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Porting question.

675 views 5 replies 5 participants last post by  lms 
#1 ·
Hey guyz,I'm starting some port work on the throttle body transition casting this weekend.I have a bunch of rotary stones laying around,can I use those or should I use the sand paper kind?
 
#3 ·
Rotary stones will clog up in an instant with an aluminium casting, from there they'll rub and burr up.

You need a sacrificial type abrasive that is based on a rolled or laminated alum oxide grit bonded to cloth.

I've done lots of this...

Link 1

Link 2

Link 3 goes to a Vauxhall forum where you can see simialr throttle/inlet work.
 
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