C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Is the 84-89 stock digital tach accurate?

Thread Tools
 
Search this Thread
 
Old 04-05-2002, 02:06 AM
  #1  
Hole-Shot
Drifting
Thread Starter
 
Hole-Shot's Avatar
 
Member Since: Oct 2001
Location: Kewaskum Wisconsin
Posts: 1,437
Received 1 Like on 1 Post

Default Is the 84-89 stock digital tach accurate?

Are the stock digital units real accurate? Has anyone ever compared it to an aftermarket tach?
Is anyone using an aftermarket tach? If so, what brand and how do you like it?

Thanks in advance for the help!
:cheers:
Old 04-05-2002, 09:21 AM
  #2  
vader86
Team Owner
 
vader86's Avatar
 
Member Since: Sep 2001
Location: Athens AL
Posts: 59,639
Received 1,400 Likes on 1,016 Posts
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019

Default Re: Is the 84-89 stock digital tach accurate? (Hole-Shot)

No, theyre usually off by as much as a 200rpm
Old 04-05-2002, 09:37 AM
  #3  
vettlesstintguy
Instructor
 
vettlesstintguy's Avatar
 
Member Since: Dec 2001
Location: wichita falls texas
Posts: 164
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Is the 84-89 stock digital tach accurate? (vader86)

i know mine is`t accurate. WAY to jumpy to be accurate.
Old 04-05-2002, 09:39 AM
  #4  
JoBy
Drifting
 
JoBy's Avatar
 
Member Since: Mar 2001
Location: Timra, Sweden
Posts: 1,972
Received 216 Likes on 168 Posts

Default Re: Is the 84-89 stock digital tach accurate? (Hole-Shot)

It is a computer counting pulses so that part should be very accurate A lot of Corvettes seem to show too much RPM on the tach. Mine does too. It is probably because the dash gets a bad signal from the distributor.
Old 04-05-2002, 09:40 AM
  #5  
dgoodhue
Safety Car
 
dgoodhue's Avatar
 
Member Since: Dec 1999
Location: Framingham MA
Posts: 4,691
Received 1 Like on 1 Post

Default Re: Is the 84-89 stock digital tach accurate? (vettlesstintguy)

Even if it was accurate, it is way too slow in 1st and 2nd gear.
Old 04-05-2002, 11:27 AM
  #6  
scorp508
Team Owner
 
scorp508's Avatar
 
Member Since: Mar 2000
Location: Boston, MA
Posts: 83,266
Received 41 Likes on 36 Posts

Default

The LCDs are too slow in 1 and 2 to really be accurate. The dash only updates it's information 16 times a second, but it is still too fast for the original LCDs to keep up with.
Old 04-05-2002, 11:33 AM
  #7  
rafzz4
Instructor
 
rafzz4's Avatar
 
Member Since: Dec 2001
Location: San Diego CA
Posts: 247
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Is the 84-89 stock digital tach accurate? (Hole-Shot)

I think they are accurate more then enough for daily driving. The Bars are also very cool and I use the Bar more then the numbers themselves.

Actaully they are a really nice design and I love it!!

Rich

Old 04-05-2002, 05:37 PM
  #8  
GiDvEtTe84
Drifting
 
GiDvEtTe84's Avatar
 
Member Since: Apr 2000
Location: Maurice, LA
Posts: 1,915
Likes: 0
Received 0 Likes on 0 Posts

Default Re: Is the 84-89 stock digital tach accurate?

I love mine, but i will probably put a monster tach in one day. :)
Old 04-05-2002, 09:19 PM
  #9  
dgoodhue
Safety Car
 
dgoodhue's Avatar
 
Member Since: Dec 1999
Location: Framingham MA
Posts: 4,691
Received 1 Like on 1 Post

Default Re: (scorp508)

The dash only updates it's information 16 times a second, but it is still too fast for the original LCDs to keep up with.
Scorp, what is the status or time for those reproduction/faster LCD's?
Old 04-08-2002, 08:10 AM
  #10  
drive it
Drifting
 
drive it's Avatar
 
Member Since: Apr 2001
Location: Ca.
Posts: 1,756
Received 118 Likes on 94 Posts

Default Re: (dgoodhue)

I've run diacom-p and my wide band with rpm pick-up and noted that when the dash shows 5500rpm, the ecm/rpm pu will see 5800rpm.
Old 04-08-2002, 12:02 PM
  #11  
scorp508
Team Owner
 
scorp508's Avatar
 
Member Since: Mar 2000
Location: Boston, MA
Posts: 83,266
Received 41 Likes on 36 Posts

Default

Scorp, what is the status or time for those reproduction/faster LCD's?
Still a few months out, but they are moving forward.
Old 04-08-2002, 01:09 PM
  #12  
Hole-Shot
Drifting
Thread Starter
 
Hole-Shot's Avatar
 
Member Since: Oct 2001
Location: Kewaskum Wisconsin
Posts: 1,437
Received 1 Like on 1 Post

Default Re: Is the 84-89 stock digital tach accurate? (Hole-Shot)

ttt

Get notified of new replies

To Is the 84-89 stock digital tach accurate?




Quick Reply: Is the 84-89 stock digital tach accurate?



All times are GMT -4. The time now is 12:00 PM.