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Technical How wrong is it to mount the rad in front of the core support?

Discussion in 'Traditional Hot Rods' started by samdjr74, Dec 11, 2019.

  1. southcross2631
    Joined: Jan 20, 2013
    Posts: 4,329


    Helped build a VW camper with a Olds Toranado engine and transaxle in the back and cooled with a flat mounted radiator in the back. The radiator doesn't care where it's mounted Just needs airflow.
  2. Its no big deal. Just make sure that the rad seals more or less to the core support so that the air has to go through the radiator and not around it.

    People have been moving the radiator for more decades than I have been building cars. Hell in the '70s when I stuff a high torque 292 in my 41 Chevy I have to move the radiator for clearance. I never looked back, it worked and I was happy
  3. Due to the fact the Ranch Wagon was originally equipped with a inline 6 it was necessary to flip theradiator core around to gain valuable space for the 302 V8, your right it doesn't car which way it is mounted. HRP
    LOU WELLS likes this.
  4. I am wracking my brain here to remember which one it was. GM built one that the rad was in front of the core for the bigger engine and behind the core for the smaller motor.
  5. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,260


    Tri 5 Chevy six cylinder radiators are aft of the core support and V8 radiators are forward of the core support.
  6. We moved the radiator forward in a '54 Chev and had to trim the air deflector inside the hood to clear the top tank. Maybe something to check if you move it up. Never thought of it until the hood didn't shut.
    Early Ironman likes this.
  7. I guess I’m still confused why you feel like you need an electric said it overheated, you also said the rad was plugged/no good? Put a new rad in the stock spot, with the stock fan and drive happily ever after.

    All to often people want to re engineer a system that needs a simple repair.

    Sent from my iPhone using H.A.M.B.
    kevinrevin likes this.
  8. LM14
    Joined: Dec 18, 2009
    Posts: 1,937

    from Iowa

    Exactly backwards.
    rockable and arkiehotrods like this.
  9. Charlie K
    Joined: Nov 28, 2016
    Posts: 34

    Charlie K

    1955 Chevy, V8 was shorter than inline 6. Back in the day I had an original Bel Air V8 and the radiator was mounted toward the engine bay. Also had a original 6 cylinder business coupe that we converted to a Modified Production race car where the radiator was mounted in front of the support toward the grill. Kept the 6 cylinder radiator location when we installed the V8 race motor and had no heating issues. Of course we only ran it 1/4 mile and return. Lol

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    Last edited: Dec 13, 2019
  10. 6sally6
    Joined: Feb 16, 2014
    Posts: 1,407


    Man!!! You're not REALLY gonna put the radiator in FRONT of the rad support are you?!:eek: You can't be serious. That ranks right up there with kicking cats and stomping little dogs!!:confused: That would be soooo worng! Man please....think of your soul!!
  11. rocknwrench
    Joined: Sep 24, 2017
    Posts: 28


    ok...gonna make myself unpopular with the "traditional" guys. engine driven fans are extremely G.D. dangerous. there were 3 or more ford techs killed by em in the late 70s when there was a bad batch. and those werent ripped off a 65 year old car , and then run hoodless at a rod run with people walking by. sometimes "tradition" needs to yield to common sense, but as we all know, thats becoming less common. same guys feel that weather checked 40 year old bias plies are the bees knees.
  12. Oh good god........give me a fucking break....

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    Alaska Jim, kevinrevin, LM14 and 2 others like this.
  13. Hombre
    Joined: Aug 22, 2008
    Posts: 1,048


    Man you can say that again. Listen I don't know why he is even asking for advice, he seems to already know all there is to know!
    firstinsteele likes this.
  14. It was mostly referencing this. Mostly.

