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Author Topic: Speedometer reads low  (Read 1982 times)

bhazard

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Speedometer reads low
« on: March 26, 2009, 02:24:00 PM »

At 60 mph (indicated by speedo) I am actually going 64-65 mph. Pretty big error. Anyone else have this problem? Tires are stock size. All I can think of is someone at some point put a different speedo gear in or the gauge itself has a poor calibration.

The upside is that I have been getting better gas mileage than I thought. Today I filled up, went an indicated 237.3 miles on 7.23 gallons. Multiplying the mileage by 1.075 to correct it gives me 255.1 miles. Divide that by the gallons and I got 35.3 mpg. Not bad for still having bad rear wheel bearings.
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93 Festiva L, lotsa miles, BP+T/G25MR swap, Rocketchip
Best ET 12.99, Best MPH 109.8, 22\\" slicks
88 T-bird Turbo Coupe, 182k miles, slightly modded, 14.71 @ 92.4mph 2.02 60\\\', end of the road

Gostlrs

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Speedometer reads low
« Reply #1 on: March 26, 2009, 02:46:00 PM »

wow i get just over 200 on 10 gallons
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Current Rides
2015 Nissan Frontier
2015 Chrysler 300
1990 240sx (SR20DET Swapped)
1992 240sx Convertible

Yuri

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Speedometer reads low
« Reply #2 on: March 26, 2009, 06:29:00 PM »

tip for saving gas: don't go over 3,000 rpm
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Gostlrs

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Speedometer reads low
« Reply #3 on: March 26, 2009, 06:38:00 PM »

ha ha ha....

i think i shift at 6500 all the time..LOL
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Current Rides
2015 Nissan Frontier
2015 Chrysler 300
1990 240sx (SR20DET Swapped)
1992 240sx Convertible

bhazard

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Speedometer reads low
« Reply #4 on: March 27, 2009, 04:11:00 AM »

Im usually in fifth by 30. The sooner you get to fifth the better. With our steep gearing and small turbos we can easily pull from under 1500 rpm. I can cruise fifth gear at 25 or even 20 mph.
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93 Festiva L, lotsa miles, BP+T/G25MR swap, Rocketchip
Best ET 12.99, Best MPH 109.8, 22\\" slicks
88 T-bird Turbo Coupe, 182k miles, slightly modded, 14.71 @ 92.4mph 2.02 60\\\', end of the road

magicmini

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Speedometer reads low
« Reply #5 on: March 27, 2009, 06:24:00 AM »

Thanks! Maryellen
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CapriTypeR

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Speedometer reads low
« Reply #6 on: March 27, 2009, 07:01:00 PM »

Magicmini-
Welcome to the forum!

Your hardtop will fit as well on your 92 as it did on the 94!

Enjoy!

--Russ
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STE_6000

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Speedometer reads low
« Reply #7 on: March 27, 2009, 08:34:00 PM »

is that true? i thought the 93 and 94s where like 1 inch longer at the top where the window is. so that there is a gap from front to back where the top touches the front window.
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Gus Kelley

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Speedometer reads low
« Reply #8 on: March 27, 2009, 09:42:00 PM »

Hey guys!  My two bits of certainty. The top fits all years ,as I've been doing it the last year and a half.  Gus
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itsmeisatu

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Speedometer reads low
« Reply #9 on: March 28, 2009, 03:37:00 AM »

A hardtop will fit 91-94. I have a 91 hardtop on a 94 at this time and have had it on a 93 before this one. I had planned to take it off this weekend but the forecast is for 2-5 inches of snow tonight
George
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Gus Kelley

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Speedometer reads low
« Reply #10 on: March 28, 2009, 03:47:00 AM »

Hey George! Sounds like bad timing to go topless  Gus.
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Gostlrs

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Speedometer reads low
« Reply #11 on: March 28, 2009, 05:27:00 AM »

glad i am in phoenix....no use for that top thing you guys keep on talking about
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Current Rides
2015 Nissan Frontier
2015 Chrysler 300
1990 240sx (SR20DET Swapped)
1992 240sx Convertible

Gus Kelley

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Speedometer reads low
« Reply #12 on: March 28, 2009, 07:26:00 AM »

Hey Gost!  Au-contrear!  You've gone Sol beating you to death during the day. Have the top on by day ---gone by night.  Gus
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bhazard

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Speedometer reads low
« Reply #13 on: March 28, 2009, 12:34:00 PM »

Ohhh le sigh....
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93 Festiva L, lotsa miles, BP+T/G25MR swap, Rocketchip
Best ET 12.99, Best MPH 109.8, 22\\" slicks
88 T-bird Turbo Coupe, 182k miles, slightly modded, 14.71 @ 92.4mph 2.02 60\\\', end of the road

Gostlrs

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Speedometer reads low
« Reply #14 on: March 29, 2009, 02:33:00 AM »

too lazy to put it up and down...parking in the garage is so much easier
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Current Rides
2015 Nissan Frontier
2015 Chrysler 300
1990 240sx (SR20DET Swapped)
1992 240sx Convertible