Gains from E85 (ethanol) on an N/A bolt on 370Z

1cleanZ

E85 gaining MPG's over unleaded? If you convert a car from a standard fuel system from running Unleaded to Corn, your MPG's will go DOWN due to more fuel being consumed.

This isn't a result of being boosted. If you take a TT 370z and take the MPG readings, and THEN convert to E85 (just as Blake did), your MPG's will indeed decrease.

Will E85 make more power? YES, why???? Ignition point = It means you can run a few degrees more timing (all in the tune)
E85 ignights at 365 degrees
93 Octane Ignites at 280 degrees

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VitViper

Theory and practice are not always the same thing. When I go through a tank of fuel and do a manual calculation at the pump, we'll know for sure.

I clearly demonstrated E85 making power with absolutely zero timing map changes. I've seen this on every N/A car I've converted to E85.

In fact simply stating the fuel allows you to possibly run more timing to make more power is nothing more than an assumption. In many cases I've had N/A motors that want zero timing map changes on the fuel over the pump gas map.

TerribleONE

Nice to see someone try this on a NA car. Having a hard time believing your MPG improved though, mine dropped like a rock

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lj909

Get your foot out of it twin turbo man!

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njobe89

interesting

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2 plus 2 times 2 = ? ... hint, it's not 8

Stillen CBE, Stillen Gen 3, TP's, Uprev tuned - 324whp/264tq

njobe89

so what's all needed to be able to switch from e85 to regular... there are e85 pumps around me at all times, but if you go on a trip, it's not offered at every gas station.

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2 plus 2 times 2 = ? ... hint, it's not 8

Stillen CBE, Stillen Gen 3, TP's, Uprev tuned - 324whp/264tq

TwinTurboZ

I see this on most 370z dynos. What is the wobble in the torque and power curve? I feel it on my car too between 2,000 and 3,000 RPM. What did Nissan do here?

thewobble.PNG

TerribleONE

The car doesn't come into boost any easier on E85, just takes a lot more fuel. Is the increase in MPG hand calculated?

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VitViper

A tune. Injectors if you want more breathing room.

Dash. Which has always been accurate on other vehicles I've converted (such as the new Coyote -- got 13-15mpg on E85, verified manually). I'll verify the reading next fill up, which will be a "combined" mpg (as I do a lot of city type driving as well).

My point was in boost it does consume a ton more fuel than pump. I don't know about you, but even small amounts of throttle input to do light acceleration would put my turbo cars into at least some level of boost, and as such into richer AFR targets than stoic at cruising.

I can give you much crazier examples -- I have a guy with a high c/r N/A 2.5L motor build in a Honda that gets crappy gas mileage on pump, but on E85 he does 40-50mpg -- the car will go from Ventura to Sacramento (California) on 2/3 - 3/4 tank of gas (it's a Civic, so roughly 9-10 gallons).

My turbo S2000 gets 19-21mpg on the freeway on E85 with a built motor. Factory they're rated 22mpg.

These are definitely the exception and not the rule... as usually I do see a 20-30% hit to economy on E85, but I can't say it's "always" after doing it long enough on a bunch of different platforms.

njobe89

which injectors do you recommend?

do i need to switch from uprev to ecutek for the tune or is staying with uprev fine?

i know ecutek offers launch and few more things, but i don't need that

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2 plus 2 times 2 = ? ... hint, it's not 8

Stillen CBE, Stillen Gen 3, TP's, Uprev tuned - 324whp/264tq

VitViper

Whatever your tuner is comfortable with.

You'll make more power on pump just switching to ECUTek. With the timing control being garbage on UpRev you probably will only seem the initial gains from the fuel itself. On top of which you can't really do a true E85 tune without screwing up the load scaling on UpRev IIRC (been a while since I looked).

conor1123

Thanks for posting Vit. Also saw this on your blog. Wish you were down here in AZ so you could mess with my tune! You've tuned like 4 of my friends k20s hah!

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VitViper

AZ to OR isn't that bad of a drive >.> LOL

I should be visiting Phoenix sometime soon, Andrew should be wrapping up his turbo K20 MR2 sometime soon -- we'll see if we can get 900whp+ out of it this go round!

conor1123

My friend was telling me to take a road trip to OR for a retune from you lmao. I've asked about sending logs but it is a little more difficult platform it seems like to etune. Nice! Sounds awesome.

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synolimit

I used GTR's.

What timing are you running? My tuner cant get over 28 on any of the cars. He can tell it to but it wont. Im stuck at 28 on both 93 and e85. E85 lost me around 15hp. It just cant burn the mix soon enough. Is this what you're seeing or talking about with uprev?

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