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Thread: Small RSR fan on a street car?

  1. 12-01-2009, 06:36 PM #1
    Cornpanzer
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    Small RSR fan on a street car?

    So, what do you think? Could one get away with a 226mm "big pully" RSR fan on a street driven 2.8 with compression?

    Anyone ever used or seen these used?

    Thanks
    Renn-Spot - Cars & parts For Sale - http://renn-spot.blogspot.com/
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  2. 12-01-2009, 07:21 PM #2
    Mr9146
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    Sure. Just keep the Rs up.
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  3. 12-02-2009, 04:26 AM #3
    Cornpanzer
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    With all your blabbering otherwise and that is all you can give me?

    Seriously, did the blue car have a small fan? What did you use for a cooler?
    Renn-Spot - Cars & parts For Sale - http://renn-spot.blogspot.com/
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  4. 12-02-2009, 05:13 AM #4
    mike curnow
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    fan

    one of the turbos or SC uses a 225mm fan
    Mike
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  5. 12-02-2009, 06:07 AM #5
    tom1394racing
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    The 225mm fan was used on the 78/79 SC's and on the factory RSR.

    Here's a pic of an original factory 2.8 RSR with the RSR 225mm fan.

    Have more detailed pics if anyone is interested.
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  6. 12-02-2009, 06:12 AM #6
    Cornpanzer
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    the SC and turbo used a smaller pully diameter which increased the fan speed. Not the same
    Renn-Spot - Cars & parts For Sale - http://renn-spot.blogspot.com/
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  7. 12-02-2009, 07:17 AM #7
    Mr9146
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    It's like any underdrive pulley system, Dave.

    My fan on the blue car was a small fan with an early hub (notice in the photo the phillips head screws instead of rivets on the hub). With the high compression and state of tune that setup proved insufficient for normal street use. The oil temps weren't so much the problem; rather, it was the head temps...especially in traffic.

    The solution was to install a stock-hubbed 225 with a BIG bottom pulley to really pick up the fan speed; also pulled timing out of the motor, added more fuel and drove a gear down to ... are you ready for it? ... keep the Rs up.

    How's that for blabbering?
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  8. 12-02-2009, 07:21 AM #8
    Mr9146
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    The cooler was a brass-tube SC cooler, btw.
    -Marco
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  9. 12-02-2009, 08:29 AM #9
    boba
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    Marco,

    What fan shroud did you use? Did you run an engine mounted oil cooler?
    I think I can see the routing for the EM cooler in your photo.

    I think Dave has an original shroud which would not have provision for EM cooler.
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  10. 12-02-2009, 08:48 AM #10
    Bert
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    Interesting thread.

    Has anyone used the small RSR fan with dual front oil coolers or a center RS type oil cooler to keep the oil temps down?

    What about using a flat fan shroud (with no air duct) and remove the engine mounted oil cooler (keep the dual oil coolers in the front to compensate)? Would that setup reduce head temps in a meaningful way?
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