Turboing a 20v

[Forcefed]

Hi

I am looking at turboing mt 20 valve, now i realise they are a high compression engine and ideally the comp needs to be lowered for a better outcome.

My Question is.... are you able to just replace the pistons in the 20V with 4agze pistons to achieve the lower compression???

Cheers

Forcefed

[upgarage]

can turbo it with high compression
makes for a very responsive and torquey package

as long as the tune is good it should like a while

[reg450]

just get a decomp plate lasered out to suit the 20valve head.and you might want to look in to see if the bottom end will handle boostage

[PLACEBO]

they will hold together with 5-7 psi for a suprising amount of time, without any internal changes.

[PLACEBO]

tho, with saying that, and as already stated it all depends on tune.

[Hen is a total nutcase]

To answer your question, yes you can use ZE pistons in a 20V to lower compression.

The only thing I am unsure about is valve clearance given 5 valves and 4 flycuts in the piston. Does it become interference?

Hen

[PLACEBO]

yes, thats what i was wondering. but as a friend of mine is now currently in the build process of a new motor which consists of such a thing, i guess i'll find out. though im sure it'd be fine.

ask omy, he is currently in the build process http://www.ae86drivingclub.com.au/forums/emoticons/2thumbs.gif

[selk]

yes they do interfer caz the top of the 16v piston has 4 indents in them for the valves while the 20v piston has 5 of course

[Hen is a total nutcase]

yes they do interfer caz the top of the 16v piston has 4 indents in them for the valves while the 20v piston has 5 of course[/b]
Do you say that from experience? Or is it pure conjecture?

The flycuts on GZE pistons are very small due to the piston dish and could very well clear the 5 valves. However I have never heard it directly from anyone who's checked it themselves.

Hen