20v on a gze block

[omy]

http://www.ae86drivingclub.com.au/dcimages/7/5/4/536981.jpg

[Hen is a total nutcase]

OK, I am only regurgitating what I have read on the net, so if you look round you may find it yourself.

However I heard that the 20V head will bolt onto the block no worries. The valves will clear the pistons too. However I am not sure if it becomes interference or not. I'd be interested to hear your results if you try it.

Hen

[mattysshop]

i've heard you need the 5 valve fly cut pistons.. which makes sense.. even the dished GZE pistons still have the cuts in them.. small ones..

[omy]

Been looking for some info on the net, with no luck. The clearance for the valves is a concern.

[slydar]

its been done before. you would have to assume the 16v combustion chamber is larger though (wider valve angle) so the pistons would be higher for a given compression ratio. ie, if a 20v and 16v were bother 10 to 1 CR, the 16v pistons would have more volume/be higher, to achieve the same cr, as they need to "fill" more the combustion chamber.

so.. there is a definate chance it would be an interferance engine. you will probably end up with a bit more static compression when you swap to the 20v head. probably why they (20v/gze forced induction engines) go so good.

[omy]

Just got the GZE, take it apart now. Will see how it goes.