160 Thermostat?

Discussion in 'Camaro Questions' started by Dees73, Nov 29, 2016.

  1. Dees73

    Dees73 New Member

    Nov 29, 2016
    Southern Oregon
    So I recently just had my 73 split bumper in the shop and had a complete engine rebuild (SBC 400 2 bolt main 509 block .40 over.) and its currently making 475hp and 495Tq. I have a 3 core aluminum radiator and I was told to buy a 180 thermostat but ended up buy one rated 160 degrees instead. I had the engine professionally rebuilt and was told that the 160 would be fine but I've been reading some forms where people are saying it's not very good to have a 160 due to running too cold. So my question is, is this a good idea or would it be wiser to go with the 180 instead?
  2. 80sz

    80sz Veteran Member

    Feb 2, 2014
    Yikes the 160 degree thermostat debate! You will be scorned for such a calamity. It's 180 or nothing here. 160 is fine,I wouldn't want it for the winter which you won't be driving.
  3. Gary S

    Gary S Administrator Lifetime Gold Member

    Apr 14, 1999
    Bismarck, North Dakota
    Either one should work in the summer. The 160 isn't a good thing in cooler weather as it keeps the engine colder which it doesn't need. Running colder doesn't harm the engine, but it doesn't help it either.
  4. COPO

    COPO Veteran Member Lifetime Gold Member

    Sep 15, 1999
    Ontario, Canada
    You need a 180. The 160 will do more harm than good.
  5. Dees73

    Dees73 New Member

    Nov 29, 2016
    Southern Oregon
    Well I ended up buying another thermostat. This time the 180. The 160 was already installed but it was a quick swap. Maybe now it'll be ok to drive it in this 50 degree weather.
  6. RS1979

    RS1979 Veteran Member Lifetime Gold Member

    Jun 18, 2013
    Memphis, TN
  7. Zspoiler

    Zspoiler Veteran Member

    May 6, 2012
    Federal Way, Washington
    Small blocks generally run better around 180 Degrees.Even Supercharges ones.

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