Results 1 to 17 of 17

Thread: Denatured Alcohol?

  1. #1
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default Denatured Alcohol?

    Anyone use this in your gas tank to help pass "difficult" emissions? Supposedly the ratio is 1 part denatured alcohol to 4 parts 87 octane. And you need to run the tank down to almost empty, add a gallon of alcohol and 4 gallons of 87 on the same day of the smog test. After the test, fill the tank with high octane to dilute the alcohol. This is supposed to be for the older high mileage engines like mine. I have til the first week of June to get my 77 smogged so I may try it.

  2. #2
    HLS30A 17574 djwarner's Avatar
    Member ID
    CZCC-27817
    Join Date
    Aug 2012
    Location
    Central FLorida
    Posts
    405

    Default

    what % of alcohol? 70% and 90% are available at the drug store, have no idea where to buy 100%.
    1971 240Z HLS30A 17574 L24-021025

  3. #3
    No more body roll! SteveJ's Avatar
    Member ID
    CZCC-5413
    Join Date
    Dec 2003
    Location
    Gainesville, GA
    Age
    54
    Posts
    3,651

    Default

    That's about 22% ethanol. Have you run a pre-test to see what your actual emissions are? The real fix may not be that difficult and probably won't put your fuel system at risk.
    73 240Z
    74 260Z

    Blue's collection of tech tips - A great place to look for answers
    XenonS30 -The cheap source for FSMs
    Georgia Z Club
    Fiddling with Z Cars - Z car tips & tricks and pictures of my car-loving life.
    Steve's CARtography - Just car pictures.

  4. #4
    Low Budget/High Value
    Member ID
    CZCC-20342
    Join Date
    Oct 2009
    Location
    Washington County, OR
    Posts
    3,629

    Default

    You might already be running 10% or more ethanol, from the pump.

    Denatured alcohol is just ethanol with impurities left in or added, so that you can't drink it. Benzene or some small amount of chemicals used during purification are typical.
    1976 280Z, with some minor modifications

  5. #5
    No more body roll! SteveJ's Avatar
    Member ID
    CZCC-5413
    Join Date
    Dec 2003
    Location
    Gainesville, GA
    Age
    54
    Posts
    3,651

    Default

    Quote Originally Posted by djwarner View Post
    what % of alcohol? 70% and 90% are available at the drug store, have no idea where to buy 100%.
    Denatured alcohol is 100% ethanol, just with trace amounts of chemicals to render it non-potable. It is available at hardware stores. You could also get pure grain alcohol from the liquor store, but that's pretty expensive to run.
    73 240Z
    74 260Z

    Blue's collection of tech tips - A great place to look for answers
    XenonS30 -The cheap source for FSMs
    Georgia Z Club
    Fiddling with Z Cars - Z car tips & tricks and pictures of my car-loving life.
    Steve's CARtography - Just car pictures.

  6. #6
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    I have not done a pre-test but have considered it. The problem here is you are not allowed any adjusting during the pre test. So I would still not know if any adjustments I do to it will make it pass until I take it back. That could become a PITA you know?

    dj, I believe it is 90% alcohol.

  7. #7
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    Yeah but I could drink the left overs SteveJ

    The pure grain alcohol that is
    Last edited by rcb280z; 05-18-2014 at 07:31 PM.

  8. #8
    No more body roll! SteveJ's Avatar
    Member ID
    CZCC-5413
    Join Date
    Dec 2003
    Location
    Gainesville, GA
    Age
    54
    Posts
    3,651

    Default

    Consider what you are doing with EtOH. You are adding extra oxygen into the combustion process. If you're high on CO, that might help. If you're high on NOx, it won't. If you're high on HC, I would think it would increase your CO.
    73 240Z
    74 260Z

    Blue's collection of tech tips - A great place to look for answers
    XenonS30 -The cheap source for FSMs
    Georgia Z Club
    Fiddling with Z Cars - Z car tips & tricks and pictures of my car-loving life.
    Steve's CARtography - Just car pictures.

