Or just keep coming across as condescending. Whatever.

That's great that you can tune for specific amounts of Eth with a sensor, but we're talking fixed amounts here. E85 has a fixed (relative) content of alcohol. I wouldn't recommend running it in the winter, as the Alcohol content is reduced for cold start purposes. The key is that you do not *NEED* a sensor. I'm specifically discussing a *PARTIAL* tank of E85 at summer blend ratios of ~83%. The content of 25% E85/75% 91 could be anywhere from 1.75-2.2 gallons on a 10 gallon tank if we account for the Alcohol content falling to 70%. thats 17.5-22% Ethanol content, and while that may seem like a large fluctuation, in the grand scheme of things the lower volatility of E85 still makes it safer than tuning with an also inexact Octane of 91.

Yes, comm breakdown possibly.

You would never truely fill up in the traditional sense. You would always just put in x amount of E85 and Y amount of gasoline. So say you fill up at a 1/4 tank every time, and always put in 2.5 gallons of E85 and 7.5 Gallons of Gas. Always keeping your ratio 25%, but never running the pump until auto shutoff.

Or make a mountain out of a mole hill.

I see where you are going with it now and at that low of a percentage I really don't think you are getting the real benefits of going through all the trouble of running e85, at best you would be sitting around 93 octane ish plus or minus a couple points, when full e85 is slightly over 100octane. On a turbo platform i could see it working ok, but full e85 is still going to make more, on an na car you would really want to take advantage of running an oxyfuel as much as possible by running a higher percentage.

If we could run a standalone on this car the fuel alcohol sensor would really shine, you can set them up to increase boost, fueling, and timing as the alcohol percentage goes up and that gives you a lot of versatility, it also accounts for cheap or oxy gas because most fuels now have 10% ethanol in them anyway, it lets you extract every last horsepower in the system under all fuel conditions.

I'm just pointing out the fact that you probably wouldn't roll up to someone you didn't know on the street or just met in general and call them "boy". Just didn't seem warranted. No worries though.


And, now that's getting to my question! I hate to ride the MS3, but through my experiences people on that platform really increase their timing. By as much as 5-6* advanced @ redline over similar 93 octane tunes. I know that with boost it's a different animal, and increasing timing along with boost is a 2 headed benefit.

At what point do we see diminishing returns on timing advance in regards to actual gains on this platform, and I'm curious to see how meth injection or E blends could help this.

Im interested in a blend, because ideally you wouldn't need to change much, if anything, in regards to fuel system.

It's not tough though. Doesn't matter where you live, e85 is never enough of a gap to make up for its mpg loss cost wise. Power wise, sure spend the extra specially with boost.

Good for him on longevity. I'd love to see the inside of everything also how many times he had to adjust the tune like for winter when it jumps to e70.

It maybe main stream and maybe the Z's lucky. Some manufactures though will 100% not have the right fuel lines and seals. Just depends what they wanted to install. Good for nissan if they went with the right stuff. But you still have to make sure the pump and injectors you go with can handle it because not all aftermarket stuff can.

I am na with a few special bolt on's and I am out of injector on 91. a 255 is an easy relatively cheap add on that settles the pump away and I am going to need bigger injectors anyway, so once i finish up with the cam and head gasket change I'm just going to throw in a surge pump with a 400lph pump in it (super overkill but I may add a small turbo) and some bigger injectors. The nylon/hard line on the z is fine for e85 it is the same stuff all the flex fuel vehicles use. There isn't much to change and the motor LOVES timing so from what I have seen there really is no point to not run full e85 (unless you are purely concerned with keeping fuel costs down lol)

Wow, I never would have guessed you would max out fuel on a 91 tune! welcome back to the port injection world for me lol.

Good info. appreciate it. :tup:

With the proper setup you can indeed bump na horsepower by 70-100 I'm up 65 from my baseline now and hoping to add another 20-40 to it.

Inspected everything at 3 years of continuous use, even occasionally letting the car sit for a month or two if winter got too nasty to drive it. Looked much cleaner in there than any car running regular ole gasoline (eww). Actually, most of the parts you wouldn't even know were used by looking inside them.

I never once a single time adjusted the tune for the varying levels of ethanol. In fact, I dont even pay attention to it or care. If youre worried about e70, you know whats worse? e10... now that is something I would never put into my car unless I was desperate. The varying levels of ethanol content seem to only be a problem for those with an ethanol content gauge. I have solved the concern by not having the gauge. (A few percent ethanol difference isnt going to make or break anything.. but it will bother you if you know)

Price difference compared to gasoline? I pay like $2.80 a gallon for it. Ya the gas mileage goes down a little bit but I have no idea what it feels like to care. :) I don't noticeably spend any more or less on gas from the e85... any excessive fuel burning I do I blame on the turbos.

U can get that much gain in HP for NA z engine using e85?

not just e85 there was a lot of other stuff involved, I'm hoping between the cams, the new fuel and playing with the exhaust setup and tune i will get the rest of it. I'm into 5 digit territory with this little experiment so we will see what happens.

What are you experimenting with?

Lots of stuff ;) mainly coke.

Do you have a build thread for all of this? I would LOVE to read it.

you seem to experiment a lot. I remember your plans for the vk56 :tiphat: