ok so im not sure if this is suppose to happen, but when i redline my 12a the horn goes off?

happen's every time, no matter what gear or what the situation is. once the needle hits 7 grand i get a loud BEEP!

this normal? like some sort of ghetto redline warning? or is something seriously effed up?

 

I'm 99% sure that's normal. It's the shift-up buzzer. My FC used to sing to me.

 

Yeah its not the horn, its a little buzzer. With some ingenuity, you can adjust when it goes off, disconnect it, or make it into a shift light instead of that annoying buzzer.

 

Its perfectly normal its an "Over Rev Buzzer" that was designed to remind you to shift.

 

it scares everyone

dammit if its not raining tmw i'm taking my car to los gatos

 

I love it! haha
"did someone just honk at you?" or "what the heck was that?"

 

thanks guys glad to know my cars not just trying to eff with my head

shift light you say? and i can adjust when the "buzzer" goes off? i must look into this. i just happen to have a few random shift lights from my old autometer tach laying around

 

What's in Los Gatos? lol

 

My 83 never had one when i had it and then the first time i drove the gsl-se i had i kept hearing it and it took a few times to figure it out,, soon after it was removed.

 

cats.....

 

Two big concrete ones.

 

It's not an "upshift" buzzer; it's an "Over-Rev Warning." In it's stock form, it marks a theoretical line you cross on a stock engine at your eventual peril.

It came and went a couple times across the 1st gen timespan. 79's had them, 80's did not, later models some did.

 

here is a little write-up someone did on how to make it adjustable

http://www.jimrothe.com/mazda/overrev.html

 

That's awesome. The thought of that never occurred to me...

And in LG? Not as many cat anymore. I think the coyotes ate em all...

 

So not all cars had them? I thought mine was just broken. I really want one how do I go about getting it. I think the honking noise is awsome.

 

I have both -- the stock overrev buzzer and a Raptor shift light. I like them both, but I give a slight nod to the shift light because of 2 things:

1) It's more accurate. The OEM tach reads about 10% too high. When the analog buzzer goes off, you're never quite sure what the RPM is. With a good digital shift light, it will go off at exactly the RPM you set it to.

2) It's easier to adjust the RPM limit on the shift light. On mine, I just turn a dial on the underside. With the buzzer, I'd have to open up the cluster . . .

 

79's had them, 80's didn't... I'm not sure which year they were brought back for, but I know some later FB's had them though the circuitry changed.

On the SA's they were a literal buzzer mounted to the rear of the instrument panel, hooked into the tach circuitry.