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Location:
Hornsby, N.S.W
Registered:
September 2002
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 2tgeu head porting and polishing
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Sat, 12 April 2003 23:35
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heya guys im looking for somewhere to get my 2tg head polished and ported, i would like to find somewhere in sydney that will do a good job for a good price, how long does the process cost and what sort of money am i looking at for this type of work.
thanks
justin
0413461518
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Location:
MACKAY
Registered:
May 2002
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 2tgeu head porting and polishing
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Sun, 13 April 2003 13:22
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a couple of ideas for ya,
i did my 3K head myself, things like cleaning up casting marks, rounding sharp corners in combustion chamber, unshrouding the valve heads, tapered valve guides, increased bias for swirl, opened walls and roof of exhaust port.....
all relatively easy with a power drill and some die grinder bits. also used some 3M brand pad things that are designed for removign corrosion on aircraft aluminium parts...
anyhoo, i try to size my intake ports to get about 300ft/sec air velocity at peak power. for a 1.3L at 7000rpm, that means an intake port of about 30mm diameter.
the whole idea is to try to increase the efficiency of the port, and there are many 'black art' theories as to how it all works. if you remove obvious obstructions and sharp edges, you are on the right track.
do not just take it to any old shop that will 'port and polish'. what you need is a shop that has experience with your head and knows what NOT to do, which is more important than knowing what to do 
if you are in Sydney, i can have a look at the head and give you a few ideas, but i have no formal qualifications as such... just a 77kw 1.3L 4K engine 
Cya, Stewart
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 2tgeu head porting and polishing
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Sun, 13 April 2003 13:30
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heck, if the ports are good flowing to start with, a cleanup and smoothing is all they need.
i'll offer my services to help ya do it, or just show you what needs to be done... i just need to find some more of those 3M pads....
i'd love to have a look at another head with a view to improving it's efficiency..
go to
http://www.materials.unsw.edu.au/~sford/
and then click on 'head mod pics' to see some of what i did. i did much more to the combustion chambers after these pics but the pics i took didn't come out. consider the CC's 'roughed out'.
reasonably good views of the ports and guide shaping etc...
Cya, Stewart
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: 2tgeu head porting and polishing
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Mon, 14 April 2003 21:33
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heya stewart, it sounds like you are switch on about what needs to be done to create a efficient head, can i get a contact number off you and i will call you asap, and would love for you to have a look at the head for me.
thanks heaps
justin
0413461518
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 2tgeu head porting and polishing
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Tue, 15 April 2003 02:09
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no probs
0410 677 857, and i'm around the newtown area by night and UNSW by day.
Cya, Stewart
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Location:
Hornsby, N.S.W
Registered:
September 2002
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Re: 2tgeu head porting and polishing
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Tue, 15 April 2003 21:54
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cheers man, i will try to call you today from work, if not i will call you after the long weekend, are you going to the nats by any chance, if so we can catch up.
cheer man.
justin
0413461518
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 2tgeu head porting and polishing
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Wed, 16 April 2003 04:30
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cool,
i am busy all next week (doing presentations and then driving Japanese university professors around the hunter valley in a Tarago but anzac day weekend is all good. friday is a hol then too eh?
gimme a call whenever. nup, not gong to the nats, have too much else on and not terribly confident of long trips
Cya, Stewart
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