Electric fan for cooling? |
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Electric fan for cooling? |
teamgravy |
Jan 20 2013, 04:38 PM
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#1
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Newbie Group: Members Posts: 17 Joined: 9-November 12 From: Austin Member No.: 15,128 Region Association: Southwest Region |
We are building a track car for endurance racing in Lemons/Chump Car series from a 74 914-4 1.8/carb converted. Rules state we have to spend no more than $500 on the car minus the safety equipment (seat, cage, tires, wheels, brakes, etc..)
I am thinking of leaving off the 914 cooling system and much of the engine tins and running a electric fan to cool the motor. The fans are cheap $70 for 2100 CFM fan and I can also use some big ducting to cool motor at speed. Elec is free (no night racing) right and no HP drain. Just loosing the 50lbs of fan/ducting on the front of the motor seems worth it. I would build a shroud and use some of the existing tins push air across the jugs and heads. I would relocate the alternator above the oil fill/breather and run it off the small AC pulley that was behind the fan. Would love to buy a DTM or Fat 911 conversion kit but not allowed in budget. I was wondering what the peanut gallery thinks of this. Is this going to give me cooling issues? Will ALT function from smaller pulley? Thanks! |
andrew15 |
Jan 24 2013, 09:23 AM
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#2
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Newbie Group: Members Posts: 40 Joined: 10-April 10 From: Thunder Bay, ON Member No.: 11,594 Region Association: None |
Endurace racing an aircooled car comes down to a couple of things - cooling, cooling and a bit more cooling.
Last year we had a burned out 911 running in ChumpCar and controlling the heat was the main issue - after 14 hard hours of racing we found a couple of rocker shafts walked due to cam tower expansion. This, along with other failed seals / leaks put us on the trailer. Keep in mind, this was a rich running 2.4 with the 911 11 blade fan and an external cooler - it still had problems keeping up - we think we needed to have the external oil cooler in a better position Regards, Andrew M |
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