Home made E50 for racing?

Pump E85 during the winter months is often around 50% alky. Summer mixes are higher.

Today's rubber FI hose that is sold in parts stores today is alky compatible.

You can drain the carb for long term storage, run it out before you shut down the engine or have a small one quart tank that you switch on and use that to start and shut down your engine.

I have two methanol carbs I bought used... Not one sign of corrosion after several years of use before I bought them. Not everyone has issues.