Part Six: The Exhaust System

[Mastermind]

I'm spraying 2-4-D again....

 

[mdavlee]

I've never lost power with a front opening.

 

[mdavlee]

These idle fine.

 

[RIDE-RED 350r]

^^^Holy crap on pic #1!!^^^

 

[mdavlee]

It works. I did make another muffler with a more centered over the exhaust port

 

[huskyboy]

These idle fine.

Do huskies like more opening than stihl? My 385 you did has your single 1" pipe

 

[mdavlee]

Do huskies like more opening than stihl? My 385 you did has your single 1" pipe

I put about the same in both.

 

[mdavlee]

Found it. One on the far right.

 

[Al Smith]

E Copsey had I think a Stihl at the races in Chardon that had a hole 1" wide and nearly the length of the cover .So I thought what the H and tried it on my souped 038 Mag .First I had to richen the idle screw but it did over run the stock Bing carb .Didn't work for me .
Didn't hurt the saw,fact I used it today .The cut up cover is someplace in my garage amongst the other assorted junk .

 

[Deets066]

In a race saw application, one large opening in the front cover seems to be the fastest.

For a work saw in big wood I'll take a dual port, one on each side with a solid front cover. Or a tri-port.

I've never cared for the tone or performance of an outlet on the side and one on the cover in a dual port

 

[mdavlee]

I don't mind the homemade dual port with a deflector.

 

[TreeLife]

I want one done for my 7910 that looks like bull horns

 

[huskyboy]

I don't mind the homemade dual port with a deflector.

deflector probably help vs just a hole in cover aimed to the side on oem.

 

[mdavlee]

I want one done for my 7910 that looks like bull horns

Like the dual 1" on the husky?

 

[mdavlee]

deflector probably help vs just a hole in cover aimed to the side on oem.

It does a lot

 

[Deets066]

I don't mind the homemade dual port with a deflector.

That ain't too bad, guess I just don't like the oem ported front covers

 

[mdavlee]

That ain't too bad, guess I just don't like the oem ported front covers

Me either

 

[Al Smith]

Brian W Aka "timber wolf" had a spread sheet on hole sizes with stock carbs .He showed graphically that anything above about 125 percent was detrimental .Fact anything above 80-85 percent didn't show much gain ."Zander" down Cinci way cooked an 880 by carving out too big of a hole and not retuning .tried to sell the saw on flea bay for next to nothing .I tried to tell him but -----well chit happens

 

[Manofstihl066]

I'm spraying 2-4-D again....

Killin weeds?

 

[Deets066]

"Zander" down Cinci way cooked an 880 by carving out too big of a hole and not retuning

Ok, let's talk about this. If he carved a BIG hole and smoked the saw. It must have run leaner, which in my eyes is burning more efficiently and completely. Should make more power...being it would get tuned properly