January 4, 2007 - Editor's Note: I normally don't like to hijack Terry's column, but I thought I should do so in this case. You see, Terry knows a thing or two about building drift cars. I know he's mentioned it a few times, but it's worth re-stating. If you have a question about drifting, drift-car set-ups, etc., Terry's the man to ask. I got a letter in the regular IGN Cars inbox asking if Takumi's 11,000 rpm Trueno motor was actually feasible or something that can exist only in Initial D. I sure as hell don't know the answer off the top of my head, so I shot it over to Terry. Go ahead and read this column to get the answer!
will try to give you the best explanation possible. The 4AG engine that you are asking about came from a front wheel drive Japanese market-only Corolla (chassis code AE101), and the biggest feature that it has over previous models is an additional valve in the head for a total of 5 valves per cylinder. The 20 valve (20v) motor came with individual throttle bodies (ITB) for improved response and torque (bonus effect was the sweet sound of ITB's) and the new 4AG was also fitted with a VVTi unit for the intake cam. In stock form the motor has a similar rev limit to the venerable 4 valve motor, but since the additional intake valve allows the motor to breathe so much better the 20v will have better performance on the top end.
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