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Hot Rods 283 fuel needs

Discussion in 'The Hokey Ass Message Board' started by khead47, Jul 27, 2020.

  1. khead47
    Joined: Mar 29, 2010
    Posts: 1,709

    khead47
    ALLIANCE MEMBER

    Hey Hambers . I will finally be able to get to the DMV tomorrow to get my 47 Coupe legal. It has a stock 1966 283 2bbl. My fuel gage reads 3/4 full. PO said he used additives to the gas. I want to fill it up on the maiden voyage tomorrow. So, my question is should I be concerned with valve seat recession ? Marvel Mystery oil ? Or should I just drive it ? 20200601_181811(1) (1).jpeg
     
    Jalopy Joker likes this.
  2. olscrounger
    Joined: Feb 23, 2008
    Posts: 3,977

    olscrounger
    ALLIANCE MEMBER

    a little MM won't hurt--drive it!
     
    1oldtimer likes this.
  3. flatford39
    Joined: Dec 3, 2006
    Posts: 2,673

    flatford39
    Member

    Have you driven it anywhere?? I would at least do some laps around the neighborhood to shake it out prior to your drive to the dmv or did I not understand your question.
     
  4. anthony myrick
    Joined: Sep 4, 2009
    Posts: 6,151

    anthony myrick
    Member

    Drive it
    Put a million miles on non hardned seats.
    Put them in my last build but it’s a bus.
     

  5. khead47
    Joined: Mar 29, 2010
    Posts: 1,709

    khead47
    ALLIANCE MEMBER

    flatford39. Not taking the Coupe to the SOS. I will drive it around the neighborhood before any longer trips. My question is concerning many reports in the early 70s showing severe valve seat recession in engines with non hardened seats. The 283 in my car will be driven like the old man that I am. I have ran many pre 70s cars on no lead with no issues. 20200601_110752 (1).jpeg
     
    Jalopy Joker likes this.
  6. jimmy six
    Joined: Mar 21, 2006
    Posts: 7,115

    jimmy six
    Member

    I’ve put 10,000 miles on my y block 56 and for my peace of mind add 1oz of Marine Sta-bil with every tank and it has the original valve seats. There is a lot of info on the web and here on using today’s gasoline. Most recent I’ve read not to use any higher octane than needed.
     
  7. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 3,174

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN

    The likelihood of seeing any valve seat recession in your lifetime is remote. If you were doing high speed, heavy footed driving the recession could be more significant after many thousands of miles but for your driving schedule don't worry about it. Enjoy
     
    olscrounger likes this.
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 46,862

    squirrel
    Member

    Drive it. If it gives you problems, then do something about it. As they all say...you'll be fine.
     
  9. Ericnova72
    Joined: May 1, 2007
    Posts: 429

    Ericnova72
    Member

    Takes a lot of heat to cause seat and valve face wear and recession.... heavy loads, trailer towing, sustained high speed driving(high engine rpm 4000+ constant).
    Ordinary passenger car/ light duty truck use it is almost non-existent.
     
    Lloyd's paint & glass likes this.
  10. khead47
    Joined: Mar 29, 2010
    Posts: 1,709

    khead47
    ALLIANCE MEMBER

    Thanks all. That is what I thought. If it ain't broke........................
     
  11. SEAAIRE354
    Joined: Sep 7, 2015
    Posts: 190

    SEAAIRE354
    Member

    If the engine is is original from 66 the seats will be work hardened from the leaded fuel and as long as the guides aren’t worn and it’s tuned correctly you should have no problems. One of the problems is when guys grind the seats to much and make them to wide. And I’m with squirrel. Drive it and deal with it if there’s a problem. Then I would recommend hardened exhaust seats. And I have seen a lot of pounded out sunken seats and as said mostly heavy trucks or bad valve jobs.


    Sent from my iPad using The H.A.M.B. mobile app
     
  12. southcross2631
    Joined: Jan 20, 2013
    Posts: 3,997

    southcross2631
    Member

    Put some 87 octane in it and run it. Lots of stations are selling non ethanol gas here in tn.
    I don't know about up there.
     
  13. Belle53
    Joined: Aug 13, 2019
    Posts: 11

    Belle53

    don't worry about it , valve seat recession on a SBC is not a problem valve003.jpg
     
  14. 6sally6
    Joined: Feb 16, 2014
    Posts: 1,261

    6sally6
    Member

    X-2 ^^^^^^^^^^^^
    6sally6
     
  15. 4 pedals
    Joined: Oct 8, 2009
    Posts: 721

    4 pedals
    Member
    from Nor Cal

    Top off the tank with fresh gas and take it for a ride! By 66, the 283 was the low performance "dog" motor, don't need any additives, and if it wears the seats it will take thousands of miles. Run it and smile!

    Devin
     
  16. 1oldtimer
    Joined: Aug 21, 2003
    Posts: 7,589

    1oldtimer
    ALLIANCE MEMBER

    I use a little MMM, for me at least it aids keeping the fuel from turning (kind of like stabilizer, but smells better).
     

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