I have heard many stories about how far off our tacs can be. But i have never noticed it being off. I verify it with my autometer shift light which lights up the moment my Tac hits 6,000rpm. And with my Tweecer data logs showing me shifting at like 6,100 or so but hey im sure it revs for a second while i react to the shift light. All in all i would say its right on.
That's the issue - they are not super reliable across the board (it's hit or miss if the tach in a given car will be right-on). If you have a friend with a known accurate tach, hook it up and use it for a day and see if the stocker stays in concert with the the aftermarket gauge. Remember that tachs tend to be off by percentages.
Good luck.
Or just go dyno your car. That's how I found out about my tach.
Mine reads about 300 too high
I've seen all kinds of reports in the range of 200 to 800 off
btw ... they have been on the high side
Wonder ifFord did it that way on purpose?
Grady
lol. expensive way to find out if my tach is off
i would like to dyno tho. by the way, care to list your mods and how much power you put down?
so if its reading higher than its actually turning....thats a good thing
all the ones you seen that were off read higher?
nice set up man
just for clarification...when u ran a 14.07, is that when you made 271whp or 200whp
Actually I edited my post. ET's are from 2006. My car club has a yearly "Fastest List" You have to run your time THAT year. Some guys have gone slower, but that's the way it goes.
I really think the only thing that kept my times fairly consistent were the spring, shocks, and converter upgrades. My engine kept losing power, and I kept adding other mods to keep it hanging in there.
I'm finally working on the engine now.
hissin' is like a knowledge base
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