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Jeremy
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Crane cams HI-6 problem....
Hi!
I installed a HI6 multi spark unit on my 68' 912 ( I know, not a 356 but... same engine) I'm having problems with my Tach. No matter what I do I cant get it to work right. I've used adapters, work arounds and nothing. I called crane and the guy i talked to basically said, "the tach lead wire should work" other than this scripted response he had nothing else to offer. Have any of you used this unit? I love it other than this problem. Smoother idle, Rev limiter, great throttle response. This thing is so sick... I can make the engine idle at 500 rpms!! Granted thats not where i left it though. I dont think that the 356 uses the same tach as the 912 but either way they should both be triggered the same way... from the coil negative wire. On mine its a Black with purple wire that goes straight to the back of the tach. Any help would be great! |
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10-10-2011, 08:18 PM
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Registered User
Join Date: Oct 2011
Posts: 1
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What is the tach doing (or not doing)? Is it displaying an inaccurate RPM or just not working at all? Have you tried a different known good tach to make sure that you're receiving the proper signal from the HI-6? Are you using an HI-6 capacitive discharge ignition or the HI-6S inductive ignition? Which tach adapters have you tried and did they change the output at all?
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10-11-2011, 10:30 AM
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Registered
Join Date: May 2006
Location: Tampa,FL
Posts: 134
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see if you can track down Bob on the bbs. He's pretty handy with electrics
Tachometer Rate Adapter |
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10-11-2011, 11:27 AM
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Jeremy
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Hi,
When i plug the coil - lead wire (black/ purple) to the back of the tach I plug it into the (-) terminal and I plug the 12V wire into the (12V) terminal. When I do that I get output, but slow output from the tach. but when I hook up the daisy chain of brown ground wires to the chassis of the tach so that the lights inside have a ground the tach stops working. Also it will stop working when i leave the brown disconnected and i slip the gauge into its respective hole in the dash (because its getting a chassis ground through metal to metal contact. I have the HI-6 unit, captive discharge and multi spark. I'm using the green tach output wire. Am I connecting this the wrong way? I'll try to post which wire color it 12v+ tomorrow. I think its yellow and blue? thanks! |
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10-12-2011, 05:27 PM
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Registered
Join Date: May 2006
Location: Tampa,FL
Posts: 134
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i think the output wire should be the black/purple
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10-14-2011, 04:24 PM
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