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Discussion Starter · #1 ·
Hey I'm doing the throttle body swap on my 2g and the carbide bits I have are not working for the aluminum (porting the intake inlet). I purchased them at a tool shop when I ported my exhaust mani and turbo and they worked fine but they suck on aluminum. I am not getting anywhere. Any suggestions on another type of grinder bit to use for this? Thanks.
 

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You can use stone or paper roll discs. You can still use your steel bits on aluminum though. I'm assuming you aren't getting anywhere because the bit is clogging. If that's the case, then get a tube of grinders grease (think that's what it's called). It'll help keep the aluminum from sticking to the big, and clogging it up. There are also carbide bits made for aluminum that have much larger teeth to avoid clogging.
 

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Your bit(s) are probably dull if your using the same one you used on your turbo and exhaust mani. Try a new one, the carbide I have cut aluminum like butter and its pretty small.
 

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Discussion Starter · #7 ·
Damn.. none of the industrial tool dealers around here stock a bit for grinding aluminum. I'm going to try some sand stone ones, but looks like I'll end up having to order one online. According to RRE's write up you can just use a dremel, but I think that would take even longer. Thanks for the threads.
 

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Don't mess with the runners... I port the crap out of exhaust components but wont' there to mess with the intake MANI. You can mess up the flow if you don't get it right, Liquids flow better in "ruff" surfaces and if you don't port the head to match it is pointless...
 
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