Turbo BS Thread

E85 has a higher alcohol content, therefore leading to to burn cooler at an equivalent of about 105 octane gas.
IAT's would be lowered, which allows you to run more timing. As a general rule, 1 degree of timing is roughly 10hp.

The downside is you use more E85 per gallon vs gasoline. Therefore, you need an E85 compatible pump, and larger injectors.
The plus side is more boost, lower temps, more timing, and lower fuel costs.

There's way more scientific answers you can get, but for me as a moron, that's what I gather from it.

 

@dirtdigginjoe
I understand E85 lol
That's a great explanation

The questions is really everything before and after that

 

Yeah with all this alcohol, I’m thinking heads too. I almost feel like the ECU is giving false timing readings or something, because I have no bolt on or plug in timing mods at all, and toyota Isn’t known for squeezing every drop out their vehicles. With straight 91 octane (and meth) it will almost never go over 16 degrees advanced.

 

I guess you would call this a cat delete

 

It’s the E85 for me for certain. I’ve been logging the concentrations of e85 and the effect on my engine comparatively for years (keeping the boost level the same). I’ll have to try lowering the gap and upping the e85 a little, but my (stock) injectors are already maxed out and I’d rather not put them through more stress.

 

Using meth injection will increase your knock threshold. Its all about temp reduction, keeping detonation at bay. E85 bypasses the need for methanol injection because of the gratuitous amount of fuel used, causing an evaporative cooling effect greator than that of pump gas.

If you're tuning, and test driving, and you're hearing what sounds like nuts and bolts being droped on a baking sheet, you may be experiencing detonation and methanol injection would be beneficial. You can also use knock ears, but they are usually used when getting the engine professionally tuned to the knock threshold anyways..

 

I wouldn't need to worry about all this at a low boost, no more than 5-6 right?

 

The stock fuel injectors will max out at 5 psi “in most cases” with zero tuning besides connecting the fuel pressure regulator line to a boost reference. 6 psi might be too much without something (like methanol).

 

They both increase octane or detonation resistance which in turn increases maximum power potential.

 

If you plan on running any type of piggy back you might as well increase injectors and fuel pump that way you can properly fuel the motor and won’t need to rely on meth/alc injection. As most times people do that as a bandaid and while it’ll definitely give you a few more psi safely. Increasing the fuel capabilities is the only way to really go if you ever plan to push past that 8-10psi range comfortably

 

Seems to run better without the cat and it’s louder but that could be an exhaust leak https://youtu.be/B7dcID7it9I

 

if you have aftermarket FPR you can up the pressure to get more out of the injector. This is why I run 1000-2000cc injectors in ever boosted build. Always have room to grow.

 

I've got somewhere around 8 gallons or so (just over a 1/4 tank) of e85 in my truck. I think I'm gonna put 8 gals of e15 in there and see if it runs any better(that should be in the neighborhood of e50 right?) and if it does and the afrs settle down, this will be a decent sign that maybe my gap is too big right? its prolly gonna be just a touch rich I suppose but no worse than it was lean before so it should all come out in the wash haha

 

Its crazy switching the fuel mixture all around. You need a wbo2. You need to run the same mixture. You need to tune out fuel trims and then you will be okay. Mixing the fuel up and around is guess work and your going to run lean one time and burn a valve.

Ask me how I know. Tuning blind is never smart.

 

Get the e85 reader for your piggyback so you aren't changing your tune every fill up.

 

I understand i am just trying to see if less ethanol fixes the possible blow out issue or what ever i am having. Mixing fuel was never my intent for a permanent solution, i primarily didnt wanna drive 20 miles home with my afrs going crazy. And this did for the most part fix the extreme fluctuations... My ltft were pretty (ok really) rich but cruising afrs stayed between 14-15. As soon as i have an opportunity im goin to pull the plugs and re gap them and i plan on going back to 100% e85 on my best tank

 

Sounds like it could be e85 related via the posts above stating e85 caused there blowout. I would not worry to much about crusing fuel trims causing issues. My talon runs a lean cruise around 16 afr to try and get some gas mileage back so my trims are pretty much maxed out so the ECU is not able to make changes. WHen not under load not much can go wrong. I also simulate closed loop o2 from my wbo2 and run speed density.

 

Just read that 1 step colder plugs may foul out alot faster on e85 since it runs alot cooler, if when i pull my plugs to regap i see they are fouled, should i got back to stock plugs?

 

I wouldn't run that E85 stuff. Not sure about the tacos but the flex fuel capable Silverados have totally different parts for everything that touches the fuel over the regular gasser trucks.

 

E85 is primarily cheaper, supposedly pollutes less but also gets you about 25% decrease in mpg so often with the cost savings it's a wash. I'm not sure if it's the best solution to fight pre detonation