Is it possible to put turbo in an Eclipse GS?

Swap it for the 4g63. Unless you just want a little boost. Do your math if you stick with the gs engine. You could bolt on the charger and then do the swap after you break something.;-)

If u really like the 420a u can jus turbo it...or take it apart drop compression etc....and try to break the 661 whp record ...but no u cant swap it the 4g63 wont fit in the same mounting places