the shreksta

iTrader: (20)

i have a pair of newage (blob wrx) heads sitting around,they made 354bhp on my wrx when mapped so i know they are good

can i add cams to them from a different model along with a port/polish and some one piece valves or is it just a waste of money

im still not 100% set on going avcs yet so just exploring other options before i make my mind up

any advice please

cheers

the shreksta

iTrader: (20)

anybody?

also is cracks around the plug holes a big concern? can they be fixed etc?

sonic93

iTrader: (16)

Avcs is ftw mate also work out cheaper than modding your standard heads

the shreksta

iTrader: (20)

yeah i know mate just a pain with the wiring and will i really notice a difference on an everyday car-im not so sure

seems alot have cracks around the plug holes

sonic93

iTrader: (16)

In certain cases 700 rpm yea I would say it be noticeable lol. What ecu you running mate?

the shreksta

iTrader: (20)

i thought it was 2-300 rpm? if i went with avcs i have a jdm wrx ecu to control them

tubbytommy

iTrader: (20)

Yes you notice a difference with avcs.
do the job correctly.

the shreksta

iTrader: (20)

yes sir

what i am concerned about is when i remove my avcs heads to give them a quick refresh what could i do if there is cracks around the plug holes?

jura11

iTrader: (7)

Hi there

Personally I would run AVCS and would just check the heads on the cracks around the spark plugs(there usually cracks) and second bit check around valves,if there are not cracked(if yes you will need new valve seats)

If you want to go extra long mile,then I would add better valves(Supertech),springs(Kelford) and depends on boost better retainers(Supertech) and cams(depends on budget,but Kelford are best for money and if its not the budget,have and search for JDM V7-V8 cams,I think Jap Performance Parts have them in stock for around £200)

Jura

the shreksta

iTrader: (20)

hi jura

i will be using brian crower 1 piece valves and retainers,pretty much a good strip down and rebuild with a better spec but not going to mad.can the cracks be repaired?

jura11

iTrader: (7)

Not sure if I would use BC valves,as many others over here and other forums people use only Supertech,agree they're little bit expensive

Cracks depends how they're deep etc.Some companies doing this,but effort and cost is not worth it to do so


Jura

JGlanzaV

iTrader: (3)

All depends what you are trying to run, standard v3 sti heads will work fine for 500hp...

Mine has no head work what so ever, only issue is a torque drop off from about 5.5k when you go over the limit of the profile of the cam, and needing a slightly lower rev limit, mine is about 7.2k.

When i go for 600+ I will do the heads, but until then i dont see the point so much

banny sti

iTrader: (68)

Avcs will make a good difference not just to spool but will improve torque, this is my old car without the AVCS working



This with Avcs working and 20% meth (which will have a slight affect on spool also)

the shreksta

iTrader: (20)

thats quite a difference mate,looks like avcs is the way forward then

just hope mine dont have cracks in them

JGlanzaV

iTrader: (3)

I will be going AVCS in future, or v3 sti with solid shims etc.

What rev limit would i see with AVCS heads?

And what type of shims do they use?