Big Block Dart Forums banner

Early A-body Instrument Regulators

2688 Views 5 Replies 4 Participants Last post by  Glow Worm
this may come in handy for some of you guys...
1 - 6 of 6 Posts
Thanks, that is good info.

All 67-69 Barracudas and 70-71 rallye dash a-bodies have the reg built into the gas guage, too.

Thanks, Joe! Personally, I think the fix shown in Ehrenberg's article at:

Is a better fix, but as it says, this one can improve non functional gauges.

I have four early Dart clusters, and plan on doing an article of my own "one of these days"

Gotta do some tinkering, and setup my camera and workbench.
yet another improvement in the pain in the butt mech regulators. written on
.... (form another long winded post) you might wanna check your temp and oil pressure gages, since they work with the one and only volt limiter at the back of your dash cluster, and most likely that volt limiter will be reading low on the output side. That's to say that if your tank's dent hasn't considerably moved the side wall enough to make the float read half a tank off, you might be as well reading low on temp and oil pressure...

If you have to replace the limiter you might wanna fab your own electronic regulator using a 7805 transistor (cheap, cheap, cheap and far more reliable than stock limiter wich consist on a bimetal piece with a really thin wire wrapped around... almost like crying for failure... heheh)

this is how I've deal with the limiter (using the stock casing):

where's located (on my dash unit at least... yours might be different)

the transistor I used: (chopped off the middle leg because the back is connected to it

opening the old unit for using it for casing purposes

The unit opened and all the internals gutted (leave just the contacts riveted to the phenolic board)

Drill a 1/8" hole on the steel casing

creating slots on the side for adding to the cooling effect (use a dremel cut off wheel or similar)

I use 2 soldered cables to repack the thing. The right leg is the regulated 5 v output (stearing at the transistor's front face)


installed back

for checking the float's arm geometry, pay attention to the float assy angle. When your tank's full, the arm should be at top position. If the fluid level is lower than the float when full, then you want to carefully grab the arm and bend the floating part end down. You can check your progress using a vohm multitester: when you have near zero resistence is when your gage will read FULL. You can also monitor how it will work, considering that the gage's range is 70-0 ohms... 70 empty 0 full tank
See less See more
The "instruments" are workin.
NOW, how do I get the dash lights to burn so I can see the dadburn things!
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.