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Topic: tach filter

in Forum: C3 Electrical


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tach filter (1/7)
 9/6/10 11:22am
tonyb47
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Suffern, NY - USA

Vette(s):
1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system

Joined: 3/16/2005
Posts: 227

My tach is stuck on 900 rpms, when I first purchased my 76 I replaced the tach circuit board which did not fix the problem. I saw a tach filter in the ecklers catalog, could that be the problem and where is it located

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tach filter (2/7)
 9/6/10 12:12pm
eboLifetime Member
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Holland Patent, NY - USA

Vette(s):
#1 *1980 White, Red interior 14,000 mile #2 *1980 Red, Oyster interior 93,000 miles Resto project car, rebuilt to 383 stroker

Joined: 6/3/2008
Posts: 4421

Mine has same problem but at 5500......mines much faster than yours!LOLLOL
When i shut the car off it only is 3500 or so.....mine is still faster than yours when it's shut offLOL
I posted about how to fix a while ago so I'm sure if you do a search a few posts will come up. I have not bothered with it but maybe I'll get in to that this layup season.
Evil Smileebo


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Evil Smileebo
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tach filter (3/7)
 9/6/10 5:22pm
lukesvetteLifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6812

Tony, 

There's a procedure to recalibrate or "zero" the needle on the tach after the tach board is replaced. Has to be done with the tach out of the dash. Sounds like next year's BBQ - or any other weekend you feel like coming by....

I am running my tach without the filter for quite some time and never had a problem.

Paul
lukesvette2010-09-06 14:24:32
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tach filter (4/7)
 9/8/10 10:04am
tonyb47
Former Member
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Suffern, NY - USA

Vette(s):
1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system

Joined: 3/16/2005
Posts: 227

Paul where can I find that procedure, thanks

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tach filter (5/7)
 9/8/10 11:00am
tonyb47
Former Member
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Suffern, NY - USA

Vette(s):
1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system

Joined: 3/16/2005
Posts: 227

paul, nevermind I found the procedure with my paperwork, thanks again you always come thru with the answers

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tach filter (6/7)
 9/8/10 4:05pm
lukesvetteLifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6812

Be careful and don't push too hard on the needle!!
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tach filter (7/7)
 9/9/10 9:21am
yostusota
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York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

Joined: 5/18/2010
Posts: 1518

I think the filter just keeps the tach needle from bouncing around with idle fluctuation like mine does with the cable drive..
Rich


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