coozer
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| posted on 24/9/06 at 03:18 PM |
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Porting, Grinding?
What should I be using to clean up the manifold I've just made to match ZZR11 carbs to my zetec.
A die grinder comes to mind but I dont have one, will a dremel do, or a stone in the drill??
What are all you budding port matchers using??
Steve
1972 V8 Jago
1980 Z750
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omega 24 v6
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| posted on 24/9/06 at 03:50 PM |
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You get rotary burrs to fit in the chuck of a drill. They're not designed for a mirror finish mind (not that you want one) but they do remove
material quite quickly.
rotary burr linky
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Peteff
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| posted on 24/9/06 at 04:14 PM |
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If you can, get a flexible extension shaft to fit in the drill chuck and a burr or stone in the other end, easier to control and see what you are
doing.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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roadboy
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| posted on 24/9/06 at 04:48 PM |
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To do the job properly you need a die grinder & burrs as a drill, even with flexi drive does a poor job due to the low speed. Finish off with
sanding wheels of different diameters, for a good finish.
HTH
Ian
[Edited on 24/9/06 by roadboy]
Jude Performance Services
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big_wasa
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| posted on 24/9/06 at 07:43 PM |
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I bought a good quality bur then finished up with the dremel.
did mine this morning.
zetec engine to xr2 manifold to capri 3l carb 
 
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big_wasa
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| posted on 24/9/06 at 07:44 PM |
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pic 2
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Catpuss
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| posted on 24/9/06 at 08:42 PM |
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One thing to add, read from many articles on porting. Is polish and work up to a nice shiney finish then blast is to take the shine away to get a nice
dull finish. This is because on a nice shiney surface the fuel vapour can condense out of the air mix. The rough surface creates a slight turbulance
which helps prevent this.
Polishing the exhaust ports is fine though as you want a nice quick exit.
The turbulance created also restructs the air flow, though slightly, where this is more prevaliant (at least in bikes) is where people use that sort
of ribbed Hover hoze to feed in a ram air. I remember in Performance Bikes this piping can restruct by a quater just becuase of the ribs causing
turbulance.
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