Magnet

iTrader: (36)

I'm just wondering what bits you guys use for porting your throttle bodies?

CTSmechanic

iTrader: (2)

I woult think you may want to use a abrasive roll or something along those lines.. Not really sure about a carbide cutter on diecast or a nice pretty billet piece it may take longer buts easer to fix if you get in trouble esp if its your first time

Camaroholic

iTrader: (1)

Sanding roll kit from Standard Abrasives (or the no-name Summit or Jegs abrasives kit) will work just fine. Dip the sanding roll in a little transmission fluid to provide some lubrication and grind away. It'll do a nice job.

I've also purchased cutting bits from Summit, they clear away material really quickly. They work well on aluminum, but steel can be a bit dangerous with cuttings (aka splinters).

CTSmechanic

iTrader: (2)

Theres a few websites that sell carbide cutters for super cheap or ebay.... I'd reccomend some cutting wax esp for alum....

Magnet

iTrader: (36)

I have ported a few throttle bodies with a dremel and sanding rolls, but it takes forever, and so i bought a die grinder...

Magnet

iTrader: (36)

so what bits are necessary? a carbide cutting bit and then like a sanding bit? I don't know if i want to buy the whole kit from jegs/summit...

CTSmechanic

iTrader: (2)

Is it a stock TB? I'd stick with an abrasive roll on a 1/4 inch mandrel The dremmel takes forever because it has no *****... what grit rolls did you use?

Magnet

iTrader: (36)

yes its a stock TB..i think i used like a 120 grit roll for the dremel, but yes i know it has no *****..thats what the die grinder is for!

By abrasive roll you mean like the kit from jegs/summit or can i buy just that somewhere??

Camaroholic

iTrader: (1)

I highly recommend the whole sanding roll abrasives kit. You'll use it for more than just the TB, I promise. I think it's under $40... There are tons of things you will use it for, and it basically lasts for years. It's a good investment. I'm still on my first kit, and have used it a lot.

stevied916

iTrader: (30)

I used a carbide bit and finished with grinding stones

FiredUpZ28

Carbide and steel burrs are great. If your using stones make sure you soak them in oil or kerosene, they get clogged fast - especially if your grinding on aluminum.

For a finish I'll be making my own sanding rolls. For finishing them off, anything in the intake up to the fuel injectors should be as close to a mirror finish as possible.

chvypwr31

iTrader: (4)

a helical carbide cutter would work great just be careful they take of a lot in no time especially cast metal and then go back and finish with a sand paper roll and then some good old fashioned hand sanding to smooth out the surface theres many ways to do it thats just my way.

CTSmechanic

iTrader: (2)

I have never used A stone bit on Alum they clog up and leave a poor finish.. Shop I work at you'll get fired for trying to use a Stone bit/wheel on alum...

Grimes

iTrader: (3)

had good luck with 120 sanding rolls....