Going from 100% meth injection to 50/50 water/meth

[blockd2]

So I have found many posts and arguments on which is better but I would like to know If I could go from 100% to 50/50 without a full dyno tune. Currently tuned on 94 octane and 100% meth injection. I live in Victoria and there is not an awd dyno here. Could I get a street tune on 50/50 without any problems?

 

[jtmcinder]

If no-one who knows better replies, I'd say that, unless you were tuned to the edge on 100% methanol, you could probably go to 50/50 (windshield-wiper fluid) without any changes at all.

 

[YZFR1]

It's hard to say if you will or not need a retune as that depends highly on the state of your current tune and setup. More than likely it would need to be touched up for sure, in my opinion.

In a nutshell, if your setup is octane limited than 100% meth will be able to make more power. If you are just trying to max out a non octane limited setup than 50/50 will be more beneficial, practical and make more improvements over a wider range of temepratures, as water and methanol actually complement each other. Also, contrary to what some people believe water doesn't displace effective octane.

 

[hubz91talontsi]

Premix Water Methanol : DevilsOwn Methanol Injection

 

[Black'95]

Street tune should be fine, but I'd definitely make sure you're not knocking after you change the mix. I know when I changed my mix to more meth instead of 50/50, I was able to get a bit more out of it, but like they said, it depends on your current setup/tune.