autometer tach and dash tach,which one is right?

Rynb15

Member

Nov 21, 2005

132

2

18

Apr 3, 2006

#1

• Apr 3, 2006

• #1

I installed a autometer tach the other day. Well yesterday i finally got out to play with the 5.0. I noticed when i get in to the higher rpms, above 5k they are diff. The autometer guage keeps pulling at the same speed and when i hit 5800 on it, the dash tach reads 6300 but when i watch the dash tach it goes from 5300ish rpms to 6k almost intantly. I would imagine the auto meter guage is right. I hooked it up right to the coil. Just needing some feedback

 

8

87'GTstang

New Member

Feb 16, 2004

1,025

0

0

Apr 3, 2006

#2

• Apr 3, 2006

• #2

The stock tach can be off by as much as 10%, trust the autometer one. A quick "jump" in rpms isn't a characteristic of the stock tach however.

 

Rynb15

Member

Nov 21, 2005

132

2

18

Apr 4, 2006

#3

• Apr 4, 2006

• #3

thats what i was thinking. Thanks

 

1

1SLO306

My 97 GTP owns you ALL!

Mar 31, 2005

904

1

17

Muhlenberg, ky

Apr 4, 2006

#4

• Apr 4, 2006

• #4

yup trust the autometer tach.

plus the rev limiter is 6250

 

K

kreacher5.0

Member

Feb 27, 2006

122

0

16

Apr 4, 2006

#5

• Apr 4, 2006

• #5

Ive had the same problem. Mine is off about 200rpm at ideal then when it gets on up to about 6000 its way off the stock tach is about 7000

 

0

01silverbullit

New Member

May 7, 2005

39

0

0

Apr 4, 2006

#6

• Apr 4, 2006

• #6

When my autometer says 5800 my stock tach says 6100 so im sure the autometer is right

 

kr8zstang

New Member

Nov 3, 2005

53

0

0

upstate, sc

Apr 4, 2006

#7

• Apr 4, 2006

• #7

My tachs read the same till about 3k, then the stock tach climbs much faster than the autometer. When i hit 5k on the autometer, my stock reads over 7k!!
I'm sure the autometer is more accurate or i would have replaced about 12 engines by now!

 

Rynb15

Member

Nov 21, 2005

132

2

18

Apr 4, 2006

#8

• Apr 4, 2006

• #8

ok, i feel much better now. Im going to the track tomorrow and dont want to blow anything up

 

Strype

Cuthbert catcher

Founding Member

May 11, 1999

61

35

104

Huntsvegas, AL

Apr 5, 2006

#9

• Apr 5, 2006

• #9

My stock tack is off 200-300 rpm at idle...

 

88_GT_5_oh

Sportin' a turbo 5.0 in Canadistan

Jul 4, 2004

0

0

0

WPG/MB/CA

Apr 5, 2006

#10

• Apr 5, 2006

• #10

i mounted my tach to block my stock one cause i don't even care what its at lol.... i looked one time and i think at 3000 rpm on my sunpro tach the stock one is like 3300 rpm

 

1

1SLO306

My 97 GTP owns you ALL!

Mar 31, 2005

904

1

17

Muhlenberg, ky

Apr 5, 2006

#11

• Apr 5, 2006

• #11

my stock tach says i idle at 1500 and when my autometer tach is at 2500 the stocker is at 4500