Turbo Upgrade?

[suchafunkymonkey]

I've seen a few comments relating to the introduction of a turbo to the 4AGE engine.

Has anyone done this to their mk1? It seems it was intended for the Corolla with the same engine, but never made it to the MR2.

My MR2 doesn't need a turbo, but that's not the point

[Protok]

There were kits out there for it but they are long discontinued. If you're into Hen's teeth then you could look for the HKS twincharging kit for the 4AGZE.
I'd look at using a small turbo like the TD04 but of course you'd need a custom manifold and standalone ECU which aren't cheap as you have probably guessed.

[PaulWoods]

Bottom line is it will cost you the same to turbo a 4a-ge reliably as it would be to install a 3s-gte into one, and that engine trounces the turbo'd 4a-ge in every department before you even tune it.

Ultimately a no brainer when you think about it.

[fingers99]

Paul is right, of course. But there may be some advantages in turbocharging a 4age (none of them financial, though!).

There's one featured in Mark Warner's Street Turbocharging (HP Books). It features:

AGZE engine, stock rods, pistons. 1mm oversized valves, T25 turbo (from a Mitsubishi Eclipse), Megasquirt, one off weld-el (think steam pipe) 40 schedule manifold, intercooler from US market Ford Probe. And so on.

Difficult to know what it would be like on the street (used in US autocross), but the curves suggest something handy:



So, if you can fab, weld and solder (and have an AGZE engine in good nick lying about) it's not completely out of the question.