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Re: RPM and other important indicators response

To: "Roadster List" <datsun-roadsters@autox.team.net>
Subject: Re: RPM and other important indicators response
From: Ronnie Day <ronday@home.com>
Date: Wed, 7 Mar 2001 22:53:50 -0600
>In reality, the gauges are for actively keeping track of the action, while 
>the warning lights are just that, trying to tell you that you have already 
>developed a problem, and you better shut it down before it goes "Boom" 
>(read EXPENSIVE).
>With more experience, you will be able to remember shift points, EGT 
>readings, oil pressure & temp. It just takes practice, and getting used to 
>the action around you.
>It is a good, but odd feeling to realize you are bored flying down the 
>front straight of your local track, waving to your wife in the stands, 
>while running your Roadster to 7000 RPM before shifting. 

Gotta disagree, to an extent anyway. As Fred already mentioned, in 
competition and especially in auto-x things happen so quickly and your 
attention is focused so intently outside the car, you have little if any 
time to read gauges. You can glance to see where the needles are, but 
digesting the readings usually doesn't happen.

You may have heard the term "in the green". It's an aviation term that 
means that critical engine gauge readings are within normal operating 
range, not too high nor too low. In addition to numerals around a gauge, 
colored arcs were used divide the gauge face. Low range is usually 
yellow, normal range green (hence the term), and red for over. You'll 
often see race cars with marks or pieces of tape next to a gauge face to 
identify the low and high ends of the normal range, and it's pretty much 
accepted practice to mount a tach so that your shift point is at the 12 
o'clock position. All of this goes to being able to glance at the 
position of a needle not to read the gauge, but just to make sure the 
needles are they should be.

Having gone through all of that, I'll still probably be using a BIG light 
and maybe a buzzer set for the shift point and at least a BIG light set 
for around 15 psi for low oil pressure, particularly for auto crossing. 
If I'm turning 6K to 7K and the low oil pressure light comes on, I hope 
I'll have enough presence of mind to hit the kill switch in as hurry.

FWIW, Ron








Ronnie Day
ronday@home.com
Dallas/Ft. Worth
'71 510 2-dr (Prepared Class Autocrosser)
'73 510 2-dr (Street Toy)

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