Jumpy Tach needle
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by Bob Onit
$62.99 
I would love to know whats inside that little sucker
It looks like nothing more than a carbon choke
I would love to know whats inside that little sucker
It looks like nothing more than a carbon choke
Even going to Radio Shack and paying 10x markup, it's still a dollars worth of components. However if you want it "original", then you need the tubular can/case and mounting tab. I guess that's where the other $61.99 goes. 
I built them on a stamp sized piece of electronics breadboard and heatshrink them. Three wires coming out one end. Dist, tach and ground. Based upon the non-hermetically sealed packaging, I usually recommend they be installed in the tach line under the dash so as to better protect them from the elements.
Here's a recent one that went to a forum member.
Last edited by ACECO; Jul 7, 2006 at 07:20 PM.
Drifting
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Originally Posted by TopGunn
I'll take a picture of mine for you when I get home but what ACECO said is correct about the wiring. Sounds like he has a good deal for you too!
Bill
Bill
Good luck with the problem ESU..
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by ESU
I definitely dont have that! :{
ESU
ESU
I'll put one in the mail for you Cory. As indicated in the above post, I recommend that you install it in the tach line under the dash so as to protect it from the weather and heat, etc of the engine compartment.
Let me know if you have any questions.
Have A Great Weekend!
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by ACECO
I'll put one in the mail for you Cory. As indicated in the above post, I recommend that you install it in the tach line under the dash so as to protect it from the weather and heat, etc of the engine compartment.
Let me know if you have any questions.
Have A Great Weekend!
Let me know if you have any questions.
Have A Great Weekend!
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by ESU
George your the best! How do I hook it up tho? 3 wires as opposed to 2?
The third wire is the ground. With the stock metal tube, it gets the ground connection when it is bolted in place. With the one I'm sending, you just need to make this ground connection with a wire instead.
I'll include a little instruction/wire id sheet I printed up. If you have any questions, don't hesitate to ask.
I'll try and get it in the mail Sat morn but if not it will be Mon. You should get it sometime next week. Let me know when it arrives.
Have A Great Weekend!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Drifting
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Hey ACECO, you do a nice job making those up. You could buy some really cheap small potting molds and drop that thing inside then fill it with potting material to encapsulate the electronics. Sick a ground tab inside while doing that so when cured it could be bolted the the manifold with the tab. I bet you could sell a bunch of them at a resonable price and make out OK with it.
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by ACECO
The third wire is the ground. With the stock metal tube, it gets the ground connection when it is bolted in place. With the one I'm sending, you just need to make this ground connection with a wire instead.
I'll include a little instruction/wire id sheet I printed up. If you have any questions, don't hesitate to ask.
I'll try and get it in the mail Sat morn but if not it will be Mon. You should get it sometime next week. Let me know when it arrives.
Have A Great Weekend!
I'll include a little instruction/wire id sheet I printed up. If you have any questions, don't hesitate to ask.
I'll try and get it in the mail Sat morn but if not it will be Mon. You should get it sometime next week. Let me know when it arrives.
Have A Great Weekend!
Thx a million I owe you again. ALso thx to TopGunn for the photos. I'll let you know when it arrives and when I hook it up. It'll give me an excuse to rip out the tach and install the digital,
Cory
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by ESU
George,
Thx a million I owe you again......... It'll give me an excuse to rip out the tach and install the digital,
Cory
Thx a million I owe you again......... It'll give me an excuse to rip out the tach and install the digital,
Cory
Good Luck!
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by TopGunn
Hey ACECO, you do a nice job making those up. You could buy some really cheap small potting molds and drop that thing inside then fill it with potting material to encapsulate the electronics. Sick a ground tab inside while doing that so when cured it could be bolted the the manifold with the tab. I bet you could sell a bunch of them at a resonable price and make out OK with it.
I was thinking about what I could enclose it in and some kind of a poured encapsulated enclosure came to mind. I had done this years ago when I worked for a contract R&D electronics shop. I also have thought about using a piece of electrical conduit or similar as the case but still need to figure out an easy way to do the mounting tab.
Once again thanks for the input.
Racer
Joined: Apr 2005
Posts: 276
Likes: 0
From: Conroe TX
Cruise-In IX Veteran
I saw a similar discussion on an engine run-on issue (http://forums.corvetteforum.com/show...php?t=1422898).
I have Dual Spalls on my car as well and see both a jumpy tach needle and some dieseling.
If I just moved the connections to a dedicated connection off the fuse block, would I avoid this jumpy tach? I think that is what I got from the thread to date, but I wanted to make sure I wasn't reading things wrong. The other alternative appears to be the filter on the tach line.
Is that a reasonable summary?
Dave
I have Dual Spalls on my car as well and see both a jumpy tach needle and some dieseling.
