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Old 03-31-2010, 02:04 AM   #44
Jeff Lee
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Location: Anthem, Arizona
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Default Re: oil retention devices

Another issue I have not seen addressed is oil temperatures. This often does not relate to the bracket or Super Class racers as they are not "typically" running as us; the "performance based class racers".
I think you'll find a lot of the former running 50wt oils and changing the oil once or twice a season. The later will often run 10 wt oils and change it as often as every race. But maintenence, although an issue, is not the real concern I have, it's oil temperatures. Personally, per my engine builder, I don't want to see oil temps above 150 degrees based on the oil and clearances I have in the engine. He says if it hits 200 degrees, park the car until it drops. Even if it means loosing a round. Some may have a differing opinion but it's my engine and that's what I go by so I really don't care what Smokey Yunick said 30 years ago. Hardblock or similar products retain heat already.
Call it a diaper, call it a blanket, but no matter what, it's serves to retain heat in the oil pan. I see no way around this. I'd like an independent party to analyze the change in oil temp and the amount of time to cool down with a blanket as opposed to without a diaper.
And I'm with everybody else on this, I see no problem in the class. The issue in the sportsman ranks is the classes that seldom maintain their engines and continue to race when performance is suffering. A Super or Top racer that slows two tenths is more likely to adjust the throttle stop or ad more NOS than to pull the pan and inspect the engine. That always leads to trouble.
I'm sending this post to the S/SS committee
Tech@nhra.com
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