Turbo BS Thread

If the injectors don’t flow enough will that make it have less performance than just 91 octane

 

It will lean it out and do some damage i imagine

 

Just to be clear @Jstand the biggest reason to use e85 is the detonation resistance. Most people compare it to 105 octane fuel. It also has the neat characteristic of making more torque under rich afr conditions. Meaning at WOT and 11.5:1 you will be making more torque on e85 than even 105 octane gasoline.

 

Well if they can't flow enough, you'll get fuel-cut and lean out. Same as if you were running pump gas. When I had my Subaru, it was safe to assume by going E85 you would upgrade your fuel pump, and go up 2 injector sizes over your current size.
But the advantage is you can run more boost, as it's pretty similar to 105 octane and responds well to running slightly rich

 

And to be even more clear if you aren't running 11.5:1 afr under boost your engine will explode.

 

Is this mostly to keep temps down under boost?

 

That's a big part of it.

 

Yes, the entire purpose to over fuel is to cool cylinder temps as the fuel evaporates and reduce detonation.

 

Doesnt e85 also cool, similar to how water/meth works?

 

OK I’ll probably try mixing it in and just keep an eye on the AFR’s but if it cools the engine and raises the octane wouldn’t it lower the AFRs

 

I’m running the pink tops

 

I dont really know what that means man. E85 tales about 30% more fuel than gas. If u had to had pink tops to run regular at ur current boost level i would say they wont be enough on e85 unless there is a little extra head space somewhere in there

 

OK so the E85 will lean it out I guess I won’t use it Maybe I’ll get the meth water injection next kind of confusing but it did run pretty good on 112 octane racing fuel

 

U might could rig up like a 5th injector and that would be a 25% increase and might work out perfect who knows

 

Mine is at 12.3 steady

 

E85 requires 20-30% more fuel since it's less dense than gas. So yes you will run lean without tuning and larger fuel pump.

Meth injection will lower chance if detonation so you can run more boost and timing. It acts as fuel so will make you run more rich lowering injector idcs so you don't need more injector or fuel pump.

E85 is the way to go for power. My talon made 300/300 whp/tq at 17psi, 10.5 afr and 15* timing on pump gas and I was maxed out. 2-4 counts of knock on data logger.

E85 tune made 405/430 whp/tq at 32-36psi, 12.5 AFR 22* timing. Zero detonation. Zero timing pull.

 

Should I be a jerk and say that e85 has a different lambda but you have a gasoline afr gauge.

To run e85 you want cruising to be at Your 14.7 still
Spool up about 13.5 and wot at 12.1 to 11.5.
This is reading with a gasoline afr gauge.
Putting in e85 without tuning your open loop you'll see your truck go crazy lean.
Zoom zoom boom real quick

 

That’s because of the simpler molecular structure (9 atoms vs dozens) as well as the higher endothermic reaction rate. Basically it turns into a gas from liquid way faster and easier than gasoline and that reaction obsorbs more energy (heat), therefore increasing the temperature differential between the vaporization phase and the combustion phase. Higher temperature differential = higher thermal efficiency = higher torque output.
EDIT: and yes, running pure e85 on a regular gas tune at 11.5:1 AFR (open loop) will result in an AFR of 15.36:1 (on a gasoline calibrated gauge).

 

Ok thx everyone i just want to mix in 3gl or so with a tank every once in a while and my afrs are good

 

Depends on the outlet size of the turbo.