Huge gains, over stock!
Welcome to the forum from another TN member.
Mastermind
Work Saw Specialist
I still think ported saws are dangerous, and just too damn loud.
Sometimes I agree about the too loud part for sure.
Mine doesn't have a decomp on it but I was very dissapointed with my 660 after I bought it. Ported now, I know I have all the saw ill ever need and it has the parts to last for a long time.
nmurph
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Yes, and though a 7900 is very strong stock, I've seen some of them turned into monsters with a little spit-polishing on the ports.
I've heard you use words describing ported saws such as a "fad"
Now you're just taking the piss.
CapitaineHaddoc
European Westcoaster
I have long thought that there was not much to gain on a 7900, as the saw is already excellent stock. But this one is really impressive,
He say the saw is tuned at 16.500 rpm, thas seems a little high for me, but this saw is damn strong
Dieselshawn
ArboristSite Operative
My 660 is quiet to me with my hearing aid and sounds just right.
I can hear the old homelites clearly without the hearing aid and they have little to no mufflers.
