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    Results 1 to 11 of 11
    1. #1
      Join Date
      Jul 2002
      Location
      Mesquite, TX
      Posts
      4,936
      Country Flag: United States

      LS swap - using original radiator

      I have been trying to use as much as possible from the 4th gen donor car, but I've come to the radiator and it just seems tiny (and it'd require extra fabrication to mount, and and and).

      Is there any technical reason I can't just use the old 69 El Camino radiator instead? I'd have to hook in the steam lines somewhere and it'd move me from a closed system to a not-closed system (which is fine by me), are there other reasons to move to the Camaro setup?

      (yeah, I'm sure this question has been asked before - or similar - but I didn't find it)



    2. #2
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,144
      Country Flag: United States
      How much horsepower does your LS produce relative to the original engine? I would get a nice aluminum radiator with two rows of 1” or larger tubes, especially if the original is an old brass core radiator with small tubes.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    3. #3
      Join Date
      Jul 2002
      Location
      Mesquite, TX
      Posts
      4,936
      Country Flag: United States
      400ish, give or take? Not an extreme build, cam/mild port/headers only.

      I don't think there's budget for new radiator; choices are the 69 small block radiator (which probably is a brass core, it's at least 30 years old) or the LS radiator from the donor Camaro.

    4. #4
      Join Date
      Aug 2004
      Location
      Jacksonville, FL
      Posts
      1,624
      Country Flag: United States
      If the budget doesn’t allow it for now, I would just make some brackets and use the donor radiator and fans over using the stock 30 year old radiator.
      Chris
      1968 Chevy Camaro SS
      LS3/T56 DSE suspension


    5. #5
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,144
      Country Flag: United States
      The stock radiator is not going to cut it imho.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    6. #6
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,144
      Country Flag: United States
      Cold Case has some reasonably priced aluminum radiators with twin 1.25” tubes.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    7. #7
      Join Date
      Jul 2002
      Location
      Mesquite, TX
      Posts
      4,936
      Country Flag: United States
      So the issue with the stock 69 radiator is just efficiency - that it couldn't hack the cooling requirements?

    8. #8
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,144
      Country Flag: United States
      Quote Originally Posted by derekf View Post
      So the issue with the stock 69 radiator is just efficiency - that it couldn't hack the cooling requirements?
      Yep. Not even close imho.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    9. #9
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,973
      Country Flag: United States
      I used a universal aluminum radiator from Speedway for my Cougar build. I bet you can find one that is close to the Chevelle radiator dimensions.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    10. #10
      Join Date
      Jul 2002
      Location
      Mesquite, TX
      Posts
      4,936
      Country Flag: United States
      It appears that the donor radiator is damaged and unusable.

      Given a limited budget, is there a technical reason to go with the LS-style closed system with the external reservoir rather than the A-body style?

    11. #11
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,973
      Country Flag: United States
      No reason at all. I have used a c4 Corvette radiator in the past on my RX7. Works awesome, even with the limited airflow of a second gen rx7.
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her