Cooling fan and radiator questions

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    Author Topic: Cooling fan and radiator questions  (Read 2315 times)

    Offline widing'cuda

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    Cooling fan and radiator questions
    « on: April 19, 2007 - 09:54:44 AM »
    I just added a fan shroud and found out it didn't fit the fan (Fan shroud from Mopar Performance), I'm missing about 0.2 cm for it to clear. My 'cuda is a 383 4bbl/HP A/C car with a 26" Radiator part No. 2998 908. Don't know the fan clutch part No. is. But the Fan has 5 blades and it's part No is 4140 063. I thought all big block had a 7 bladed fan. And not a 5 blades fan. Or am I wrong?
    « Last Edit: April 19, 2007 - 10:57:10 AM by widing'cuda »
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    - Jørgen - Norwegian Mopar fanatic

    1970 Plymouth 'Cuda 383 A833 8-3/4 3.23 suregrip
    http://cuda.widing.biz/


    Offline MEK-Dangerfield

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    Re: Cooling fan and radiator questions
    « Reply #1 on: April 19, 2007 - 02:50:45 PM »
    To confuse you even more, my 440 has a six blade fan with a 26" radiator. Sorry I can't help out here.


      Mike
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    Mike

    1970 Challenger - SOLD
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    Offline widing'cuda

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    Re: Cooling fan and radiator questions
    « Reply #2 on: April 26, 2007 - 12:56:56 PM »
    My 'cuda does not have the original engine. But it is a 70 383.

    Here's a picture of the fan. I thinking of getting a 7 blade fan as it will cool the engine more.
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    - Jørgen - Norwegian Mopar fanatic

    1970 Plymouth 'Cuda 383 A833 8-3/4 3.23 suregrip
    http://cuda.widing.biz/

    Offline MEK-Dangerfield

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    Re: Cooling fan and radiator questions
    « Reply #3 on: April 26, 2007 - 03:21:02 PM »
    Quote from: widing'cuda on April 26, 2007 - 12:56:56 PM
    My 'cuda does not have the original engine. But it is a 70 383.

    Here's a picture of the fan. I thinking of getting a 7 blade fan as it will cool the engine more.

    Yes, a seven blade fan will cool the engine more, the trade-off is a little loss in horse power, as the seven blade fan takes a little more Ooomph to turn. If you don't run hot, I'm not sure I would mess with it. Just my thoughts.  :2cents:


      Mike
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline rich

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    Re: Cooling fan and radiator questions
    « Reply #4 on: April 27, 2007 - 05:29:01 AM »
    Hey Widing,

    I bought the fan for the 'cuda about a year before you owned the car; it originally had a terrible aluminum fan which did nothing. This fan has always cooled the 'cuda really well; even when we took it to Le Mans and were stuck in traffic in 30 degree C heat. If you're concerned about the cooling, I don't think it's an issue but of course if you want it to look stock, then maybe you'd need to replace the fan.

    Rich
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    Offline widing'cuda

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    Re: Cooling fan and radiator questions
    « Reply #5 on: April 27, 2007 - 12:33:51 PM »
    Hey Rich, how are you?

    Well I have some cooling problems. So I'm going to add the 7 blade fan. When I was in queue the car started to overheat, so I had to drive in the bus lane to cool the engine.
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    - Jørgen - Norwegian Mopar fanatic

    1970 Plymouth 'Cuda 383 A833 8-3/4 3.23 suregrip
    http://cuda.widing.biz/

    Offline Mopar73340

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    Re: Cooling fan and radiator questions
    « Reply #6 on: April 27, 2007 - 01:04:06 PM »
    If you go with the 7 blade fan be sure to get the heavy duty clutch unit to go with it. The standard clutch won't spin the 7 blade fan fast enough to work correctly. Been there!!   Just my  :2cents:
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    Offline ted

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    Re: Cooling fan and radiator questions
    « Reply #7 on: April 27, 2007 - 04:38:34 PM »
    THAT 5 blade fan  is most likely   the one that MP sells.
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    74 cuda, 70 challenger r/t

    Offline ntstlgl1970

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    Re: Cooling fan and radiator questions
    « Reply #8 on: April 27, 2007 - 04:51:52 PM »
    I agree with Ted, I bought my fan and clutch from MP and it looks exactly the same (5 blade) as yours.
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....

    Offline rich

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    Re: Cooling fan and radiator questions
    « Reply #9 on: April 27, 2007 - 05:00:26 PM »
    Yes, it is a Mopar Performance fan.
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    Offline widing'cuda

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    Re: Cooling fan and radiator questions
    « Reply #10 on: April 28, 2007 - 02:16:27 AM »
    Quote from: Mopar73340 on April 27, 2007 - 01:04:06 PM
    If you go with the 7 blade fan be sure to get the heavy duty clutch unit to go with it. The standard clutch won't spin the 7 blade fan fast enough to work correctly. Been there!!   Just my  :2cents:

    Thanks I'll keep that in mind
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    - Jørgen - Norwegian Mopar fanatic

    1970 Plymouth 'Cuda 383 A833 8-3/4 3.23 suregrip
    http://cuda.widing.biz/

    Offline widing'cuda

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    Re: Cooling fan and radiator questions
    « Reply #11 on: April 28, 2007 - 02:17:52 AM »
    Quote from: rich on April 27, 2007 - 05:00:26 PM
    Yes, it is a Mopar Performance fan.

    Ok, is fan clutch as well Mopar Performance?
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    - Jørgen - Norwegian Mopar fanatic

    1970 Plymouth 'Cuda 383 A833 8-3/4 3.23 suregrip
    http://cuda.widing.biz/

    Offline ntstlgl1970

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    Re: Cooling fan and radiator questions
    « Reply #12 on: April 28, 2007 - 06:41:21 PM »
    If it's the M/P clutch, mine doesn't seem to ever lock the fan clutch until the temp gets to 200 or so. Once it does "lock up" it definitely moves some air even with the 5 bladed fan. You could get a fan clutch from a parts store like autozone or kragen for a early (70's) pickup and try that. The clutch on my 73 D200 locked up at about 175 or so, think I paid about35 -40 bucks for  mine.
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....
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