8V requires a fair bit of work & £££ to make significantly higher peak bhp values.
However, you can bump the torque up in the low to mid range.
This Digifant one has a full exhaust from the downpipe back & has had the head skimmed, slightly increasing the compression. = 130lbft!

You can go nuts on these spending tons of cash only to end up at similar outputs as the standard 16v engines.