Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[JamesV6CDX]

I need to go and get some tools for porting my V6 heads. Anyone got any ideas what/where? 

[zirk]

Standard Abrasives do a complete Head Porting kit and some good instruction samples.

Had a link somewhere to a PDF download, I'll try and dig it out.

Chris.

[Martin_1962]

A round file

wet & dry paper

All soft and easy - this is no cast iron head.

[NaughtyNigel]

I need to go and get some tools for porting my V6 heads. Anyone got any ideas what/where? 

Hi James,
Are you thinking of porting the old girl?

I used to use a 12 volt Dremel tool set (or similar), with abrasive cylinders and the like. These were ideal for porting two stroke racing engines, which had much smaller ports than the Omega.

Good luck with it! 

NN

[mrjimbo]

Tungsten carbide De-burring bits in a die grinder, quick and effortless but be careful not to get carried away   

Plenty on eBay or you can get them from any good tool supplier

[Martin_1962]

A file is enough - aluminium is soft

[feeutfo]

A file is enough - aluminium is soft

A file? Have you got electric out your way Martin? 24 ports with one file....? And about 3 weeks in the garage.

Also as a general point, is it not better to have the polishing or machining strokes at 90 degrees to the air flow direction?

[zirk]

A file is enough - aluminium is soft

A file? Have you got electric out your way Martin? 24 ports with one file....? And about 3 weeks in the garage.

Also as a general point, is it not better to have the polishing or machining strokes at 90 degrees to the air flow direction?

Ive heard this as well, think they call it The Ball Bearing effect of air stream over a slightly groved surface,  (something about creating a slight turbualance over the inner surface area to improve central air flow).

[Marks DTM Calib]

A file is enough - aluminium is soft

A file? Have you got electric out your way Martin? 24 ports with one file....? And about 3 weeks in the garage.

Also as a general point, is it not better to have the polishing or machining strokes at 90 degrees to the air flow direction?

The approach is to use a 'rough bastard' file to shape the port and then some emery to create the finish.

It does not take long. 

[JamesV6CDX]

considering I'm using 3.0 cams and 3.2 manifolds, will porting the head make a worthwhile difference?

[feeutfo]

A file is enough - aluminium is soft

A file? Have you got electric out your way Martin? 24 ports with one file....? And about 3 weeks in the garage.

Also as a general point, is it not better to have the polishing or machining strokes at 90 degrees to the air flow direction?

Ive heard this as well, think they call it The Ball Bearing effect of air stream over a slightly groved surface,  (something about creating a slight turbualance over the inner surface area to improve central air flow).

Exactly that, would imply i dremal type tool would be best for diy. If there is any truth in if of course.

Any port "polishing" i've seen has been done across the flow as opposed to with the flow. Porting/gas flowing or shaping of the ports them selves is, i beleive, something of a black art. Getting each inlet port to flow exactly the same and improve the basic design. When talking in general terms of course, i've no direct experience with it.

Specifically with the omega, re shaping, i guess we are simply talking about matching inlet mating surface faces to the plastic inlet(and inlet manifold?) and removing lips or edges along with a general clean up and polish as the inlet is not restrictive as such....?

I mentioned 24 ports earlier, but are we just talking inlet? Is there much to be done with exhaust ports?

[zirk]

considering I'm using 3.0 cams and 3.2 manifolds, will porting the head make a worthwhile difference?

I think it would, if youve got it all in bits anyway why not, MarkDTM showed me some pic's on another thread of mine of some work He did, I'll try and find the link.

Edit: some pic's here: http://www.omegaowners.com/forum/YaBB.pl?num=1255803076/0

[Kevin Wood]

considering I'm using 3.0 cams and 3.2 manifolds, will porting the head make a worthwhile difference?

It'll be worth making sure there are no steps in the intake tract from manifold to spacer to head, and remove any roughness from the intake ports.

I doubt there'll be much to be gained at the exhaust side, unless the gasket or manifold  is masking part of the port area on the head, which I'm sure it probably won't be.

Kevin

[Martin_1962]

It is worth it - the 2.5 exhaust manifolds are restrictive so worth changing too

[JamesV6CDX]

Have the later 3.2 ones, Martin