I think a confusing thing that is causing a lot of back and forth in the E85 threads is the 2 different interpretations of "what is needed for e85"?

When people ask this question, they can mean it one of two ways:

1: what is needed for fuel system compatibility with e85
2: what is needed to support the flow/volume for e85

But rarely specify which of the 2 they are asking.

The replies come in the same 2 flavors, and again, nobody specifies which question they were answering.

So I would like to reiterate here that for the sake of E85 compatibility, nothing in the 370z needs to change. For the sake of E85 flow/volume requirements, most people will need injectors and/or pump, and maybe a RFS, pending what they already have in there and how much power they intend to make.

It didn't work out so you bought a different car? holy crap lol

Are you saying I won't be able to have a pump gas tune and E85 at the same time?


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I don't want E85 if it going to make me drive a FRS!


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The answer to that is in the question: Has anyone tuned a 370z with gasoline/93 and 1000cc injectors?

I tried and wasnt able to get it to run clean... but it was also my very first time even opening up the UpRev software. Thats why I originally made the switch to E85, as a bandaid to water down my injectors since I wasnt able to get them to run clean. But I got hooked on it and never looked back.

I wouldnt be even remotely surprised if more experienced UpRev tuners have done it without a problem. Heck, I might even be able to if I tried again now.

I believe DM is running a 93 tune and finishing up his e85 tune so he can run either if ever required.
Jwillis, you can run multiple tunes, but if going to e85 I would just go all the way to make it easier. Though need to evaluate your e85 stations and plans with the car.

E85 with a Stillen supercharger?
 

Fuel return system




This is correct. I want to be able to run both. 93oct on huge injectors with a beefy fuel pump likely caused a bunch of my issues.

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Well that sucks! Glad I asked, I just looked it up and there is only one E85 pump around here and it's a long ways from me!

Bear in mind that E85 burns 2-3x faster than regular pump gas too (iirc) so you're gonna need to know where you can fill up at all times.


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I wouldnt depend on the out-dated websites. I would ask locals who run it... they will know where it really is. At least around here, the websites show places having it that havent in a very long time, and do not list many of the places that do now.

Ok I'll ask around, my tuner knows where several are but he's 1 1/2 hours from me.


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Hmm... That also means I need place between me and the Florida tracks, this could be a problem because I travel through the middle of nowhere.

http://tapatalk.imageshack.com/v2/14...622e44545d.jpg

This looks hopeful, I guess I need to start checking places out and see who really has it.


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Well off-topic, but I am taking my race car to Philip Island tomorrow for a test day (been chasing a drive-line vibration for 2 meetings now) and my car uses 4 litres/lap (4.5km per lap), and the test plan for the day calls for 5 sessions of an out lap, 4 timed laps and an in lap, so I am expecting to use 80-100 litres, which is 5 20-litre tins (no E85 offered at the circuit fuel dump), so I understand your point precisely.

E85 is great for making good power and keeping the engine cool, but f4rk you use a lot of it !!!

There are a couple phone apps that are pretty accurate from what I've seen so far.


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Know what they are called?

Yep. I'm driving around like that right now :)
If you need help getting the tune straightened out, Frank Hill (Hill's Garage) wrote my maps from scratch. He's a whiz with Uprev.

You will need two separate tune maps for E85 and 93oct. Your car will be extremely unhappy with you if you try to run the wrong gas with the wrong tune. How unhappy? I don't know but I certainly don't intend to find out. Wrong timing = really bad things happen. Uprev holds 5 maps so once you get it set up right you can just flip back and forth provided you completely drain the tank before you flip.


FlexFinder is the one I tested out. It was accurate for the 3 stations I visited.
I also have one just called Flex-Fuel that I haven't really played with yet.

I wish Gasbuddy would add E85 but oh well.

I have three now, 93, 93 with meth and one that only goes 60mph or 4000 rpm( I let my son take the car to prom).

I have put 93 in and driven on my e85 tune. I stayed out of boost because it would be too much timing and too rich, but just driving around mostly low throttle, other than the terrible smell of pump gas without cats, im not sure i could tell the difference.

