what size would you recommend to use with e85, im really thinking about it because there are over 5 gas stations in my town that sell e85, and is it safe to make an e85 map and a 93 map for when getting a tune? like would i be able to use e85 and then fill up with 93 and switch the map and use it?

How much money would you save burning E85 on a yearly basis? Then, compare to the cost of doing this E85 conversion on an N/A car.

I suspect you'll find, that the cost to transform the car will easily top the minuscule amount of money you'd save burning E85, but that's just a guess.

I would save 700 a year, and do you think the mega fire injectors are good? The ones that I posted before, they are under 300 and a fuel pump is around 100 dollors so it would pay of in around a year, and another reason I wana do it now is because I haven't got a tune yet so I need one either way so might as well convert to e85

What is the price of E85 there versus 91?

Don't ask me on the injectors lol, no clue there.

No 91 where I live, only 93 and it's at 4.29 per gallon right now and e85 is anywhere from 3.30 to 3.50

You realize that you'll need to burn about 30% more E85 to get the same HP as 93, right? Which pretty much eliminates your gains...maybe even costs you more.

He is correct, your not running e85 to save gas but to make power. It will cost more in the long run. Tank for tank with mpg's.

even if e85 is a dollar cheaper? what mpg do people get with e85 on the Z does anyone know?

Likely few if any know (or care) in an N/A Z.

But the facts remain the same - you need to burn about 30% more fuel to get the same horsepower with E85. So take whatever gas mileage you get right now with 93, and subtract 30% or so. That'd be close to your mileage.

E85 never was intended to be a gas saver...back when it first came out, it was significantly cheaper, but it's cost has almost stabilized to the point where its comparable to run E85 or traditional unleaded. In fact, I'd say your E85 prices are obnoxiously high, considering I pay $3.70 or so for 91/93 here...

Lmao. I knoooow... So convenient but those moments that you JUST don't wanna go that way. I have one 3 minutes down the road but i have a regular station right around the corner and from there it's 2 minutes to the freeway. I hate when I need gas some days lol

Has anyone noticed a gain in spool time with the E85?

Why would you see that? The same amount of air is being used, it just takes more fuel to burn it.

i think it does spool faster. colder air= denser air= cooler engine

So you're saying that, because of the fuel in the motor, the volume of air exiting through the exhaust will be higher than if you ran 91/93?

Think about that for a sec before you answer btw :-p

you will NOT save money changing to E85. It will cost you around $1000 for quality injectors, pump, and retune. You will never see that money back. Fuel mileage drops CONSIDERABLY after you switch. On top of that, your gauge that reads fuel mileage and miles until empty will no longer work. Well, they "work" but their readings are WAYYYY off, they are useless. It will tell you that you have 40 miles until empty and then 2 minutes later your -- until empty. E85 conversion is for highly modified cars, not mostly stock ones. Do it if you must, but just know that going into it, you are losing money and features and convenience of any gas station you want, and getting nothing in return. A tuner might find a few HP in it... but youll never know if its from the E85 or just the retune in general. Plus these cars dyno's are so inconsistent from pull to pull, that you might think you made HP when its just the variance you see pull to pull, day to day, anyways