Tach outta wack?
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Joined: Mar 2002
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From: Wichita KS
Tach outta wack?
I just had my car dyno'd today (disapointing, but now I know what I'm starting with) and the guy was saying the tach wasn't calibrated right. It looks like it's at the right RPM when idling but he said he was letting off at 5000 (I didn't want to go much higher than that, don't know how much this old engine can take) and the sheet only went up to about 4300. Which is most likely to be right, the car or the dyno? If the car is off what is causing it? What can I do to fix this or do I have to take it somewhere? Thanks for the help.
Melting Slicks
Joined: Jun 2002
Posts: 2,609
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From: Behind the wheel of a large automobile
Re: Tach outta wack? (Blankman)
Does your tach jump around at all, or does it sweep smoothly? I'm by no means a pro but I beleive it is either your tach filter (in line, near tach) or the tach circuit board (right in the tach gauge itself)
If it's your board, get a new one. I attempted to get mine repaired and it's way off....
Hopefully the "pro's" chime in for you soon .....
If it's your board, get a new one. I attempted to get mine repaired and it's way off....
Hopefully the "pro's" chime in for you soon .....
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Joined: Mar 2002
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From: Wichita KS
Re: Tach outta wack? (1979toy)
Connect it to a dwell meter that has a tach function and run it.
Melting Slicks
Joined: Dec 2000
Posts: 2,041
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From: Wichita, KS
Re: Tach outta wack? (Blankman)
Any mechanic that has been around for a while should have one. I'm sure that I still have one in my tool box that you could use in case you don't find one anywhere else.
Were you planning on posting the dyno numbers? :rolleyes:
[Modified by 1979toy, 1:12 PM 8/21/2003]
Were you planning on posting the dyno numbers? :rolleyes:
[Modified by 1979toy, 1:12 PM 8/21/2003]
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Thread Starter
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Joined: Mar 2002
Posts: 90
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From: Wichita KS
Re: Tach outta wack? (1979toy)
Were you planning on posting the dyno numbers? :rolleyes:
[Modified by 1979toy, 1:12 PM 8/21/2003]
[Modified by 1979toy, 1:12 PM 8/21/2003]