[Richard L]

Water/methanol injection does not make power by itself. I am listing out three typical forced induction applications (sensible AFR):

1. Untuned:- Do not inject over 10-15% water/fuel ratio.
- It will help recovering power loss due to huigh ambient of poor fuel octane.

2. Mildly tuned with a few psi of boost increase:
- Inject 15%+ water/fuel ratio

3. Highly tuined with tens of psi boost increase:
- Inject 20%+ water/fuel ratio

When adding methanol to the mix, injection quantity has to be increased by greater 20-50% extra.

Over injection will result in power loss especially with boost increase or tuned. Once tuned, failsafe implementation is essential.


Shams1924...
I like to confirm howerton's comment, either run a small jet or go for 100% methanol ro avoid blowning out the sparks.

Assuming the mini uses 400cc/min fuel injectors. 15-20% of fuel is 240-320cc/min. At present, you are injecting over 450cc/min with a 0.8mm jet. The size is too big for an untuned engine. The reason for your power loss.