914-6 original overheating issues above 85 mph?, 914-6 |
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914-6 original overheating issues above 85 mph?, 914-6 |
unpolire |
Feb 24 2013, 12:00 AM
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#1
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Member Group: Members Posts: 51 Joined: 6-July 08 From: Los Angeles CA Member No.: 9,260 Region Association: Southern California |
An aerospace engineer friend of mine was over and we were discussing 6-cylinder powerplants in the 914. A friend of his bought a 914-6 new and used to complain that he could not drive over 85 mph, after skiing in Reno, on his return, due to detrimental air pressure over the engine cover area as a result of the body's aerodynamics. Has anyone experienced this?
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sixnotfour |
Feb 24 2013, 01:17 PM
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#2
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914 Wizard Group: Members Posts: 10,434 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains |
He was also reminiscing , about when I........ 1970- 40 yrs ago.
more than likely he was low on oil, common problem with -6 owners |
ConeDodger |
Feb 24 2013, 01:27 PM
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#3
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Apex killer! Group: Members Posts: 23,612 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California |
He was also reminiscing , about when I........ 1970- 40 yrs ago. more than likely he was low on oil, common problem with -6 owners I wondered about that too Jeff. Wouldn't the oil tank keep the engine full? I guess I don't really know how that wet sump works. Better learn if I'm going to put a 6 in... (IMG:style_emoticons/default/blink.gif) |
ArtechnikA |
Feb 24 2013, 01:49 PM
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#4
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
I wondered about that too Jeff. Wouldn't the oil tank keep the engine full? I guess I don't really know how that wet sump works. Better learn if I'm going to put a 6 in... 6's have dry sumps. Yes, the tank keeps the engine supplied. But it also acts as a thermal flywheel. And oil in the tank radiates a significant amount of heat to the airstream even through the fender as you quickly discover if you touch the area after a long run or track session. In this regard, it's like being low on oil in a /4. Oil that sits in the tank is radiating heat and not making another trip through the engine heating up. The less there is, the more often it is recirculated. 85 mph with stock-ish tire diameter is a little shy of 4000 rpm, which should be plenty of airflow to keep the engine cool. But stock /6's also had points, and when the rubbing block wears, the timing gets retarded. Too far off spec in either direction makes heat. |
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