Porting Heads, worth it?

[SpecB]

Since the heads have got to come off to get the valve seals replaced I was thinking of getting them ported/polished I've had a very good quote from Paul Finch which I'm thinking of going for - how much of a difference am I likely to see on std cams?

[Anger]

My valve stems need doing aswell... but im just going to look out for some JDM big port jobbies

Porting & polishing will smooth things up & certainly help. If its a good price then why not.

[Hongkongfooi]

which heads have you at mo Nick?

[C. J.]

Cams , valve springs , valves & retainers and a smooth out will see most gains / safety

[SpecB]

Originally Posted by Hongkongfooi

which heads have you at mo Nick?

I think....... they are Sti 8 (2.0) Single AVCS heads (UK spec)

Definately AVCS and only inlet side but they were supplied as part of my build.

Originally Posted by C. J.

Cams , valve springs , valves & retainers and a smooth out will see most gains / safety

C.J - I guess it would be worth looking at new uprated valves and springs/retainers when the heads are rebuilt/ported - any suggestions? Pretty certian I won't be able to afford new cams and only plan to stay around the mid to high 400's (well until I get the block pinned )

Originally Posted by Anger

My valve stems need doing aswell... but im just going to look out for some JDM big port jobbies

Aren't these dual AVCS? If so will my Syvecs run them? Also I guess they'd need opening up to match the bores on my 2.5 plus I read something about getting the combustion chambers sized to suit the 2.5 or is that the same thing?

[C. J.]

Super tec valves & spring set