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<blockquote data-quote="pcmoddingmy" data-source="post: 3534803" data-attributes="member: 25616"><p>Not worth doin' it, not cheap and almost impossible to fit 20V piston on 16V 4AFE. Better look for 4AGE 16V (140hp) piston instead or other types of hi-comp piston suited for 16V engines (mivec/vtec). Also need to rebore the engine, balancing and customizing the engine to suit the new pistons. Not sure if you can find metal gaskets for 4AFE though. If you do, get thinner metal gasket to further increase the compression. But remember, hi-comp engines tend to have knocking and hi-temperature. So you'll need to use better fuel, cooling and maybe management. Timing is critical on hi-comp setup.</p><p>Perhaps the easiest way to "feel more power" on your current engine is to fit a BT 5spd (C56) gearbox. </p><p></p><p>P/S: You might want to search on some Thai forums for mods on your 4AFE. Those guys have some pretty fast 4AFE on their corolla.. even 4-throttle on 4AFE ;)</p><p></p><p>Just my 2 cents <img src="https://zerotohundred.com/forums/styles/default/xenforo/smilies/driver.gif" class="smilie" loading="lazy" alt=":driver:" title="Driver :driver:" data-shortname=":driver:" /></p></blockquote><p></p>
[QUOTE="pcmoddingmy, post: 3534803, member: 25616"] Not worth doin' it, not cheap and almost impossible to fit 20V piston on 16V 4AFE. Better look for 4AGE 16V (140hp) piston instead or other types of hi-comp piston suited for 16V engines (mivec/vtec). Also need to rebore the engine, balancing and customizing the engine to suit the new pistons. Not sure if you can find metal gaskets for 4AFE though. If you do, get thinner metal gasket to further increase the compression. But remember, hi-comp engines tend to have knocking and hi-temperature. So you'll need to use better fuel, cooling and maybe management. Timing is critical on hi-comp setup. Perhaps the easiest way to "feel more power" on your current engine is to fit a BT 5spd (C56) gearbox. P/S: You might want to search on some Thai forums for mods on your 4AFE. Those guys have some pretty fast 4AFE on their corolla.. even 4-throttle on 4AFE ;) Just my 2 cents :driver: [/QUOTE]
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