anyone need one? LOL
dash tach and autometer tach way different?
Thread Starter
Drifting
Joined: Dec 2007
Posts: 1,672
Likes: 8
From: Sumter South Carolina
dash tach and autometer tach way different?
'89 6 speed: Anyone else found this to be true? My dash tach says im idling at about 800 rpm but my autometer tach (I use it the most just easier and quicker to respond) is saying my idle is 600.
I know the autometer is correct cause I know what the engine sounds like. The cruise speed is off by about the same amount. Says 1700 rpm in 6th at 70mph on dash and the autometer reads 1400rpm in 6th at 70mph.
Is there a way to recalibrate the digital dash tach?
I know the autometer is correct cause I know what the engine sounds like. The cruise speed is off by about the same amount. Says 1700 rpm in 6th at 70mph on dash and the autometer reads 1400rpm in 6th at 70mph.
Is there a way to recalibrate the digital dash tach?
Suckin' gas, haulin' ass.
Joined: Apr 2010
Posts: 1,100
Likes: 8
From: Newport News Virginia
A magazine just did an article about this. I wish I could remember. There were some differences in tach readings dependant on the brand. The digital dash may be correct. Why do you need 2 tachs?
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Only way I have seen is a guy on 3rd Gen installed a variable resistance pot so he could adjust tacho to true revs .
I know a pot has been used to fix the erratic tacho problems common in the later ('90+) dashes
http://forums.corvetteforum.com/c4-g...ch-repair.html
If you have ever had a aftermarket tacho hooked up ;You will see it is about 30 seconds behind true revs
Not good when you are redline shifting at the drags
FWIW , my tacho has always read accurate; indication just lags behind acutal revs when you hit on it
I know a pot has been used to fix the erratic tacho problems common in the later ('90+) dashes
http://forums.corvetteforum.com/c4-g...ch-repair.html
If you have ever had a aftermarket tacho hooked up ;You will see it is about 30 seconds behind true revs
Not good when you are redline shifting at the drags
FWIW , my tacho has always read accurate; indication just lags behind acutal revs when you hit on it
Last edited by vetteoz; Feb 12, 2012 at 03:22 AM.
Melting Slicks
Joined: Dec 2008
Posts: 2,772
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From: Mystic CT
vetteoz said.....
You have got to be kidding or have had the worst made devices on planet earth even the Chinese could not make something that bad. With your statement if I made a 15 second pass my tach would read 3000 rpm at the end of the run.... and of course the 5500 rpm shift light would never come on for any of the times needed.
Dave
If you have ever had a aftermarket tacho hooked up ;You will see it is about 30 seconds behind true revs
Not good when you are redline shifting at the drags
Not good when you are redline shifting at the drags
Dave
- 1986 Original Owner -
Joined: Apr 1999
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From: North Yorkshire, England
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vetteoz said.....
You have got to be kidding or have had the worst made devices on planet earth even the Chinese could not make something that bad. With your statement if I made a 15 second pass my tach would read 3000 rpm at the end of the run.... and of course the 5500 rpm shift light would never come on for any of the times needed.
Dave
You have got to be kidding or have had the worst made devices on planet earth even the Chinese could not make something that bad. With your statement if I made a 15 second pass my tach would read 3000 rpm at the end of the run.... and of course the 5500 rpm shift light would never come on for any of the times needed.
Dave
Le Mans Master
Joined: Oct 2008
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From: Houston Texas
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Thread Starter
Drifting
Joined: Dec 2007
Posts: 1,672
Likes: 8
From: Sumter South Carolina
Well the digital dash is pretty laggy, I need to see the revs for rev matching for down shifts on track days. Putzing around town is ok for stock dash but when I autocross I put on my autometer in front of the stock dash.
