Tach wire
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
Tach wire
My tach filter is shot on my '76 L82. What does this item do; filter the signal to the tach or noise suppression? Can I bypass it and wire it straight or do I have to have this
filter? They cost $30 and I dont want it on unless it is an important part..
Your thoughts please.. Thanks
filter? They cost $30 and I dont want it on unless it is an important part.. Your thoughts please.. Thanks
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
I would suggest you replace it as GM put it there for a reason, to filter electrical spikes. If they could have saved the cost times a few 100K cars, they would have. I know many people have bypassed it and have not had issues, but again it was originally there for a reason.
BTW, the filter is just two resistors and two capacitors. You can build your own for a couple bucks worth of radio shack parts. It won't look original, but will serve the purpose. Here is a schematic:
Here's a pic of one I've built for a few forum members.
Electrically its the same as the original but if you construct your own I suggest you mount it under the dash in the tach line vs the original intake manifold location just to better protect it from the harsher underhood environment.
Good Luck!
BTW, the filter is just two resistors and two capacitors. You can build your own for a couple bucks worth of radio shack parts. It won't look original, but will serve the purpose. Here is a schematic:
Here's a pic of one I've built for a few forum members.
Electrically its the same as the original but if you construct your own I suggest you mount it under the dash in the tach line vs the original intake manifold location just to better protect it from the harsher underhood environment.
Good Luck!
Last edited by ACECO; Jun 26, 2007 at 12:45 PM.
Drifting
Joined: Nov 2005
Posts: 1,795
Likes: 1
My tach filter is shot on my '76 L82. What does this item do; filter the signal to the tach or noise suppression? Can I bypass it and wire it straight or do I have to have this filter? They cost $30 and I dont want it on unless it is an important part..
Your thoughts please.. Thanks
filter? They cost $30 and I dont want it on unless it is an important part.. Your thoughts please.. Thanks
out the unit.
if your not 100% original under the hood
forum member "ACECO" (George) makes a replacement that can be wired in using the
plug ends off of your old one and hidden very
easily.
no one has spotted mine yet
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
I would suggest you replace it as GM put it there for a reason, to filter electrical spikes. If they could have saved the cost times a few 100K cars, they would have. I know many people have bypassed it and have not had issues, but again it was originally there for a reason.
BTW, the filter is just two resistors and two capacitors. You can build your own for a couple bucks worth of radio shack parts. It won't look original, but will serve the purpose. Here is a schematic:
Here's a pic of one I've built for a few forum members.
Electrically its the same as the original but if you construct your own I suggest you mount it under the dash in the tach line vs the original intake manifold location just to better protect it from the harsher underhood environment.
Good Luck!
BTW, the filter is just two resistors and two capacitors. You can build your own for a couple bucks worth of radio shack parts. It won't look original, but will serve the purpose. Here is a schematic:
Here's a pic of one I've built for a few forum members.
Electrically its the same as the original but if you construct your own I suggest you mount it under the dash in the tach line vs the original intake manifold location just to better protect it from the harsher underhood environment.
Good Luck!
I like the though of a the one you make, Newer technology / parts. How much and how can I get one. PM me if needed. Thanks again !
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
I see yours has 3 wires. How does it wire up? The oem filter I had was just hooked in-line with the tach wire and mounted on the manifold.
Do I have to get to the back of the tach to install it?
I just put the interior all back in and I don't want to do that again..
Do I have to get to the back of the tach to install it?
I just put the interior all back in and I don't want to do that again..
Thread Starter
Racer
Joined: Jan 2007
Posts: 314
Likes: 0
From: Pittsfield, Ohio
grn= dist. Is that right?
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
