late model Ze pistons with 20V head

[lorolla24]

Can anyone tell me if you have to use the early model ze pistons with the dishing at the top to clear the valves from the 20v, or is it possible to use the later model ae101 ze pistons aswell??? going to turbo my 20v.

[vvega]

its just becomes a interferance head
so dont brake a cambelt and youll have no issue

v

[matt dunn]

isn't a STD 20v an interferance engine anyway?

(That's a question not a statement)

Matt

[10k 20v]

non-interferance

[JT]

non-interferance

Piston to valves yes, but inlet and exhaust valves can still meet and make a mess.

[rollas22]

The older ZE pistons (AW11) will not clear the oil squirters in the 20v bloack and will need to be machineed to clear, but the newer ZE pistons have a slot already for them.
Ive done the 20v turbo conversion and nufing hits as long as you have the cambelt set correctly you are safe, otherwise you'l bend a valve or 2 somewhere along the way (rebuild head time)

[lorolla24]

Sweet, i'll be able to sleep at night now. I'll just turn the engine over by hand when its all back together and see what happens.

The other thing is, the plenum. I've heard std ones can expold at with highish boost. Where abouts doe's it blow??around the seem...

[rollas22]

I heard that too, so i got a custom intake plenuim made up from 304 polished stainless. Looks good and holds the Boost.
Can get my mate to make you 1 up if u like?
has the boost gauge adaptor on the side.
heres a pic of it http://www.lazerphoto.co.nz/car/4AGTE1.jpg

[lorolla24]

I want to keep the std one cause its been designed to give the engine low down response i believe, So i want to know where it breaks?? I could have a guess and say on the bottom where it has been folded togther and if it is i will just mod that area and beef it up alot.

Doe's ANYONE have some pics or know where they break???

[vvega]

mine blew at 6psi
rolaas howmuch for one of those

v

[vvega]

they split at the seam and you cant weld then up as they have a rubber sealing layer

been there done that

waste of time

v

[spencer]

the trumpets arent gunna do you alot of good when turboing, check out redmists posts on helmholtz tuning youll find when turboing you dont have to worry about it

[rollaholic]

that intake plenum looks amazing, you know if he can make one for a 16v head? (4agze)

[rollas22]

i talked to him lastnite, and his boss is packing a sad about him making these things in the workshop so i think he not guna make them anymore, but will check... its a dam nice intake!