ECO vs Non ECO

[Chris Denton]

This might have been discussed already in the forum but...

What makes the ECO version Corolla’s have a higher HP rating?

 

[jolly]

Not that keen on all the technological details but basically, electric control of valves. Valvematic (vs VVT-i) allow continuous control of valve lift so the throttle valve remain open most of the time, reducing pumping loss. The compression ratio is also of 10.6/1 (vs 10.0/1).

 

[Shok]

Eco engine is 2ZR-FAE (non eco is 2ZR-FE) which has variable lift aside from dual variable valve timing. It alsp has higher compression as previously mentioned.

 

[Chris Denton]

Ok, so it’s not like it has a different intake or something like that. Got it.