  9. #9
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    Yeah, Im thinking I will run hotter than normal. So Im not convinced the alcohol is the answer.

  10. #10
    Low Budget/High Value
    Member ID
    CZCC-20342
    Join Date
    Oct 2009
    Location
    Washington County, OR
    Posts
    3,629

    Default

    I've found that setting everything to stock specs., timing mostly, and running the idle air screw out as far as you can without inducing a miss, will get me through the Oregon DEQ tests. Timing advance and retard changes the ratio of combustion byproducts that they test for. It's probably why idle has a whole set of parameters tied to it, like initial timing, idle enrichment fuel, idle air bypass, etc. Air fuel ratio and timing both change immediately as soon as you open the throttle.
    1976 280Z, with some minor modifications

  11. #11
    Walmart greeter Mikes Z car's Avatar
    Member ID
    CZCC-18366
    Join Date
    Dec 2008
    Location
    Idaho
    Posts
    1,041

    Default

    When I lived in California I used "guaranteed to pass" which sometimes seemed to help. I never knew what was in the stuff (and never tried to drink it).

  12. #12
    Registered User siteunseen's Avatar
    Member ID
    CZCC-24724
    Join Date
    Jul 2011
    Location
    Alabama
    Posts
    1,967
    1972 240Z #918 New Sight Orange
    1977 280Z #305 Light Blue Metallic
    1972 240Z #110 Persimmons Red

  13. #13
    Registered User Kurbycar32's Avatar
    Member ID
    CZCC-23586
    Join Date
    Feb 2011
    Location
    Manteca, CA
    Posts
    337

    Default

    so the deal with the alcohol is to "clean out" the exhaust and catalytic converter system BEFORE you take a smog test. The theory is that by adding alcohol you increase exhaust temps enough to "burn off" gunk and old carbon clogging up your cat and head. After that you take your car over with top tier gas and hopefully pas smog under normal conditions. Im pretty certain that you wont pass a smog test running alcohol in your tank. Does it work? The theory sounds good but I dont know anyone thats actually done it and you risk actually melting down the cat into a solid exhaust block. Your best bet is to first make sure the car is set to exactly what it came from at the factory including timing (make sure your timing mark is visible) and a full tune up, use the best gas you can find (chevron) get the car completely hot and immediately pre-test it. If you fail a pretest find out exactly why and correct the problem for real. If you need a magical emissions test fluid your car probably isn't running correctly anyway
    Early 1974 260z
    https://sites.google.com/a/thecomputerrehab.com/260z/

  14. #14
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    Yeah I get that the car has to adjusted right also but like I said above "high mileage" engines is why the alcohol peaked my interest.
    Last edited by rcb280z; 05-19-2014 at 04:37 PM.

  15. #15
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    Siteunseen and Mikes Z Car, I have been looking at this product also. I want to look at some reviews also.

  16. #16
    HLS30A 17574 djwarner's Avatar
    Member ID
    CZCC-27817
    Join Date
    Aug 2012
    Location
    Central FLorida
    Posts
    405

    Default

    Out of curiosity, is E85 available in the Peoples Republic of California?
    1971 240Z HLS30A 17574 L24-021025

  17. #17
    Registered User rcb280z's Avatar
    Member ID
    CZCC-21454
    Join Date
    Apr 2010
    Location
    Ventura Ca.
    Age
    58
    Posts
    873

    Default

    Not around here where I am. I see all these flex fuel vehicles but I dont ever see any pumps.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 8
    Last Post: 03-11-2012, 02:30 AM
  2. Alcohol or paint thinner?
    By MikeZcar in forum Misc (S30)
    Replies: 5
    Last Post: 04-25-2008, 11:10 AM
  3. Powdered alcohol?
    By Mat M in forum Open Discussions
    Replies: 8
    Last Post: 06-08-2007, 11:28 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •