[Richard L]

No, you just inject nitro only - no water.

I have just given you the stoichometric value for nitro. This is the same as giving you a stoicometric value for gasoline as 14.5:1

Much much stress your engine can take is not know. If oyu read the earlier post, you will see top fuel drag car now run almost 100% nitro.

I think 80% notro and 20% methanol will gusrantee that the mixture wil be on the rich side of stoichometric.