I was watching a police chase show on TV a few minutes ago. A cop was
chasing a '90 LeSabre at speeds approaching 120 MPH. Two questions:
1. Wouldn't this car have a fuel cutoff at around 109 MPH or were they not
implemented on the '86 to '91 LeSabre?
2. If no fuel cutoff, then what is the top speed of a stock LeSabre? I
assume you'd need to measure the speed externally since the speedo only
measures 85 MPH (unless you have the sport or digital cluster).
Just curious - I'm really bored right now. :)
My understanding is that pretty much all GM vehicles have had some kind of
speed limiter on them, except for some of the highest-performance vehicles
like the Corvette, Camaro and Firebird. Usually the speed limiter is set to
correspond to the speed rating of the tires, though it's sometimes less when
the vehicle is available with multiple speed-ratings of tires and the
limiter is all the same.
The exact speed would vary depending on the vehicle. However, I think that
at those speeds, the analog speedometer display tends to be inaccurate..
Robert Hancock Saskatoon, SK, Canada
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The speed limiter on pre-'85 LeSabres was the boxy shape pushing
through air. :-) Most likely the carb jetting for emissions/economy in the
V-8s. My dad's '61 LeSabre had a limiter .. . a speed "buzzer" that could
be preset for any speed. Scared the begeezers out of me the first time I
heard it .. . thought I had dropped a tailpipe .. . sounded like metal
dragging over concrete. That car had all the bells, whistles and buzzers
(plus a reflecting mirror for the speedo). ..
Lesabres are pretty quick cars. The ones I've owned (one 89 and two 90s) all
cut off at around195kph (which is what, about 115 mph?), and at that speed,
the car is panting pretty heavily (We have an old airfield near here that
you can take your car out and rip'her down to play at stupid speeds without
endangering anyone other then yourself :) ).....
I would think that even without the cutoff, the car wouldn't hit more then
maybe 130mph, and then only if you had it floored for 5 minutes, going down
hill, with a strong tail wind...... :) Also, you'd be running close to the
rev-limiter at that speed.
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