thoughts on port/polishing heads...

[WazR32GTSt]

g'day all,

i thought i'd see what some of the knowledgable people on this forum thought of porting and polishing heads *looks at sydneykid*

The reason for this is a mate of mine with an NA Z32 300zx is looking for a bit more guts out of his engine and came across the idea of getting this done.

for the record his mods are: exhaust (headers + cat-back), filter, ecu re-tune.

For the proting itself, what do people reccommend? ie changing valve sizes and complete job, or just a bit of a port? keep in mind this is regarding a non-turbo car...

and what kind of power gains are to be expected on a car putting about 150rwkw at the moment?

For the price one would pay is porting worth it? how much is a good price keeping in mind that its a V6 and there is 2 x heads... I think he had a quote of about 1200 but that included changing to bigger valves i think.

when i heard this i thought a cheaper and also effective idea might be to shave the head for better compression? your thoughts? power increases?

sorry for the abundance of questions but i'd love to hear a bit from everyone as this is something that not many consider (generally better mode for turbo cars bang-for-your-buck wise) and i know its a more intricate process on NA cars...

i also read page 76 in HIP #37 which as porting an SR20DE and that was heaps of help.

cheers,

Waz.

[AnFz]

Iv heard that the VG30DE responds very we'll to this kind of thing.

When my brother took his 300zx TT down to his mechanic, they had one in there that they had just finished on the bosses broject car. He went for a spin in it, and I quote "Pulls much much harder, almost the feeling of the twin turbo but not quite"

Howver I'm not to sure what lengths they went to, or what was involved. All i know is that it was a port and polish.

This place is Nissport in Moorabin btw.

[WazR32GTSt]

so it was an NA then they did this to? what other mods did it have?

i havn't heard of nissport are they anygood?

what do you think of the price though?

[T0nyGTSt]

Don't do unless there's some reason you have to pull the head (gasket, valve work etc.)

The gains are just not worth it by itself.

T.

[B-Man]

Ditch the NA and go the VG30DETT

[WazR32GTSt]

head is meant to be coming off anyway (thus the reason for the thought)

nd no a TT is not an option

anyone else have any thoughts?

[AnFz]

Yep it was an NA and as far as I know it only had a pod and full exhaust.

I'm not to sure on price overall, but I know they charge about $50 labour for usual work.

If you have a problem with your Z, then this is the place to go. Joe is a genius, and his very quick, a lot of people leave happy customers (just ask on aus300zx.com.au). The other guys there know there nissans to. Nobody wanted to touch my GTS-X, these guys didnt have a problem with it

Wouldnt hurt to maybe for you 2 ask them about it if your interested.