Hello All!
Have a question about using alcohol to pass emissions. What octane fuel to use? How much alcohol to fuel ratio? Will that old trick work on an eng with no emissions equipment on it? I have a built 383 w/30 lb injectors. What should fuel pressure be to pass sniffer test.freind of mine said he just turned his fuel pressure down before test &he passed!
Any advise friends?

 

One of the smog guys I have used for years says "top tier" (Costco, Chevron, Shell most name brands) run cleaner. He also like 91 octane.

I once told him "I added a couple bottles of "Heet" and he said "it might help".

One of my vehicles, stock well mintained, high miles!, struggles to pass every 2 years. I got my lowest reading w/ 2 bottles of Heet in a in a fuel tank only holding maybe 7 gallons gasoline.

I also find retarding the timing (Ca allows 2 degrees ).

I clean the intake w/ Seafom, then remove the plugs, adding 2oz. Seafoam to each cylinder and allow overnight sit. I then crank it over(to blow out any Seafoam) and install new or cleaned/gapped plugs and drive it till the smoke disapates. I then change the oil and filter.

Good luck!

 

PS "HEET" gas line dryer, is Isapropal Alcohol without the 10-30% water of rubbing alcohol.

 

I tried a 3/4 tank of E85 but still failed NOx in Ca. But the NOx did come down. Maybe run a couple of tanks of E85 would flush out more of the regular/premium blend fuel.

Good luck.

 

I don't have to worry about emissions here but a few things I know "should" work.

Put about a quart/liter of methanol into a full tank of gasoline. As already mentioned, a higher octane will probably lower emissions since there is less chance of detonation.

Depending on how your local emission testing is done, make sure the engine is hot just before it's tested. Install a 195* thermostat if you have to. Hot engines don't pollute as mush as a colder running engine.

A tune up or at least some new spark plugs.

 

I thought heet was methanol.
Methanol is CH4O, Ethanol is C2H6O

 

Where both right!

I have yellow bottle HEET which is Isapropal (SP) and red bottle HEET which, I now see is Methal alcohol. Both say "Gas Line Dryer Antifreeze" on the bottle. I used the isapropal.

 

Methanol is also know as wood alcohol and methyl hydrate. You can pick some up at Home Depot if you have to.

Methanol, ethanol, isopropanol are all different types of alcohol and all burn differently with different BTU and air/fuel ratios.

My race car uses methanol for fuel. For a comparison, using methanol, you'll use twice as much fuel as gasoline and the fuel system needs to be designed to handle the extra fuel required but for a race fuel it's less than half the cost of race gas plus has many other benefits.

Straight ethanol is a drinking alcohol and is under government regulations. Pump gas can have up to 10-15% ethanol and E85 is 85% ethanol (but not 100% of the time). Putting E85 into a car not designed for it probably won't run very well.

Isopropanol doesn't make a good race fuel but can disperse water from gasoline in the winter to keep it from freezing.

 

In CA for years we used our own mixes of xylene and toluene. One of them will leave a combustion chamber residue with allot of use, the other won't. Can't remember which. Help with emissions tests and also home brew octane boost.

Your local sherwin-williams store will sell you large bottles of good pure stuff.

I clean my engine with a spray bottle and lots of water down it's throat.

 

I remember way back guys running their fuel way down then adding a gallon or two of Coleman fuel. That stuff burns real hot.

 

I would NOT recommend putting naphtha into a gas tank.

 

If you are looking to make homemade naplam, it's a good idea. If you don't want a raging inferno, you probably shouldn't.

 

At the time I was selling auto parts. We made a killing on that deal. That was in Minnesota back in the early 90's. Some people did real desperate things to get the cars to pass.
I also remember using Coleman fuel instead of charcoal lighter fluid for the grill. Holy crap did that thing blow....
Seems to be there were other alcohol products involved too.

 

Isn't naphtha "Lighter Fluid" like Ronson and Zippo lighters?

 

Naphtha, lighter fluid, white gas, Coleman fuel is all the same thing. It's a kerosene based fuel. Not designed for internal combustion engines.

 

Does anyone know what fuel pressure to turn it down to? I'm running 30 lb injectors &no smog stuff!

 

So do I use the yellow Heet or the Red, Heet? I have 93 octane mixed with 100 octane race fuel. I have a lil less than a half tank. So how much of Wichita Heet do I use, cause they come in 12 Oz bottles!?

 

Use the yellow