Where do you hook up the pickup for a tune-up (i.e. low rpm) tachometer to a 305 with stock electronic ignition? Or can you?

Thanks....

 

The same place you would hook it up on any HEI ignition...jumper into the tach output wire on the cap connector...has a green wire coming from it.
ed

------------------
Ed Maher - Moderator @ the Carb Board
85 Z28 - 357c.i. - stolen 12/24
Click Here for the Rest
'83 Grand Prix - low miles
Only mods...Homemade open element, 2.5" cat and exhaust, CK-B metering
and the way out ******* style in effect
stock 14" wheels w/ wire hubcaps in front
snowflake 15" alloys in the back

 

Green wire- ok. I wasn't sure which wire was the tach pickup for the dash.

Thanks!

 

Mine doesnt have a green wire, its brown. The coil in cap distributors have the tach terminal marked on the coil cover.

 

Yea I couldn't find a green wire either but I found a brown one.

One problem tho- how can I connect the tach to the wire without having to pierce/cut the insulation? My tach's got the old alligator-type connectors on it. Is there a metal extension I can buy that I can put inline with the brown wire to the distributor/coil cap connection and be able to tap off of that?


[This message has been edited by David Trimble (edited July 22, 2000).]

 

Here's an idea (assuming its coil in cap)
Take the cover off, you will see where the wire was hooked up to. Its one of the 2 main leads from the coil. Hook your wire to it up there, solder it in place or something, or if its temporary, you could just leave the cover off and use an alligator clip on it.

 

Max- excellent idea!! I'm planning on replacing the cap anyway (has ~50K miles on it) so I'll add a wire to the new one before I install it. And yes, it's the built-in coil type.

Thanks!


------------------
Original owner - '84 T/A w/stock 305HO 5-speed

[This message has been edited by David Trimble (edited July 23, 2000).]

 

i usually just pull the plug out, slip a piece of 20ga wire into the tach terminal then push the plug back. Dont leave it in there after you are finished though.