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Technical Running Temp for a .060 Bored 283

Discussion in 'The Hokey Ass Message Board' started by Hdonlybob, Mar 6, 2015.

  1. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 4,023


    OK OK I admit it, I have a severe case of cabin fever here in bear with me...
    I may have posted on this before, but would appreciate any help from someone running a similar set up to mine...
    I am (71) years old, so grew up with the old NOT HOT engine syndrome... :(
    Having said that I have the following in a '63 Biscayne 2 door...
    * 283 bored .060 over to 292
    * 305 HO heads
    * Melling L79 (old Corvette 350hp 327) type cam
    * Running I think advanced ~12 degrees (not positive on this)
    * Using radiator out of a 66 Chevy with a single electric fan (from Junkyard, not sure of cfm)
    * 2 1/2" Ram Horns and full 2 1/2" exhaust
    * Electronic ignition
    * Edelbrock Performer intake
    * Edelbrock 550 cfm carb
    Engine is fresh with ~9000 miles on it.
    I have a 180 degree thermostat in it, and during the cold weather it stays right at 180. (cold as in 40 degrees outside) Don't drive it in the winter, but did take it a out to change transmission a few weeks ago and went ~30 miles.
    Summer time when the outside temp is in the 90's on the road it will run up in the 190-195 range. Always will cool back down to ~185 or so when idling..
    Never boils over or comes out the overfill when shut off. I just being an a paranoid old fart ????
    I have another radiator from a 396 Chevy that I can install, plus was wondering if a dual electric fan would help..
    If I am going to make a change, I want to do it soon before the good weather hits...
    Any help from those of you actually running one like this would be appreciated, as well as obviously those of you who really know about this stuff...
    Thanks much, :)
    Joined: Jan 13, 2004
    Posts: 2,769


    I hope your cam is not + 12 degrees.Must mean timing? First where are you taking the temp from ?Heads tend to read hotter then intake manifold. If it cools down when stopped and idleing it is not an airflow problem. Actually if it doesn't get over 195 and your using the heads for the sending unit ,it probably isn't a problem. Just my opinion. My stuff runs 200 on occasion.
  3. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 4,023


    Yep Joe, I meant timing advanced ~12 degrees.
    I have two temp gauges .... one on the engine at the water pump return, and another at the rear of the right head.
    Also have used my "Red Dot" heat gun all over the areas when stopped so confident in my numbers....
    Thanks for your and answers.. :)
  4. draggin'GTO
    Joined: Jul 7, 2003
    Posts: 1,787


    Running 190 to 195 in 90 degree heat is perfect.

    Worry not.
    40fordtudor likes this.

  5. 3wLarry
    Joined: Mar 11, 2005
    Posts: 12,804

    Member Emeritus
    from Owasso, Ok

    yes, you are a paranoid old fart with a normal cooling system
    kidcampbell71 and 40fordtudor like this.
  6. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 4,023


    APPRECIATE !! Now if I can just get out in the shop tomorrow.. :) :) :)
  7. belair
    Joined: Jul 10, 2006
    Posts: 8,872


    I hate to agree with Larry, but what Larry said.
    3wLarry likes this.
  8. Lobucrod
    Joined: Mar 22, 2006
    Posts: 4,122

    Alliance Vendor
    from Texas

    my experience here in our Texas heat if that just an electric fan does not cut it. A good engine driven fan with a good shroud will out do any electric fan. With that said I wouldn't worry about running an engine at 195 as long as it stays there. If it keeps creeping up then you have a problem. I ran a SBC in my 38 Chevy with just an electric fan for a few years and had a nagging heating problem even with a good quality aluminum radiator. Replaced the SBC recently with a warmed over 409 and put a 6 blade stainless flex fan on it and took the time to build a good shroud. Now the 409 runs cooler than the 350 ever did.
  9. verde742
    Joined: Aug 11, 2010
    Posts: 5,809


    I had a 283 bored to 292, in SW Washington state and it ran HOT till the day I put a 327 in my 55 Chev.. I hated worrying about that darn Temp Gauge. I am 71 years old also.. not old FOR a rock, or a tree..
  10. sdluck
    Joined: Sep 19, 2006
    Posts: 2,935


    Do you have a vacuum advance? Is it hooked to manifold vacuum,
  11. Road Angels
    Joined: Mar 2, 2015
    Posts: 134

    Road Angels

    Do you have the electric fan in front or behind the radiator, in front blocks some of the cooling tubes, and makes for a hot spot where the fan hub is, behind is better if you have room, Dont use a flex fan, I had a blade fracture and exit thru the front sheet metal for the wheel well, you got a lot of over bore, so above 190 is a little hot not bad, these old blocks dont have the nickel content that the later blocks have that run 190- 200 all day long
  12. tubman
    Joined: May 16, 2007
    Posts: 6,114


    This. Also make sure you have the correct vacuum can and it is working correctly. Google "two inch rule" and look at the appropriate results. In the end though I don't think 195 is a problem either.
  13. volvobrynk
    Joined: Jan 30, 2011
    Posts: 3,587

    from Denmark

    Do you just wish you came up with it first?
    I know the feeling.

    But the part of it puking when shut of sound wrong, or is that just me?
  14. Gary Addcox
    Joined: Aug 28, 2009
    Posts: 2,472

    Gary Addcox

    For cooling a rod in Texas summers (lots of 100%+days), a fan on the water pump nearly as wide as your radiator AND a good shroud will do it.
  15. Gary Addcox
    Joined: Aug 28, 2009
    Posts: 2,472

    Gary Addcox

    I was always under the impression that a 0.60 over 283 was perfect. I guess the guys with them didn't want to admit they ran hot. One of the HAMBers implied that later 283 blocks may not run hot at .060 over. So, the later blocks are just better ? Guess I learned something else today.
  16. Hdonlybob
    Joined: Feb 1, 2005
    Posts: 4,023


    Not to confuse things, but should also clarify that with my gearing I am running close to ~3000 rpms at 60 mph.....
    I usually try to hold about 55 when cruising....nope don't do much interstate driving..
    I will be comfortable now with these temps, although I still will change to the 396 radiator. Only because I have it an it is a lot newer.... :)
  17. Your temps are fine when you start getting into the 210-215 range you should rethink it maybe and if you hit 225-235 it is time to get it to a hose and cool it (spray the radiator with the engine idling fast.)

    Anyway don't sweat it, they run best between 180 and 200. Water doesn't boil 'til 212 (actually 208 @ our altitude) of that helps.
  18. fridaynitedrags
    Joined: Apr 17, 2009
    Posts: 402


    195 is where it needs to run to boil off acids in the oil that form from blowby past the rings. (normal). I'll be 73 next month, so you're just a kid.

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