So i guess that right there is my 1st person evidence that 1000cc are fine with 93 LOL, it was probably just something i was screwing up when first starting tuning.

Don't have that luxury with a supercharger. I mean, you could keep it really low but it's not like a turbo where you can just keep it completely out.

To be fair, it took Frank who is a wizard with Uprev almost a full week to get it right.

mmm yes meth injection. I have been toying with the idea of a meth injection kit for a while. I already have all of the necessary supporting mods I think.

Just to add to the 93 map? I thought meth+93 was lower octane than E85?

:iagree:

Yeah wasn't sure about this or whether there was any benefit to E85 + meth. Turns out there isn't so nevermind :)


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Check the finished builds. I have ID1000s and I am on 93. I would do e85 like Phunk, but I can't reliable make my trip from Fort Hood to Baltimore without risking getting stranded somewhere and/or carrying fuel with me. So 93 it is........

Edit: so it seems I never added my info to the finished builds (damn son, where'd you find this?). I just submitted my info, lol.

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I had no problems keeping the car in vacuum when I was supercharged. Stay light on the throttle and the BPV stays open.

I'd rather just not chance it. It's easy enough to flip between tunes.

Is it a lot more expensive to run E85? I'm moving to Albuquerque NM in about a year and a half and they don't have 93, but they do have a few E85 has stations so I'm considering just changing to that

It's a coin flip. It's cheaper per gallon, but your mileage will drop.

"significantly"

I questioned Phunk about this adamantly. I was going to make the change, but I needed to know that I would have the range to make 400-500 highway miles. I can make 500+ highway miles on 93 OCT, but I barely get 225-250 miles stop and go. Charles said that he hasn't attempted any long range trips with his setup and could not give me any good feedback, but he did give me a wealth of information on stop and go, local/short range trips, and spirited driving. Let's just say that he has a good idea of where all of the local stations are that carry E85 in his area.

So if you loose say 30% of your fuel economy AND sitting right at the edge of vacuum/boost for max efficiency, that would put my best range at 350+ miles highway and 157-175 miles stop and go. That is no where near what is necessay to make it the distance from station to station (that sell E85) in some sections of I-20E (my preferred route) or Arkansas, Tennessee, and the Appalachian Mountains. Pretty much screwed as soon as I leave TX until I make it to the East Coast states.. That is why no E85 for me. If you a planning to make the switch, please do your homework or get another vehicle to DD. And for reference, my other vehicle is an 04 Tahoe......so much for efficiency.

I dont get to leave town much! The furthest I generally get is about 100 miles out, in which case I can do that round trip on a tank.

You arnt screwed just switch to ur 93 map and put 93 in and good to go.

It's not quite that easy. You have to have the tank completely empty before you do that. These aren't engines that are designed for flex fuel that automatically adjust the ECU based on fuel mix. It's 100% one or 100% the other.

Get it down until the gas light has been on for a few minutes and that will be enough!

Yeah shouldn't be an issue. 93 here has 10% E anyways so my tunes probably fine to run it almost dry and switch the map and fuel. Come winter the E drops to E70 so you're even closer.

Exactly, its not that sensitive. Just for the sake of seeing the actual difference, lets look at some math:


Say you make the switch with 3/4 a gallon of E10 gasoline left in the tank...

In the tank you have:
0.075 gallon ethanol
0.675 gallon gas

You add 18 gallons (it should take more like 18.5) of E78 (just a random typical "e85" pump content):

You just added:
14.04 gallons ethanol
3.96 gallons gas

You now have in the tank:
14.115 gallons ethanol
4.635 gallons gas

With a total 18.75 gallons in the tank:
14.115 Ethanol / 18.75 total = .7528%

You have E75 in the car. This will not be a critical difference from E78.

Exactly!!! And if u really want to u can make a custom map for 50/50 so if u have to fill up with 93 at before a long drive u dont have to waste the half tank in there by driving around till E

Don't mind me, I'm just paranoid.

Or you can go to your local track with a gas container and get E98 for $4/gal and then add in the difference to bring you into the safe range. Ive done this for a road trip once.