whats the use of port and polised head?

[NVD52K]

hey guys i was wandering what port and polished head was ? everyone tells me to do it i dont know what performance or anything it does?

[TEGZOTIC]

basicaly they let your engine head breath easier and smoother.. by polishing air can flow thro a lot faster and porting obviously alows a larger amound to go thro,, for a na car its a good thing to do. i think your looking around 700buks mark to do it, if u bring the head to the shop

[beeza]

That's cheap! How much would a d-series cost,in Queensland?
I have some great pics I'll get up soon of P&P work.Never had it done but it looks like it would greatly improve air flow.
Should port match the intake manifold and maybe put a bigger throttle body on aswell.

[NVD52K]

so what all mechanics do it? also bigger throttle body ? where can i get that from is there any after market throttle body for s2k?

[ludecrs]

larger TB for S2000's are rather pricey.

I advise searching S2ki.com for more info :)

[.::F[L]Y::.]

so what all mechanics do it? also bigger throttle body ? where can i get that from is there any after market throttle body for s2k?

most of your questions are kinda generic. search on the s2000 forum will help out alot.

As far as aftermarket Throttle bodies go you can buy a spoon TB which is like 700 bucks. From memory i think its a 70mm tappered down into a 64mm. Reason for this is to increase the speed of air flow hence better throttle response. From what i have looked up you can also use throttle bodies from a b series engine which is generally alot cheaper as it doesnt come with the 's2k' price tag lol. BDL is another brand you can look into.

imo, before you go PNP your head id recommend doing all the basic mods first such as i/h/e + final drive. These would probably be sufficient in making the S more fun to drive. I would also recommend considering going for a an actual tunable ecu (not the vafc crap or emanage stuff)

[WhiteAP1]

I wouldnt bother PNP at all. Its pretty much perfect from stock and i seriously doubt you'll find a mech in AU who can improve on it. Throttle bodies look good, sound great, are illegal in most states and need some serious tunning. Like fly said slapping these things on a stock engine is pretty much a waste of time. i/h/e/+ final drive and a higher compression should do you nicely and a decent ECU (hondata/motec) after all that you wont even think about PNP or TB.

[beeza]

You have to check out if it will be beneficial to you or not.Need to do some research into your particular application.Doing the other mods first is a must.I think you will find you should change the cam b4 you get P&P work done.
Here's some pics of P&P work on a d-series head:
D16a6 head b4 some work:
Exhaust:
http://i99.photobucket.com/albums/l287/beeza2/PPD16A6HeadB4somework-1.jpg
After a P&P:
http://i99.photobucket.com/albums/l287/beeza2/PPafter-differentangle-1.jpg
Different angle:
http://i99.photobucket.com/albums/l287/beeza2/PPafter-1.jpg
Some more examples:
Intake:
http://i99.photobucket.com/albums/l287/beeza2/20051205_105337-1.jpg
Exhaust:
http://i99.photobucket.com/albums/l287/beeza2/20051205_105322-1.jpg
Cross section of a d16y7 head with a polish on the exhaust side (not sure if it's been ported?):
http://i99.photobucket.com/albums/l287/beeza2/4-1.jpg
http://i99.photobucket.com/albums/l287/beeza2/Y7Headcrosssection-1.jpg
Dimples,like a golf ball for aerodynamics:
http://i99.photobucket.com/albums/l287/beeza2/PA220016-1.jpg

[WhiteAP1]

Bezza that looks very pretty, but this is an F20C not a d series or a b series where there is ample room for improvment. After 8 years of the car being around the only ppl who even look at PNP are those with 2.5 ltr kits and even they find very little improvement if any. Its not commonly done because there is no real benifit. Like i said, in this aspect its pretty much perfect from stock. There are other areas to improve on.

[beeza]

Yeah,I'm not sure about this engine.Just thought I'd share some pics of a P&P job :)
But after all the bolt on's,valvetrain (cam,cam gear,springs and retainers) are done wouldn't you still see benefit from a P&P?
As long as you get a dyno tune after offcoarse.

[Andw0o]

well even after all the above are done... i dont really think there would be a point in p&p, as we've all pretty much stated, the engines already at its potential in that particular area, its not even close to that of a dseries and what gains you would get from a p&p of that.

[NVD52K]

where in sydney can i get my final drive done? and how much would it cost roughly i got a full toda exhaust system coming in already next to come is cams and ecu

[.::F[L]Y::.]

^^ i can get you in a kia oem 4.77 final drive for $450. im actually organising a gb on s2ki.com if your interested pm me.

[MattiK]

my work

[beeza]

Damn that is real nice.Any more close ups?

[CRXONE]

Rather than Port and Polish $500 you'd be just as good off taking a dump or taking out the spare wheel

[beeza]

If that was the case then why do so many people do it?

[90LAN]

type r b series heads are PNP from the factory
oem quality right there

[beeza]

Nice,stock P&P FTW!!!!

[SeverAMV]

actually, theoretically and scientifically, there is only a real benefit from porting, there might be no real benefit from polishing depending on your setup. its good to have a slightly rough/textured surface so that when the fuel hits the head, it vapourises, which aids in complete combustion, which improves power. the rougher the head, the greater the surface area that can be used to vapourise fuel. altho too rough and it will hamper the flow of things like has been mentioned before.

[MattiK]

Rather than Port and Polish $500 you'd be just as good off taking a dump or taking out the spare wheel
better is doo both :-)

[beeza]

Haha!!!

[AusS2000]

Throttle bodies look good, sound great, are illegal in most states and need some serious tunning.


I have a feeling you are getting confused with INDIVIDUAL Throttle Bodies.

[WhiteAP1]

Yes ITB, otherwise we'd all be driving around with 'defective' stickers.