polishing 044 intake and exhaust ports on cylinders

[325ed]

what do i need for tools i just want to do a mild polish

 

[CapitaineHaddoc]

I think a Dremel is what you need!

 

[WHSH]

No intake polish, 150 grit sand paper finish. No transfer polish, again 150 grit intake finish. Polish the exhaust, go up to 600 grit wet sand. What is most important is smoothing flow.

 

[Ozhoo]

Dynotech tested this theory over a decade ago and found that while polishing the intake track increased airflow, it decreased HP due to decreased fuel/air mixing.

 

[WHSH]

Yep, that is the what the sum of what I have read with mx bikes and saws.

 

[325ed]

i really want to cut the ridge off on bottom of intake and exhaust what dremel bit do i you

 

[pioneerguy600]

Dremel 9903,

 

[blsnelling]

Don't touch the bottom of the exhaust. It sounds like you really need to study up on what you're doing. There are many good threads in the FAQ thread found in the Sticky section.

 

[WHSH]

That burr cuts well but slowly, wich may be what you need to start. Double cut or alloy cut from buckeye carbide does the trick. I am with Brad on the bottom of ex port. Take a look to how far the piston comes down, it generally never opens the full exhaust window stock.

 

[325ed]

Dremel 9903,

 

[325ed]

thanks i have never done this could u give me some tips thanks

 

[anlrolfe]

Dynotech tested this theory over a decade ago and found that while polishing the intake track increased airflow, it decreased HP due to decreased fuel/air mixing.

From the "shade tree mechanic" days of my youth, I kind of remember intake manifolds that would purposefully have ripples and ridges inside the manifold. Usually this would be directly below the carb. When the 4-barrel opened up dropping a thick mix the intent was to introduce minor turbulence along the bottom to churn the air/fuel blend them more efficiently. Some experimented with dimples and grooves along the bottom of the flow path. With a tool like a chainsaw the "bottom" is always changing direction. Delicate balance between max flow, HP and engine efficiency.

 

[blsnelling]

--er, uh?

Just kidding blsnelling.

Ooops, lol

 

[blsnelling]

thanks i have never done this could u give me some tips thanks

My best recommendation is that you read, read, read. http://www.arboristsite.com/community/threads/chainsaw-faq.148248/

 

[moody]

My best recommendation is that you read, read, read. http://www.arboristsite.com/community/threads/chainsaw-faq.148248/

Reading is his friend. I'd also recommend that he starts with a toasted cylinder in case of a hiccups no money is lost

 

[50blues]

to polish, I wrap some sandpaper round a piece of rod, chuck it into the drill and go to town. You can actually remove a lot of material with it so go slow.