What Did You Do To Your G-Body Today? [2022]

[Built6spdMCSS]

What was the brain for it on a carb'd car?

I think it was a module that plugged into the diaphragm.

 

[Texas82GP]

What was the brain for it on a carb'd car?

Early cars had a transducer (I think that is the right term) that the speedometer cable ran to from the transmission. It was mounted up on the driver's side inner fender. A shorter speedometer cable ran from it to the gauge. The transducer, the vacuum actuator and the switch on the column was all there was to it other than the brake light switch (unless if I'm missing something).

Later cars didn't use the transducer. Instead, they had an optical sensor on the back of the speedometer that provided the speed reference. They also have a little module that mounts to a bracket above the throttle pedal.

This is all from memory so guys, please correct me if I'm wrong.

 

[Cauterize]

Cauterize, that picture you posted of your motor shows a situation that is about as classically stock as the top of an intake can get! GREAT Reference picture for someone looking to identify all the various hoses and wires. Even shows the cruise control body.

Nice and crisp shot; I do plan on adding a copy of it to my reference pages. Any more along the same line to share?? Huh? Huh?? Huh???



Nick

Let me know what other angles you want and I'll snap you any photos you need Nick.
I plan on keeping this 305 as factory complete as possible for at least the next year or 2.

 

[Supercharged111]

Early cars had a transducer (I think that is the right term) that the speedometer cable ran to from the transmission. It was mounted up on the driver's side inner fender. A shorter speedometer cable ran from it to the gauge. The transducer, the vacuum actuator and the switch on the column was all there was to it other than the brake light switch (unless if I'm missing something).

Later cars didn't use the transducer. Instead, they had an optical sensor on the back of the speedometer that provided the speed reference. They also have a little module that mounts to a bracket above the throttle pedal.

This is all from memory so guys, please correct me if I'm wrong.

Hmm, since mine has a digital dash I wonder if I need some sort of adapter to support both the electronic sensor and a cable?

 

[86LK]

Early cars had a transducer (I think that is the right term) that the speedometer cable ran to from the transmission. It was mounted up on the driver's side inner fender. A shorter speedometer cable ran from it to the gauge. The transducer, the vacuum actuator and the switch on the column was all there was to it other than the brake light switch (unless if I'm missing something).

Later cars didn't use the transducer. Instead, they had an optical sensor on the back of the speedometer that provided the speed reference. They also have a little module that mounts to a bracket above the throttle pedal.

This is all from memory so guys, please correct me if I'm wrong.

you are correct on the early cars. I sold a system off the flooded elkie I bought last year, needed to send about 11 vacuum lines, transducer, special bracket for the intake manifold, and both speedo cables.

later years I don't know.

 

[Supercharged111]

you are correct on the early cars. I sold a system off the flooded elkie I bought last year, needed to send about 11 vacuum lines, transducer, special bracket for the intake manifold, and both speedo cables.

later years I don't know.

You lost me at 11 vacuum lines. I'm now curious about the signal the speedo put out on later cars.

 

[Built6spdMCSS]

You lost me at 11 vacuum lines. I'm now curious about the signal the speedo put out on later cars.

Some Vac lines were on the brake pedal switch if I remember right.

 

[pagrunt]

Some Vac lines were on the brake pedal switch if I remember right.

All set ups from '78-'88 used a vac switch with the brake pedal to disengage the system when braking.

 

[CopperNick]

We-ell, since the shot you posted is taken from the passenger side perspective, more or less, additional shots from the front and the driver's side, shot at about the same distance or even slightly closer, would show the same amount of detail at the same degree of resolution. That possible???



Nick

 

[Cauterize]

We-ell, since the shot you posted is taken from the passenger side perspective, more or less, additional shotf from the front and the driver's side, shot at about the same distance or even slightly closer, would show the same amount of detail at the same degree of resolution. That possible???



Nick

I am smelling what you are stepping in.
Ill get that for you after I clean the carb and put it back on.