Lateral-g Forums - Speedometer issues?

Lateral-g Forums (https://www.lateral-g.net/forums/index.php)

- Interior and Electrical (https://www.lateral-g.net/forums/forumdisplay.php?f=40)

- - Speedometer issues? (https://www.lateral-g.net/forums/showthread.php?t=20688)

Speedometer issues?

Hey guys,

I've got a '69 Camaro w/ an LS1/T56 in it. I'm using a Speartech new harness and Stewart Warner electrical gauges...I have HP Tuners for it if that helps in this any.

My speedometer seems to work just fine with the car, except for one thing. When I am anywhere from ~70% throttle to full throttle, the speedometer will spin to 120-140, and stay there until I let off the throttle. I'm not too knowledgeable in wiring, so...any ideas? The Speartech harness had a speedometer-labeled wire, so it runs straight to the input on the gauge...

Thanks,
-Adam

Quote:

Originally Posted by AALynch (Post 212486)

Does the speedo bounce at idle? You might be picking up electrical interference from somewhere. I would try putting in a 1 micro-ferrid capacitor in the signal wire, one side of the cap. to the signal wire the other side of the cap. to ground.

Thank You Randy(D&Z Customs LLC.)
1-262-347-9741

Yes, I've noticed that!!! I just never cared much, because...well I was stopped and it doesn't matter LOL. When i'm accelerating, though, I need to know when to stop!

Thanks, I'll look into it.

-Adam

Quote:

Originally Posted by 66LS7 (Post 212499)

1 microfarad sounds a little large. I would think it would kill the speedo drive completely.

Don