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Post by alexbud on May 29, 2020 17:27:29 GMT -5
Want to try my hand at an early roll cage 70's Ford Four Cam Champ car. I have an AMT Grant King kit to use as a donor. Wondering two things. Was wheelbase in early 70s for Champ Cars between 96 and 100 inches? Also, why two coolers, one at rear cage upright, and one near front axle? Many champ cars of the era like Unser's Viceroy had this set up. Thanks in advance to anyone who can help out.
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Post by smbrm on Jul 6, 2020 8:45:07 GMT -5
Regarding oil coolers, particularly before the 70’s: When racing at tracks or at times of the year when it was hotter, extra oil cooling both for engine oil and gearbox or differential provided benefits. Oil consumption was not as well controlled as we experience today. Large oil tanks were common to ensure an adequate supply during races. These large oil tanks contained enough oil that the oil acted as a heat sink and the tank a cooler so that additional cooling needs were masked. On dirt tracks oil coolers could become clogged with dirt leading to locations that minimized clogging and extra coolers to minimize deterioration of cooling capability. Air/ oil coolers became more prevalent as oil,consumption limits were tightened. They offered more efficient cooling and negated the need to find an appropriate home for the mass of all the oil previously carried.The mass of 5 gallons and more of oil would have a significant effect on car handling depending on where it was located in the chassis.
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Post by gwstexas on Jul 7, 2020 9:44:24 GMT -5
Want to try my hand at an early roll cage 70's Ford Four Cam Champ car. I have an AMT Grant King kit to use as a donor. Wondering two things. Was wheelbase in early 70s for Champ Cars between 96 and 100 inches? Also, why two coolers, one at rear cage upright, and one near front axle? Many champ cars of the era like Unser's Viceroy had this set up. Thanks in advance to anyone who can help out. The wheelbase for Champ cars was commonly 96 inches. Gary |
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Post by hurtubise56 on Jul 7, 2020 10:57:03 GMT -5
Some cars also ran a small cooler for the power steering. Would depend on the era you are modeling.
Brian
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Post by nesmra on Jul 13, 2020 17:00:40 GMT -5
Hi Guys The oil cooler on the roll cage on the dirt cars or mounted on a 60s Indy car could have been for the rear end. Remember how often the cars back then would burn the rear end up. I don't know how they would drive a pump for the rear end. May be some of the rear ends had a built in pump or a drive for a pump. It would be interesting to know. Anyone out there that owned , worked on or drove a car with a rear oil cooler might have that information. Ralph
Ralph Ellery NESMRA ( It's a Super Modified thing ) Brooksville Fl.
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Post by bobbyc on Nov 17, 2020 11:18:25 GMT -5
I ran some Dirt Champ cars with the oil coolers on the left side of the roll cage at the rear, but they were for the engine oil, not the rear gear lube. I don't recall ever seeing any race car- TQ, Midget, Sprint, or Dirt Champ Car with a cooler for the rear gear lube.
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