The International CBX Owners Association

http://www.cbxclub.com/davespage/cyc80-1.html

and here's a quote from the article that explains why all my CBX's run soo good. 13 row stacked plate oil coolers make about a 100 f difference in oil temperature. And the difference gets bigger the hotter the day and harder you ride the bike.


The correction factor can compensate for day-to-day changes in air density and humidity to give consistent results, and temperature has a bearing on the correction factor because air density is a function of temperature and barometric pressure. But temperature can have a much more decisive effect than its relation to the correction factor. Some engines - like the CBX - are very heat sensitive. Remember, by Honda's own dyno data, a 25-degree hike in head temperature caused the peak horsepower to fall from 74.47 to 68.07. The CBX taxes the blower-cooling system at the Webco dyno anyway, and that's been a matter of record since Honda's engineers witnessed the first dyno of the CBX there back in 1977. Hot dry air - 116 degrees and very little humidity - would be just the thing to cause the CBX to get weak knees. The temperature difference alone 116 degrees F versus 86 F) was enough to explain how the same CBX engine could make 71.59 horsepower on one day, and 77.21 horsepower on another.

Mine must be making 150 bhp over here.....

The temperature of the intake charge has a tremendous effect on the horsepower, here is a quote from an article on "making horsepower"....

For every 10 Degrees F reduction in intake charge temperature, a 1% increase in power will be realized. Example: A 400 HP engine with an intake temperature drop of 70 Degrees F, would gain approximately 30 HP on the cooling affect alone.

Which is why a blow through turbo (which can be aftercooled) can make more HP than a draw through (can't be aftercooled because fuel will condense on the runner walls).

Cheers, Tom