manifold porting, which tool?

[cri_ag]

i have finished the construction of my turbo manifold and now need to clean up the insides of dags etc. its made of mild steel and i would like to know the best way to clean it all up. i have a die grinder and have tried the wheel that came with it, but it dident seem to have much effect. would a burr be more suitable? or will i just destroy the burr?

[Blade20034]

use a tool called a deburra than get some hannry paper and use that it might take a while but its worth it

[30psi 4agte]

use the burr to get rid of the major stuff then smooth it off with a flap wheel around 80 grit

[cri_ag]

so the burr will cut the mild steel ok?

[Earlyrolla]

Another name used for it is a rotary file.

Provided you get one that is designed for metal and not wood it should work OK.

Be prepared to pay for a decent one though, the cheaps ones will cause pain

They are available in short and long shank, the long shank are good for getting into manifolds.

An engineering supplier is probably the best place to go. Bunnings sell the cheaper ones.

[cri_ag]

yea i went down to the tool joint and they had decent quality burrs but i asked about one with a long shank and the dude went through the whole catalouge and came up with nothing, so i ended up with a short one. might have to ask around for a longer shank.

[o_man_ra23]

Yeah, a good quality burr will go through just about anything. Ive used mine on mild steel, for trimming up rust, cutting into cast iron, smoothing welds, you name it. Even done a little bit of alluminium, and apart from a couple of missing teeth, its good as gold. Fortunately this one was given to me by a mate who is a fitter/machinist, so its top quality, and didnt cost me a cent . But i will say that the good ones are worth the cash you fork over.

Cheers, Owen

[cri_ag]

i think mine was 40-50 is that a good one?

edit: just found the brand, garryson uk, decent?

[Earlyrolla]

Talking about not buying cheap stuff...

I bought a set of three long shank rotary files off eBay some time ago for about $150. Finally used them on Sunday. They worked on treat on aluminium and seemed fine on cast iron too (didn't stuff the cutting edges).

I believe around $50 to $80 should get you a good quality short shank rotary file. The long shank ones are more expensive.

[FATMR2]

Why dont you use a die grinder? Its the easiest way to clean out the bigger pieces of weld metal on the inside of your manifold.
I think mine cost around $80. The bits for them are a little expensive but it beats sitting there with a file or sandpaper.

Just a though....

EDIT: Just saw that you had one. I still think its the easiest way though.

[o_man_ra23]

FATMR2, the burrs and rotary files we are talking about are the bits that fit into the die grinder. Then you clean up with sandpaper cause the die grinder will give a rough as guts finish.

Cheers, Owen

[FATMR2]

I see.... My bad

[mrshin]

Buy yourself some decent earmuffs too so you don't go deaf... Airtools tend to do that to you!

[jeffro ra28]

for cast iron, the best to buy are the multi fluted jobbies, for alu tho the single fluted jobs have a better finish...

And BLADE20034, i think you are talking about emry paper, not hannry paper....lol

[cri_ag]

cool, thanks for the responses everyone.