WILL this bolt on without mods ???, swap a 4AGE 20 VALVE with FORGED TURBO PISTONS 8.5:1 on my 1995 ST Options

[Culpable04]

I was told that the engine 4AGE 20 VALVE with FORGED TURBO PISTONS 8.5:1 will bolt on my 1995 ST without mods ??? I don't know about the topic so I would like some of you with more acknowlegde to let me know if this is true on not ???

This post has been edited by Culpable04: May 4, 2006 - 10:55 AM

[playr158]

isn't the 20v 5 valves per piston, your 7afe only has 4 per piston,..........unless you're talking about head swapping?

wat do valves have to do with the pistons?
if you do a search there is a pretty lengthy discussion on this topic

He mentioned 20 valve because it helps identify what generation 4age engine. He wants to take the pistons from the 4age (20 valve) and put them into the 7afe. From what I remember readying is, yes the pistons will fit on the 7afe rods BUT it will increase compression of the 7afe and it will not float on the rods properly. But it is believed once the engine heats up the pistons will float easier.

if you read the 7afte sticky (on compressor maps and ect.) you'll see a section on the 4ag(z)e piston and your right they do increase compression to about 11.XX:1 in a 7afe motor which can be helped with a 2mm headgasket but IS NOT the best way to do it. and i highly doubt the warming of the motor will help piston float cause the rod also needs to be machined for an oil passage i believe. Doggy tried it...its a no go.. the best way if you want forged pistons in a 7afe is to have ARIAS, CP, JE or WISECO make you a custom set probably around 800$ or so