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  1. Thread: radiator design

    by Daves
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    310,706

    Sticky: You can assume it is higher than the actual work...

    You can assume it is higher than the actual work you are outputting to the crankshaft because some parts rob power (alternator & water pump). Therefore, you could probably estimate that the stock...
  2. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: For you metrically challenged (like me), that's...

    For you metrically challenged (like me), that's about 588 CFM (1000 m^3/h).
  3. Thread: radiator design

    by Daves
    Replies
    333
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    310,706

    Sticky: Can anyone confirm the following radiator...

    Can anyone confirm the following radiator temperature drop data? We saw a 9.6?F (5.3?C) average drop when coolant was flowing through the radiator. The peak temperature drop while coolant was...
  4. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Our rules state that about 66 mph is the top...

    Our rules state that about 66 mph is the top speed seen in the endurance event.
  5. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: We got our Perma-Cool 1650 CFM fan in today. The...

    We got our Perma-Cool 1650 CFM fan in today. The surprising part is that it covers 80% of our radiator with no shroud. Too bad it weighs 4 lbs.
  6. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Perhaps a copper radiator would not be much...

    Perhaps a copper radiator would not be much better. According to some websites, typically the tubes are made of brass, but the fins are made of copper. To join the two together, a lead solder is...
  7. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Switching to a copper/brass radiator may be an...

    Switching to a copper/brass radiator may be an option, but extensive testing would have to be done to show that it could cool the same amount as the aluminum radiator. For a good article about a...
  8. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky:

    <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>I can't see why it wouldn't chris... stock cbr600 f3 approx 110bhp, brunel racing restricted cbr600 f3 approx 70bhp, less power...
  9. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky:

    <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>this seems to suggest that the portion of work rejected as heat and usable power are equal, i.e. not heat is 1/3 of max...
  10. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Save the image to your computer, resize it, and...

    Save the image to your computer, resize it, and upload it to your website. Next, edit your post and replace the URL with the new ones.
  11. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Shroud or no shroud? Perma-Cool states,"All...

    Shroud or no shroud?

    Perma-Cool states,"All Perma-Cool electric fans are designed to be installed directly to the radiator core, close enough to not need a shroud." They also write, "A general...
  12. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky:

    <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>A project that can be started before the engine decisions are finalized is the cooling system: This is VERY important. The...
  13. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: _

    _
  14. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky:

    <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Engine heat rejection is about 1/3 max engine power (an approximate rule of thumb). -- Jonno <HR></BLOCKQUOTE>

    I agree with...
  15. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky:

    <BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>4. Determine fan size needed to reject maximum number - Matthew Robinson <HR></BLOCKQUOTE>

    How do you determine the fan...
  16. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Our water pump flow rate needs to be tested...

    Our water pump flow rate needs to be tested again. Our team did not test it right 2 years ago, so they did not get accurate results. I believe they tested it with no thermostat in the engine. Can...
  17. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Jonno, you're right. We did our testing with no...

    Jonno, you're right. We did our testing with no load on the engine, and our flow meter had too high of a pressure head loss to be accurate.
  18. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Aluminum tubing saves about 1 pound of weight per...

    Aluminum tubing saves about 1 pound of weight per foot compared to rubber hose.
  19. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Our testing used thermocouples in the water flow...

    Our testing used thermocouples in the water flow right before the exchanger and directly after the exchanger. We tested a set of dual exchangers from White Oak Radiator, and we tested a dual-pass...
  20. Thread: radiator design

    by Daves
    Replies
    333
    Views
    310,706

    Sticky: Through our worthless testing, we saw a max heat...

    Through our worthless testing, we saw a max heat dissipation of 72 kW through a single heat exchanger on a CBR600 F4i engine. This is useless because the engine was under no load.
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