Results 1 to 9 of 9
  1. #1
    Do you ever leave?
    Join Date
    Jan 2017
    Location
    Nth Qld
    Posts
    1,654

    Default Custom radiator ,features ,what to get /what not to get

    HI
    HQ-HZ sbc
    Double factory full size flanges for elec fan shroud and body mounting
    fan sender unit holes --located just above core not to high, top tank
    drain plug
    trans cooler

    small or large rad cap ???

    Can any one give me the dimensions of support panel radiator opening width and height ?????
    Hq have a very small radiator compared to almost all chevy vehicles ...

  2. #2
    Senior Member
    Join Date
    Nov 2018
    Location
    Sydney
    Posts
    710

    Default

    Don't be sucked into a double pass rad. And if it is going to see some rpm, switch to a cross flow if you can. More info: www.stewartcomponents.com

  3. #3
    Senior Member BasicQ's Avatar
    Join Date
    Apr 2020
    Location
    Geelong
    Posts
    528

    Default Custom radiator ,features ,what to get /what not to get

    If I were to remove my radiator the rectangular hole in the rad support panel it bolts over measures 695mm x 365mm

    I have an ADRAD std 3 core auto replacement copper brass HQ with sbc. Single 10” Davies Craig thermo in the middle. Wieand alloy street series water pump. 383 sbc with alloy heads. Simple or ‘Basic’ cooling system, never an overheating problem.


    Sent from my iPad using Tapatalk
    Last edited by BasicQ; 07-02-2021 at 07:47 PM.

  4. #4
    Do you ever leave?
    Join Date
    Jan 2017
    Location
    Nth Qld
    Posts
    1,654

    Default

    Hi
    GTO
    -been down the road of crossflow. In short works if the rad support was designed for it this includes electric fan fit up .Together with Lower bonnet lines and remote pressurised coolant reservoirs . As i`ve said Holden radiators are small and have little room to move . Basically an economy version of a chevy. Compared WB to HQ no real benefit.

    Basic
    holesize 695 ??? x 365
    Overall width of the alloy is 715mm
    Alloy core I am looking into is 622 W x 383H
    622mm is stock alloy core width
    360 is stock alloy core height ///increased for thermo fan shroud to 383mm ---fans are 350mm
    might increase width a little approx 20mm rubber mounts need to be considered

    thanks I have condensor and rad still installed ,hard to get access to measure

    Have to measure my factory copper 3 core as well , I need to get some interest again!!!
    Last edited by swampy; 07-02-2021 at 10:41 PM.

  5. #5
    Senior Member BasicQ's Avatar
    Join Date
    Apr 2020
    Location
    Geelong
    Posts
    528

    Default

    Yep, 695mm. See in pic below it’s not a true rectangular opening. Rad mount bolt top right.

    [img]https://i.ibb.co/QcQj3q1/B79451-F7-1-D1-A-4-DE8-B620-3-FFEA5-D2-C50-A.jpg[/img]


    Sent from my iPad using Tapatalk

  6. #6
    Senior Member
    Join Date
    Mar 2007
    Location
    Melbourne Australia
    Posts
    743

    Default

    overflow bung, consider location of where (if you plan to instal one) the catch can will go. Most places just put it in the side of the filler neck. The other thing I am planning to do on my next one is have a way to screw in a sacrificial anode. I have a pesky small electric draw I have not been able to find and it's slowly killing my radiator. I can't use an in cap one. But there are screw in ones. Just a thought.
    Chris

    68 Camaro 632 BBC Pro-touring

    Daily driver - 1961 Buick Bubbletop - not much horsepower, but smiles for miles

  7. #7
    Do you ever leave?
    Join Date
    Jan 2017
    Location
    Nth Qld
    Posts
    1,654

    Default

    hi
    Basic
    Pic confirms what I thought support panel is a weird shape . Some people do trim panel to get a larger rad installed . I will go to as large as possible within the factory mounts .
    Large wavy 2 x 1 1/4 tubes with R shaped heavy duty fins 16 FPI

    Any chance of measuring mount hole width side/side distance ?????

    Cluxford
    sender unit holes could double as anode
    electrical noise can indicate earth cable is needed fan shroud /rad body to body shell earth
    Over flow neck sorted drivers side
    Last edited by swampy; 08-02-2021 at 12:16 PM.

  8. #8
    Do you ever leave?
    Join Date
    Jul 2009
    Location
    Sometimes Melbourne
    Posts
    2,677

    Default

    Quote Originally Posted by cluxford View Post
    overflow bung, consider location of where (if you plan to instal one) the catch can will go. Most places just put it in the side of the filler neck. The other thing I am planning to do on my next one is have a way to screw in a sacrificial anode. I have a pesky small electric draw I have not been able to find and it's slowly killing my radiator. I can't use an in cap one. But there are screw in ones. Just a thought.
    Take a look at your coolant pH, aim for 7.0

  9. #9
    Do you ever leave?
    Join Date
    Jan 2017
    Location
    Nth Qld
    Posts
    1,654

    Default

    hi
    actual copper rad size

    Width Tot inclu. side brackets 708mm
    Height {NOt inclu. cap ] tank to tank 495mm

    core width 635mm
    core height 380mm

    Side Mount hole cen to cen 685mm
    inside side bracket to other inside brkt 645mm

    Many aftermarket rads are smaller so be-aware . The core drawing PWR supplied was smaller in some areas .

    Elec Fans are typically 350 x 350mm so core height is ok but width is still but with means a fan shroud is needed say 25-32mm wide min .[core is 635mm fans are 700mm so overlap of 65mm or 32.5 per side ]

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. radiator cap or radiator or thermostat problem?
    By benji_vq_hsv in forum Holden V8's
    Replies: 15
    Last Post: 06-05-2011, 08:38 PM
  2. Replies: 3
    Last Post: 01-04-2011, 11:27 AM
  3. Replies: 3
    Last Post: 01-11-2010, 10:03 AM
  4. VY SS Custom
    By sam in forum Photochops
    Replies: 14
    Last Post: 12-01-2009, 02:49 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •