Golf III GTI 16V too lame

Hello guys, drive a III GTI 16V plus 30hp chip. Unfortunately, the box with the chip only goes as well as a “original” with 150hp. Without a chip it pulls n little more like a normal GTI. Sure, I could put it in the workshop and everything possible on it, but after all, you sometimes also have money worries…. My question is whether there is a possibility to increase the compression when the engine is “sucked out” ?? Drive for example with my Husqvarna TE 610, where the engine au And look – it pulls viiiiel more. Could I also do this with the 16V, or what certain additives are to be recommended ?? For answers I am very grateful.