What saws respond best to porting and why?

[john thornton]

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.

 

[Boleclimber]

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]

The better the saws stock porting and compression and timing is, the less dramatic the gains will be.

 

[SAWMIKAZE]

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]

The better the saws stock porting and compression and timing is, the less dramatic the gains will be.

That was a gross oversimplification. A saw must have the internals to handle more power...........oh never mind. Some do, some don't

 

[mesupra]

346xp is a totally different saw ported.

 

[mdavlee]

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 !

A 660 and putting a old non decomp cylinder on with port work is a real big difference also.

 

[john thornton]

The better the saws stock porting and compression and timing is, the less dramatic the gains will be.

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]

WTF is a Dolmar?

 

[mdavlee]

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.

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.

 

[ELECT6845]

359's are very good with a little porting. Cheap and easy to work on.

 

[sunfish]

359's are very good with a little porting. Cheap and easy to work on.

Yes... The 359 is the most impressive 'ported' saw I've ever run! Huge gains, over stock!

 

[rburg]

Welcome to the forum from another TN member.

 

[Mastermind]

I still think ported saws are dangerous, and just too damn loud.

 

[mdavlee]

I still think ported saws are dangerous, and just too damn loud.

Sometimes I agree about the too loud part for sure.

 

[redfin]

A 660 and putting a old non decomp cylinder on with port work is a real big difference also.

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]

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.

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.

 

[Flatie]

I still think ported saws are dangerous, and just too damn loud.

I've heard you use words describing ported saws such as a "fad"
Now you're just taking the piss.

 

[CapitaineHaddoc]

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 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]

I still think ported saws are dangerous, and just too damn loud.

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.