If I just moved the connections to a dedicated connection off the fuse block, would I avoid this jumpy tach? I think that is what I got from the thread to date, but I wanted to make sure I wasn't reading things wrong. The other alternative appears to be the filter on the tach line.
Is that a reasonable summary?
Dave
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by c5_droptop
I saw a similar discussion on an engine run-on issue (http://forums.corvetteforum.com/show...php?t=1422898).
I have Dual Spalls on my car as well and see both a jumpy tach needle and some dieseling.
If I just moved the connections to a dedicated connection off the fuse block, would I avoid this jumpy tach? I think that is what I got from the thread to date, but I wanted to make sure I wasn't reading things wrong. The other alternative appears to be the filter on the tach line.
Is that a reasonable summary?
Dave
I have Dual Spalls on my car as well and see both a jumpy tach needle and some dieseling.
If I just moved the connections to a dedicated connection off the fuse block, would I avoid this jumpy tach? I think that is what I got from the thread to date, but I wanted to make sure I wasn't reading things wrong. The other alternative appears to be the filter on the tach line.
Is that a reasonable summary?
Dave
ESU
Racer
Joined: Mar 2005
Posts: 487
Likes: 0
From: Jacksonville FL
Originally Posted by ACECO
Thank You.
I was thinking about what I could enclose it in and some kind of a poured encapsulated enclosure came to mind. I had done this years ago when I worked for a contract R&D electronics shop. I also have thought about using a piece of electrical conduit or similar as the case but still need to figure out an easy way to do the mounting tab.
Once again thanks for the input.
I was thinking about what I could enclose it in and some kind of a poured encapsulated enclosure came to mind. I had done this years ago when I worked for a contract R&D electronics shop. I also have thought about using a piece of electrical conduit or similar as the case but still need to figure out an easy way to do the mounting tab.
Once again thanks for the input.
sell it of $20. i would pay that over $60.
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by ESU
I originally had it on the fuse block and now moved it to the alternator, seems a little better. Will see what happens after installing ACECO's contraption.
ESU
ESU
Just as a disclaimer I don't know if the filter is going to help your specific issue. A filter was installed in the tach line and came that way from the factory. It was there to protect the tach board from the noisy/spiky signal coming from the ignition.
Now if your issue is the whole electrical system (in other words the main 12 volt "bus") and this is where the spikes are coming from that are currently causing the tach to jump, then the stock filter or the one I sent isn't going to help. It only protects the tachs signal input line, not its power source.
Hope that was understandable.
Either way I hope the filter helps this issue. However if it doesn't, leave it there to do the job it was intended for vs. removing it.Good Luck! Let us know the outcome.
Last edited by ACECO; Jul 11, 2006 at 11:38 PM.
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
Originally Posted by ACECO
Contraption???
Just as a disclaimer I don't know if the filter is going to help your specific issue. A filter was installed in the tach line and came that way from the factory. It was there to protect the tach board from the noisy/spiky signal coming from the ignition.
Now if your issue is the whole electrical system (in other words the main 12 volt "bus") and this is where the spikes are coming from that are currently causing the tach to jump, then the stock filter or the one I sent isn't going to help. It only protects the tachs signal input line, not its power source.
Hope that was understandable. Either way I hope the filter helps this issue. However if it doesn't, leave it there to do the job it was intended for vs. removing it.
Good Luck! Let us know the outcome.
Just as a disclaimer I don't know if the filter is going to help your specific issue. A filter was installed in the tach line and came that way from the factory. It was there to protect the tach board from the noisy/spiky signal coming from the ignition.
Now if your issue is the whole electrical system (in other words the main 12 volt "bus") and this is where the spikes are coming from that are currently causing the tach to jump, then the stock filter or the one I sent isn't going to help. It only protects the tachs signal input line, not its power source.
Hope that was understandable.
Either way I hope the filter helps this issue. However if it doesn't, leave it there to do the job it was intended for vs. removing it.Good Luck! Let us know the outcome.
Cory
Drifting
Joined: Nov 2003
Posts: 1,634
Likes: 4
From: Northern NJ
St. Jude Donor '04 & '05
Originally Posted by ESU
Sorry George, didnt mean to be insulting on your handiwork. Just the technical ignorance of me coming out. I really appreciate the help and you going thru the effort of making this and mailing it to me, mea culpa , mea culpa, whatever that means.
Cory
Cory
Just busting your stones.
Thread Starter
Drifting
Joined: Jun 2004
Posts: 1,881
Likes: 9
From: staten island ny
George,
The package arrived yesterday thank you very much. I havent had a chance to install it yet. Going to be away next week on vacation so it might be till after I get back. Again, thx very much, you're a true gentleman,
Cory
The package arrived yesterday thank you very much. I havent had a chance to install it yet. Going to be away next week on vacation so it might be till after I get back. Again, thx very much, you're a true gentleman,
Cory
