K20A3 i-vtec engagement??

**noobie90** · 23-11-2009 08:07 PM

Before anyone says anything i did search but came up with nothing.

So i just wanted to know at what rpm does vtec engage in the K20A3.

**WATAJK** · 23-11-2009 08:14 PM

Si and Base RSX = K20A3. VTEC engagement is at 2200 rpms

Google is ur friend mate

**noobie90** · 23-11-2009 08:52 PM

WOW, 2200 thats a bit early lol. Thanks for the quick replay WATAJK.

**WATAJK** · 23-11-2009 08:53 PM

Originally Posted by noobie90

WOW, 2200 thats a bit early lol. Thanks for the quick replay WATAJK.

yeah well wen i saw that i was freaking out aswell
But thats what i found on google..
Ill double check it as it still doesnt sit right to me...

But aht engine is based On the I-VtecE (E meaning economy)

From Club RSX

You don't loose your VTEC...your A3 motor just runs on 12-valves until 5800 RPMs then it switches to 16-valves.

With the A3 ECU it switches from 12-valves to 16-valves at 2200 RPMs. A2 ECU on a A3 motor with the A3 head will decrease your performance by a lot. A kid on ephatch.com ran a few 1/4-mile tests with the A2 ECU and A3 ECU and he ran high 15s (15.7-15.9) with the A3 ECU (On his stock Si) and high 16s with the A2 ECU on his A3 motor. Makes sense because all you're doing is switching the VTEC from 2200 RPM to 5800 RPM. Also like hotwheelz stated you're running leaner...and it's just not alittle leaner it's A LOT leaner. If you drive for awhile hotwheelz your CEL will come on for being too lean