4cyl to 5.0 conversion tach problem

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bronco4x4

New Member

Sep 28, 2005

43

0

0

fall river, ma

Mar 4, 2007

#1

• Mar 4, 2007

• #1

I have a 85 Mustang. The original tach is way off. Whats the easiest way to correct it? I dont want to use a aftermarket tach at all, i want the original look. Ive heard there may be a switch on the tach itself, but who knows. Ive also thought maybe taking off the needle and setting it where its supposed to be? Thanks

 

Deece

Member

Sep 16, 2005

47

0

7

Mar 4, 2007

#2

• Mar 4, 2007

• #2

Should be a switch on the front of the tach under the gauge bezel. Its marker 4 6 8 realign it

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Mar 4, 2007

#3

• Mar 4, 2007

• #3

Get a V8 tach. The only tach with a switch is the 6 cylinder tach and that tach only goes up to 6 grand. All the other tachs just have an empty space where the switch would be.

 

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bronco4x4

New Member

Sep 28, 2005

43

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fall river, ma

Mar 4, 2007

#4

• Mar 4, 2007

• #4

The original tach in my car goes up to 6k. Ill have a look at it tomorrow, and see if the switch is present.

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Mar 4, 2007

#5

• Mar 4, 2007

• #5

Its either 6k tachs that have it, or 6 cylinder tachs. Im not a 100% sure.

 

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greg251

New Member

Dec 17, 2006

55

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Mar 4, 2007

#6

• Mar 4, 2007

• #6

All my pre 87 stangs had the switch. Take the panel off in front of the cluster and you will see a switch that says 4/6/8.Turn to 8 and you are good to go.

 

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bronco4x4

New Member

Sep 28, 2005

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fall river, ma

Mar 5, 2007

#7

• Mar 5, 2007

• #7

Yep found the switch, but only the 4 and 6 cylinder switch work. I guess i need to find another gauge cluster from the junk yard. At least now its a little more accurate being switched to 6 instead of 4.