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Message: <blockquote data-quote="shiroitenshi" data-source="post: 3214081" data-attributes="member: 27518">But stock car, actually piggyback good enough.. like the stock EK4 my friend has, just have VAFC to tune the lower part of the map after he swapped 2 mugen 4-1.. because as most have experienced, with 4-1, the lower end is worse, so with tuning, it goes back to normal....Standalone is best when you already change the stroke or up the compression(by quite a bit) and intake, for example, when you use B20B crank/rod (with/without block), yet still use B16A P30 ecu, the ignition timing curve is based on the piston speed of a B16A crank and rod, so naturally at some parts of the RPM, you will gain/lose torque.But piggybacks do have a place, except that most people with only intake and exhaust mods, not very willing to use them, because of the tunings cost associated, which usually results in a little or no increase in peak power, which people only see, but don't notice the low/midrange curve of the torque chart.</blockquote>

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