KA24DE 11.3:1 comp ratio fuel alternatives?

[Didderson]

I've been toying with this idea for a long time now. Since my car has the SOHC pistons in it, I've been wanting to test mixtures of low grade octane and some type of oil mixture. A cleaner oil such as vegetable or cooking oil. I would also like to try mixing some alcohol into my fuel.

I'd just like to see what I can come up with and I know that primarily this idea is reserved for diesel cars but I believe with my increased comp. ratio that it should be easier to run a mixed setup. I really don't know where to begin and I do not have scientific equipment available at my house for testing mixtures. I could probably get into the labs at college though even though I'm not a science major or w/e.

I'm just interested in running cheaper gas with the oil to keep the octane or combustion rating higher since of my comp ratio, and definitely saving the environment from harmful fumes at the same time. I'm not really interested in it for the money savings at the moment, so please don't knock me for that.

If anyone has more success researching this topic I've not had too much time to search, but i only found zerothread?id=43752 which is a turbo'd setup anyway. I'm N/A.

I'll talk to my environmental engineering professor today about it, see if she knows anything about non diesel biofuels.

[S13FX]

Get 30% bigger injectors, and run E85. Should work just about perfectly with out much tuning since, you need about 30% more E85 for the car to run .

Also E85 is rated between 104 to 108 octane .

You could slap on a wideband and a SAFC for fine tuning ...

[Bow]

Yup...

E85.

Drop in some SR injectors and run it.

The tune is even good, as we checked mine on a wideband.

With the SR injectors, you will run too rich if you switch back to normal gasoline.

I have been running e85 with SR injectors in my KA24DE for 6 months.. runs great, broader torque band, reduced my gas mileage to about 20 mpg.

[roosevelt]

I've been toying with this idea for a long time now. Since my car has the SOHC pistons in it, I've been wanting to test mixtures of low grade octane and some type of oil mixture. A cleaner oil such as vegetable or cooking oil. I would also like to try mixing some alcohol into my fuel.

I'd just like to see what I can come up with and I know that primarily this idea is reserved for diesel cars but I believe with my increased comp. ratio that it should be easier to run a mixed setup. I really don't know where to begin and I do not have scientific equipment available at my house for testing mixtures. I could probably get into the labs at college though even though I'm not a science major or w/e.

I'm just interested in running cheaper gas with the oil to keep the octane or combustion rating higher since of my comp ratio, and definitely saving the environment from harmful fumes at the same time. I'm not really interested in it for the money savings at the moment, so please don't knock me for that.

I'll talk to my environmental engineering professor today about it, see if she knows anything about non diesel biofuels.

you need a CR of 22:1 or higher to burn oil as a fuel in a diesel conversion scenario...which you do not have.

[Didderson]

thank you

you need a CR of 22:1 or higher to burn oil as a fuel in a diesel conversion scenario...which you do not have.

Ah that was probably easy to figure out, but thanks for the info cause I did not know!

I'll look into using E85 later on, thanks so much for the help, it seems really easy awesome!

Yeah and I plan on running an SAFC 2 even before converting it.

[Vinnito1]

FYI....E85 is acidic and will eat up a fuel system ( rubber and metal parts) not designed to run on E85. Plus the proper air/fuel ratio needed to burn E85 is different than gasoline

I don't know how long it would take before the corrosion starts to effect the fuel system

[Bigvinnie]

Use 91 Octane and mix with toluene, Toluene is found in most paint supply stores.13 gallons mixed to 1,1/3 gallon of toluene. That is the mix ratio for 93 octane, at a 9% mixture. Toluene is $15 cheaper than using octane boosters at car shops. Toluene should actually increase the flame front more than standard gas/octane rating. You can also use much less Toluene per mixture than you would if you made an Xylene mixture to the fuel you use.http://www.offroaders.com/tech/octane.h ... 95....html

I would also recommend TORCO fuel concentrate.

E85 is bad and corrosive to the aluminum manifold, and most parts that are made of aluminum. It also eats away at most of the seals on the KA engine.

QUOTE: Normal gasoline typically contain around 25-30% aromatics, primarily toulene and xylene. Adding more will simply increase the octane rating and bring their concentrations up to what you find in higher-octane European gas (40-45% aromatics): Gasoline composition.


Modified by Bigvinnie at 12:29 PM 11/11/2007

[Didderson]

I'm glad I checked this, thanks a bunch man. I took an auto body class a few summers ago and isn't the toluene a thinner for the clear coat mixture IIRC?

I'll have to check that out.

[Bigvinnie]

Yeah Toluene and Xylene are the 2 aromatics added to make higher octane rated fuels.The RdON of toluene is 114Octane=( 121RON+107MON)/2The RdON of xylene is 118 Octane=(119RON+117MON)/2Toluene from what I understand has a much broader range as far as it's Octane characteristics. Xylene can be more stable for a MON characteristic (high temperature and High rev).Our typical 91 RdON octane is 5% based Oxygenated (ethanol) Octane, and 25% Toluene and Xylene Octanes.

Basic equation for mixing these compounds for higher averaging octane.

(gallons of toluene or Xylene or both*RdON of Toulene and/or Xylene(114 or 118 or it's RdON of 116))+ (gallons of gasoline*RdON Octane of gasoline (91))/ total number of gallons to mixture=New RdON of gasoline mixture.Hope that makes sense.

Just to simplify

(G*RdON(Octane rating))+(G*(RdON Octane of fuel))/total amount of fuel= New RdON Octane rating