Is any body running an E30 mixture of E85 Ethanol on stock fuel system?

[Volfy]

Since water doesn’t compress, wouldn’t you also get a very slight bump in your compression ratio Using water?

That's if you squirt in enough volume of water for that effect to be significant. That would also ONLY be true if said water stays in liquid form.

The main purpose of water injection is to take advantage of its high latent heat of evaporation, in order to lower the otherwise quite hot temp in the combustion chamber.

So a good system would atomize the liquid as fine as possible so most - if not all - of it turns into gaseous state, which is compressible.

 

[garrx7]

E30 is better for the plugs than running octane booster. Yes the stock high pressure fuel pump sucks, for E85, but you'll be fine running E30. I daily drive jb4 map 6 E25ish (93 octane+E85), injen air intakes, mbrp catback, rpm inter cooler and ja snorkels that runs mid 11's and I'm fine. Not showing off, just letting you know an idea of where i'm at so you can judge where you can go with an average "any guy" kind of build. I know every car is different, and not every experience is the same. Just my 2 cents.

Are you running stock fuel pump still or did you upgrade?

 

[Thomby]

Are you running stock fuel pump still or did you upgrade?

Most guys running E30 does so on the stock fuel pump. It has sufficient overhead for E30 + higher boost, which is probably 50% higher than stock fuel demands.

I think there are even guys running up to E40-E50 on the stock pump, but that would put you in YMMV territory which is why E30 is the common recommendation. JB4 logs can confirm whether you're nearing its limits.