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Anyone know how to wire a Super Sun Tach II up to a 305 Pontiac? all the wires are red so im a little confused. Thanks.

If all the wires are red, someone has extended them. If you open it up, you should find the normal RED-12v+, BLACK-ground, GREEN-coil-, and WHITE-light.

Okay.Thanks a bunch.

Just a note, some of those older tachs have a lot of needle bounce so you need a resister on the tach feed wire. 47000 ohms if I remember correctly. Available at Radio Shack.

Doug in AZ

Thanks for all the info. I got to looking and the engine has electronic ignition, no coil. Can anyone tell me how to hook up a tach up to that?

Q: what year is the 305? Is it definitely not an HEI?

On the HEI distributor cap there is a terminal Labled "TACH" right next to the one Labled " BAT".

The BAT should have a wire allready to it ( orangest-pink color)

You need a female crimp terminal on your green tach wire to attach it to the cap's" TACH" terminal.

Heres the Sun Super Tach 2 Instructions : http://www.sunpro.com/publish/2007/09/2 ... _16472.pdf


Doug in Az

Its an 81 Pontiac. Thanks alot for this info.

Does anyone know what the letters inside the actual tach where the wires hook up to mean?

Sorry, I can't help you with the tach question, but I do have a question for you.

Since you are in Canada, are you putting a real Pontiac V-8 in your Astre?
GM Canada liked to put a Chevrolet engine in a Pontiac for some reason.
Pontiac didn't make a 305 V-8. But, Pontiac did make a 301 V-8 from 1977-1981.
The last year any GM vehicle had a Pontiac V-8 from the factory was 1981. So, it could be a real Pontiac V-8 and you are a trailblazer. Check out this 'unfinished' thread on putting a Pontiac V-8 in an H-Body: viewtopic.php?t=195

You mean the circut board?

Sorry I dont, you will have to contact Sunpro or Actron for help.

Doug in AZ

what letters or symbols are next to the wires ?

They are all letters. Theres a "T" "L" "B" and "G" My guess is that the G is ground and the L is for lights but I have no clue.

res0o7eb wrote:
Since you are in Canada, are you putting a real Pontiac V-8 in your Astre?
GM Canada liked to put a Chevrolet engine in a Pontiac for some reason.
Pontiac didn't make a 305 V-8. But, Pontiac did make a 301 V-8 from 1977-1981.
The last year any GM vehicle had a Pontiac V-8 from the factory was 1981. So, it could be a real Pontiac V-8 and you are a trailblazer. Check out this 'unfinished' thread on putting a Pontiac V-8 in an H-Body: viewtopic.php?t=195

Im actually putting a 283 Chevy in my astre. This is for another car I have. I thought it was a pontiac 305. My bad

75Astre wrote:They are all letters. Theres a "T" "L" "B" and "G" My guess is that the G is ground and the L is for lights but I have no clue.

T-tach terminal
L-lights
B-battery (keyed source)
G-ground

My guess.