2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

tach vs speedo in 88 N/A 5-speed

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Old Apr 9, 2005 | 08:31 PM
  #1  
emory_stagmer's Avatar
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From: Lutherville, MD
Question tach vs speedo in 88 N/A 5-speed

I'm pretty sure my speedometer is reading pretty low - worse the faster I go. Can anybody give me an accurate reading on their speedometer at 3000 RPM in each gear?
If you didn't read the title I've got an '88 N/A 5-Speed

Thanks,
Emory
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Old Apr 10, 2005 | 12:03 AM
  #2  
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From: OC
strange.. mine reads fast.. then again.. i have 60 profile tires on my 14's.. :-D
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Old Apr 10, 2005 | 04:28 AM
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From: Geneseo IL usa
http://www.f-body.org/gears/ go there and enter your gear ratios its acturate with in 3 MPH on my 7

here i did the work for ya

RPM 1st Gear MPH 2nd Gear MPH 3rd Gear MPH 4th Gear MPH 5th Gear MPH 6th Gear MPH
500 3 4 6 9 13
600 3 5 8 11 15
700 4 6 9 12 18
800 4 7 10 14 20
900 5 8 12 16 23
1000 5 9 13 18 25
1100 6 10 14 19 28
1200 6 11 15 21 30
1300 7 11 17 23 33
1400 7 12 18 25 35
1500 8 13 19 26 38
1600 8 14 21 28 40
1700 9 15 22 30 43
1800 9 16 23 32 45
1900 10 17 24 33 48
2000 10 18 26 35 50
2100 11 18 27 37 53
2200 11 19 28 39 55
2300 12 20 30 40 58
2400 12 21 31 42 60
2500 13 22 32 44 63
2600 13 23 33 46 66
2700 14 24 35 47 68
2800 14 25 36 49 71
2900 15 25 37 51 73
3000 15 26 39 53 76
3100 16 27 40 54 78
3200 16 28 41 56 81
3300 17 29 42 58 83
3400 17 30 44 60 86
3500 18 31 45 61 88
3600 18 32 46 63 91
3700 19 32 48 65 93
3800 19 33 49 67 96
3900 20 34 50 69 98
4000 20 35 51 70 101
4100 21 36 53 72 103
4200 21 37 54 74 106
4300 22 38 55 76 108
4400 22 39 57 77 111
4500 23 39 58 79 113
4600 23 40 59 81 116
4700 24 41 60 83 118
4800 24 42 62 84 121
4900 25 43 63 86 123
5000 25 44 64 88 126
5100 26 45 66 90 129
5200 26 46 67 91 131
5300 27 47 68 93 134
5400 27 47 69 95 136
5500 28 48 71 97 139
5600 28 49 72 98 141
5700 29 50 73 100 144
5800 29 51 75 102 146
5900 30 52 76 104 149
6000 30 53 77 105 151
6100 31 54 78 107 154
6200 31 54 80 109 156
6300 32 55 81 111 159
6400 32 56 82 112 161
6500 33 57 84 114 164
6600 33 58 85 116 166
6700 34 59 86 118 169
6800 34 60 87 119 171
6900 35 61 89 121 174

Last edited by tecknomage; Apr 10, 2005 at 04:54 AM.
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Old Apr 10, 2005 | 08:03 AM
  #4  
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From: Silver Spring, MD
Originally Posted by emory_stagmer
I'm pretty sure my speedometer is reading pretty low - worse the faster I go. Can anybody give me an accurate reading on their speedometer at 3000 RPM in each gear?
If you didn't read the title I've got an '88 N/A 5-Speed

Thanks,
Emory
I belive your 88 'vert has 3.9 gears in the rear instead of the normal 4.1 gears. Be sure to include that in your calculations :O
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Old Apr 10, 2005 | 08:58 AM
  #5  
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From: FORT WORTH, TEXAS,USA
3050 equals 70mph.1987 non-turbo
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Old Apr 10, 2005 | 09:21 AM
  #6  
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From: Geneseo IL usa
Originally Posted by Tofuball
I belive your 88 'vert has 3.9 gears in the rear instead of the normal 4.1 gears. Be sure to include that in your calculations :O
i looked up the gears for the 88 GXL my bad

you need to go and run the gear caluclator with your:

axel gear as 3.909
red line 6900
1st 3.475
2nd at 2.002
3rd at 1.366
4th at 1.000
5th at 0.711

to get the proper list

sry about the missunderstanding
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