The best replacement for methanol injection is intercooler.

The best alternatives to methanol injection are rated as following:
★★★★★  intercooler
★★★★★  nitrous
★★  race gas
★  e85
★  nos
  water injection

Your alternative for methanol injection is not listed? Suggest!
Speaking about methanol injection, one probably shouldn't forget about nitrous.

Other search terms related to methanol injection and their ratings are:
★★★★★ nitrous
★ e85
You have in mind a companion for methanol injection and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of methanol injection in all years. Click on graph for more.
methanol injection
intercooler
nitrous