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  15. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 3,986

    Lloyd's paint & glass

    It breaks my soul to see a cool ass car cruising by me just to hear an electric fan kick on.... personally i feel like an electric fan fastened to a radiator restricts air flow at speed...
    Alaska Jim likes this.
  16. You got it backwards. the longer six cyl engines got the radiator placed ahead of the core support. the shorter tri five chevy V8 got the radiator placed behind the core support.
  17. Gman0046
    Joined: Jul 24, 2005
    Posts: 6,260


    Old Wolf, my bad. Posted it backwards.
  18. rockable
    Joined: Dec 21, 2009
    Posts: 3,288


    An electric fan is a better solution for most cooling problems because:

    1. The mechanical fan doesn't move enough air when idling, especially with the additional heat load of an A.C. condenser.
    2. It does move air at higher rpm, but when youre going 35 mph or more, you don't need it. Ram air moves air through the radiator just fine unless you've got a restriction. You are just wasting power turning a fan at this point. (i.e poorer gas mileage)
    3. An electric fan moves max airflow regardless of engine rpm and cuts off when you are moving enough ram air not to need it. (Think about traffic delays due to road construction, etc.) You will get better overall cooling and gas mileage with an electric fan.

    Yes , it's not "traditional" but advances in engineering have made it a better alternative, especially when space between the water pump pulley and radiator are at a premium. I have both and i have had no problems with my electric fans.
  19. Lloyd's paint & glass
    Joined: Nov 16, 2019
    Posts: 3,986

    Lloyd's paint & glass

    It's my experience that if I'm finding myself trying to put more air through the radiator to correct overheating, it's not an airflow issue. The radiator isn't sufficient for what I'm trying to do. i.e. the radiator holds 2 gallons, block holds 3, making the exchange non efficient. Radiators aren't created equal.
    Hombre likes this.
  20. gene-koning
    Joined: Oct 28, 2016
    Posts: 2,299


    WOW! All of this because the guy asked about moving the radiator out in front of the support? I've run electric fans before. One advantage of an electric fan is that it can be set to come on and turn off at preset temperatures, and the fan will only run within those perimeters, if it was set up properly. They work most efficiently at low vehicle speed, and engine rpm doesn't have any effect on how effectuate the electric fan is. The chances of an electric fan running while the car is a highway speeds is probably not very high, but if the fan does run at highway speeds, that probably means the motor is hot and some thing needs to be done.

    The engine driven fan turns faster as the engine rpm increases, and slows down when the engine rpm slows down. Often that is just about backwards to what the motor needs to meet its cooling needs. Up until the last 30 years, the car builders have not had a reliable method of running an electric fan, but they have had years of practice making engine driven fans do the job most of the time ( sometimes just barely) because there were few other options. Fortunately, we are no longer bound by the inefficient engine driven fans, unless of course your bound to the old traditions. Gene
    slim38 likes this.
  21. jimmy six
    Joined: Mar 21, 2006
    Posts: 8,544

    jimmy six

    As a side note some 50’s cars came with a lightweight metal shield and rubber seal above the radiator to the hood to force a lot more grille air thru the radiator. My 56 Ford “could” have had one depending on what part of the county it was used. They also had a half dozen water pump pulleys. Mine did not have the shield but does now and a smaller pulley. No coolant temp problems now.
  22. birdman1
    Joined: Dec 6, 2012
    Posts: 1,115


    I think we need a electric fan to blow some of the hot air away from the hamb members Lol
    0NE BAD 51 MERC likes this.
  23. birdman1
    Joined: Dec 6, 2012
    Posts: 1,115


    My 1958 t-bird had a 4 blade fan, no shroud. Sitting in 90 degree traffic it would get hot, so I just tried up the motor and the temp came down.
  24. wvenfield
    Joined: Nov 23, 2006
    Posts: 5,227


    I think this question has been answered.
  25. The Indian
    Joined: Oct 8, 2009
    Posts: 47

    The Indian
    from oklahoma

    I did it in my 55 Chevy truck when it had the inline 6 in it. Had the engine been properly mounted I'd have never moved it. Swapping in a SBC right now and I'll probably leave it where it is just for a little extra clearance. I drilled the spot welds at the top of the core support, separated the sheet metal from the upper part of the core support, then slid the radiator in from the top. Bought me about 1/2-3/4". I didnt need a lot of room. I did have to trim the mounts on the radiator itself. If I had moved it completely in front of the core support, it would've added a lot of work.

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