Speedo off, other causes?
Speedo off, other causes? As the wife was following me the other night, she let me know that apparently I was doing about 80 when my speedo said I was only doing about 72.
ASSUMING I HAVE THE STOCK SIZE TIRES AND STOCK REAR END RATIO
Is there anything else I should look at that can cause this kind of inaccuracy? I do plan on verifying my gear ratio once I get the car back.
ASSUMING I HAVE THE STOCK SIZE TIRES AND STOCK REAR END RATIO
Is there anything else I should look at that can cause this kind of inaccuracy? I do plan on verifying my gear ratio once I get the car back.
As the wife was following me the other night, she let me know that apparently I was doing about 80 when my speedo said I was only doing about 72.
ASSUMING I HAVE THE STOCK SIZE TIRES AND STOCK REAR END RATIO
Is there anything else I should look at that can cause this kind of inaccuracy? I do plan on verifying my gear ratio once I get the car back.
ASSUMING I HAVE THE STOCK SIZE TIRES AND STOCK REAR END RATIO
Is there anything else I should look at that can cause this kind of inaccuracy? I do plan on verifying my gear ratio once I get the car back.
It might be in the tuning, most people don't measure the tire height like they did for these cars.
Stock tire height is programmed as 24.91. As many different ways to get an accurate number I found that a rollout test with half worn tires is as close as I could get to the factory programmed size.
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Joined: Jan 2003
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Joined: Dec 2001
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From: Jacksonville, FL
It is possible that the Speedo is off in the other car. I'll have to do some checking on that tonight. So really the only way this could be affected is by tires or gears? I tried going to that f-body.org site but it comes up as an infected site or some crap.
I have 275/40 17" tires on the car right now. That site you linked gave me some good info as to how fast I should be going at a given gear and RPM. Thanks for the link! If it's not right, guess I need to look into whether the original owner put aftermarket gears in it. If not, I'm confused!
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That's kind of what I'm thinking. I got some info on how to identify what gears you have by turning the wheel one revolution and counting how many times the drive shaft turns. I'm going to check it that way and if I have too, pull the rear cover. I hate to waste all that new fluid I just put in there though :-(
If you listen to everything your wife says, you have bigger troubles than your spedo!
Every portable GPS I've seen has a speed indicator when its in map mode. If you get a hold of one, put it in map mode and drive along a straight road and you'll get the true speed.
Every portable GPS I've seen has a speed indicator when its in map mode. If you get a hold of one, put it in map mode and drive along a straight road and you'll get the true speed.
I had the same thought as you and when I picked the car up today, turns out the Subaru has the screwy speedo. The speed on the GPS never varied by more than 1mph when I was on the highway going 70. I don't know why I didn't think to check it with the GPS in the first place.