Port matching

[sambo]

So, whats this all about then? You match the inlet manifold ports to the gasket dont you? Whats the best tool to use to remove the alloy?

 

Cheers.

[hotrodholty]

So, whats this all about then? You match the inlet manifold ports to the gasket dont you? Whats the best tool to use to remove the alloy?

 

Cheers.

im glad someones brought this up. iv got a ported head on my x/flow but unported manifolds. what should i do? will this cause me any problems as it is or does it just make having the ported head pointless as im restricting the fuel/air flow from the start?

[Vista]

The point of port matching is to promote laminar flow into the head from the inlet manifold. It's worth doing but I couldn't advise on what tool to use.

[hotrodholty]

i bought some of those pink stones that go into a drill as i was told they would do the job, but they are very slow and rough. i think maybe the drill bits that are like wound sand paper might work better?

[DEP]

I had my inlet manifold match ported on FOE by Steve at Vulcan

Deffo makes a difference

[MK2Ed]

Mine was crap before I had it done, sections in the way and everything

 

Ultimately you are after a resistance free passage as possible into the head...

[mk2 matt]

To do it properly you have to put two dowls in the head to locate the manifold to stop it moving on the bolts

The idea is to open the ports on the manifold to the same size as the head to improve air flow but if you open it up too far you will create a step which will cause turbelance which is no good hence the dowls to locate it spot on

As to what tool to use, the best way is to use an air grinder. the grinding stones are crap (last 5 mins and take forever)

Go to a good tool shop and get a drill bit with a sort of file on it (make shure its for metal not wood) costs about 20 pound eats metal lasts for ever