Engine Radiator for AC conversion

Discussion in 'Classic Mustang Specific Tech' started by COramprat, Jan 25, 2013.


  1. COramprat

    COramprat Drone Driver Mod Dude

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    Adding an AC on our 66. It has a straight 6/250ci swap that but we need to upgrade the radiator. Any suggestions?
  2. rbohm

    rbohm Founding Member

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    yep, use a good three core radiator designed for the six. virginia classic mustang as a few good ones to choose from. get the high efficiency model.
  3. COramprat

    COramprat Drone Driver Mod Dude

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    I found one at Summit...and a new low profile fan.
  4. rbohm

    rbohm Founding Member

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    that works also.:nice:
  5. COramprat

    COramprat Drone Driver Mod Dude

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    With a stock replacement that would limit me to a 15 inch fan. I'd like to get a 17 inch in there. What would be an alternative to get a 17 inch fan to fit?
  6. COramprat

    COramprat Drone Driver Mod Dude

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    I recently purchased a new radiator for my 66. I'm replacing the 2 core with a 3 core so of course it is a bit wider and lacks clearance for the fan as it sits. The fan has a spacer (not sure what size) but my question is can I remove the spacer and mount the fan to the pulley or does it have to mount to a spacer?
  7. Iamdiffrnt

    Iamdiffrnt Member

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    As long as the fan clears the belts, I don't see a problem bolting it directly to the water pump pulley. However, IIRC you only want 1 to 1.5 inch between the fan and the radiator, unless you are using a shroud. If you are using a shroud, then you want the fan approximately half in half out of it.
  8. rbohm

    rbohm Founding Member

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    you can remove the spacer, as long you have room between the fan and the belts, as indicated. you can also use a shorter spacer, or switch to an electric fan.
  9. COramprat

    COramprat Drone Driver Mod Dude

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    It couldn't be that simple. :confused:

    The fan won't clear the pulleys/belts mounted directly to the pump. So have to find a fan/spacer that clears the pulleys while still having enough room to mount the radiator. The old fan had a 1 1/4" spacer riveted to it and put the blades about an inch from the radiator so that is too much for the new 3 core. I cant go with anything bigger than 15 inch on the fan due to the lack of clearance with the outlet on the radiator. I need to come off the water pump about an inch to clear the belts but I only have about 2 1/4 inch to work with between the fan and the radiator. It's turned into a geometry/trigonometry problem. :crazy:

    I ordered a 1 inch spacer and a low profile 5 blade fan from Speedway Motors. I'll let you know how it turns out.
  10. COramprat

    COramprat Drone Driver Mod Dude

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    Well the one inch spacer would have been find had I realized the pilot shaft on the water pump was 3/4". The spacer I ordered has 5/8". Luckily there is a performance shop about 40 minutes away that had what I needed and it worked great. The temps have come down quite a bit while driving but it still heats up at idle. I forgot to make sure the system was full so I filled it this morning. I have to take another drive to see if that took care of it. It's raining right now so it'll have to wait.

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  11. COramprat

    COramprat Drone Driver Mod Dude

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    Still over heating at idle but...only on the gauge. I guess I need to get the actual temp to see how hot it is getting. It hasn't coughed up any coolant yet but I hope when I get a shroud on there it will cool it off.
  12. rbohm

    rbohm Founding Member

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    maybe the car is looking at the girl in your avatar and getting a fever?:p:D
    COramprat likes this.
  13. Walter Sparks

    Walter Sparks Member

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    Yea, I come to muscle car forums to escape the naked girl world we live in.. LOL you dragging the devil in here.
    You should get a shroud or switch to an electric fan.
    I would also recommend to try removing the t-stat during the summer months and going with a high flow 160 degree stat the rest of the year. I was having problems with heat at idle and removed my tstat..problem solved. get an avatar of your car and stop the lust.
  14. COramprat

    COramprat Drone Driver Mod Dude

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    I can't seem to get rid of her. Being a Tiger fan and all. :)

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