Increasing EGR flow for better mileage

[Christ]

Oops - I'm not sure that there's a difference, but Methylene should have been Methanol, or Methyl Alcohol.

(Ester of Methyl, also.)

[RH77]

Xylene also has a high octane rating, and can be bought cheaply at paint supply stores. I used to mix 87 Octane, Xylene and a lubricant (ATF or Marvel Mystery Oil) to make 100+ Octane for the Evo. It worked quite well (but is pretty volatile and smelly to have around in bulk).

RH77

[Christ]

Originally Posted by RH77

Xylene also has a high octane rating, and can be bought cheaply at paint supply stores. I used to mix 87 Octane, Xylene and a lubricant (ATF or Marvel Mystery Oil) to make 100+ Octane for the Evo. It worked quite well (but is pretty volatile and smelly to have around in bulk).

RH77

Xylene by itself doesn't have too much of a smell, and MMO smells a lot like very strong peppermint. How could you not like that? LOL.

I have a gallon of Xylene in a bucket with my slickers chillin in it. It removes urethane caulk, even after it's set up (takes a long time, though).

[chuckm]

Originally Posted by Daox

I went to the EV club's build day this weekend and ended up bringing up this project with a friend there. I told him about the two limits that I might run into and that I thought it would probably be the dilution problem more than the pinging. He suggested something I hadn't thought of. Ethanol apparently is more combustible and able to be run leaner than gasoline. So, he suggested that if I run into this limit that I try increasing the ethanol content of the fuel to run a richer EGR mix. So, I now have an option should I find that I can dilute the mixture too much for gasoline (E10 in my area).

I am going to have to do more research on ethanol though. I really don't know much about it.

In this case, I would imagine that the real difference is not combustibility so much as it is the oxygen that ethanol carries. Compared against ethane, ethanol liberates about 11% less energy, but requires 14% less air (3.0 moles O2 per mole C2H5OH versus 3.5 moles O2 per mole C2H6). Comparing ethanol to other non-oxygenated hydrocarbon fuels will yield comparable results. If pumping losses are the big issue, then ethanol will improve performance. If not, the loss in energy will hit you. (I suspect that certain high performance engines prefer ethanol for this very reason... not only does the higher octane allow for higher compressions, ethanol also requires less air in an already air-limited WOT system.)

[RH77]

Originally Posted by Christ

Xylene by itself doesn't have too much of a smell, and MMO smells a lot like very strong peppermint. How could you not like that? LOL.

It wasn't bad, until...

The Great Thankgiving Xylene Spill of 2004

On that cold November day, I was adding roughly a gallon to the tank, with the garage open for ventilation. My gloved hands slipped in the cold and gravity took over. The container fell and deposited the contents onto the floor.

Situation: critical. Whatever it came into contact with, began to break down: melted shoe soles, even a tire started to break-down. A headache soon ensued with the fumes. With its volatility, there was a concern to start the car, so I pushed it into the driveway and ran a fan or 2 at a distance to start the evap process. I was hoping it wasn't noticed, when...

The odor hit the house. I knew I was sunk when my soon-to-be Mother-in-Law was quoted to say, "Is Rick painting?" The place cleared out. Oops. So, Xylene doesn't hold a positive "aromatic" memory.

Moral of the story: handle Xylene carefully!

RH77

[Christ]

And to think, I used to wash my arms/hands w/ the stuff.

(Not so smart, in hind sight. I may or may not have a "tick" because of it. )

[Daox]

Well, I kind of have an update for this thread. About two months ago I picked up an 05 Chevy Aveo with a busted timing belt (which snapped a few valves, messed up the head and pistons). I just got the new engine in and took it for my first drive last night.





Anyway, here is a picture of the new engine. Notice the same EGR valve that I have in my other pics/video. So, I will be monitoring how the EGR valve is used in the stock application. After understanding how its being used, I will likely do some arduino magic to play around and increase flow if thats even possible.

[Thymeclock]

An AVEO???

Who, in their right mind would want an AVEO???

hahahahahahahahah!!!!!!!

See you elsewhere... )

[Phantom]

The Aveo has a 1.6L 4 cylinder correct? Do you know if it shares a block with a different motor like on of the 2L?

[Daox]

Apparently the 2.0L from a suzuki forenza is a direct drop in. I don't think they share a block though.