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Index > Engine/Drivetrain > Thread: How do I adjust the Redline buzzer?
Thread: How do I adjust the Redline buzzer?
brad


Rotorhead
Posts: 1672
posted November 25, 2002 06:13 PM

How do I adjust the Redline buzzer?

Redline buzzer goes off at 6000rpm and the tach's redline (well, it's brown on my 74 tach) is 7000rpm. With my lightweight flywheel, 41mm chokes in the Dellorto, 4.62 gears and my heavy right foot I'm always making the redline buzzer ring.

How do I adjust it up to 7000rpm?


____________
-brad-
74 REPU Lawn Green
81 Rx-7 racecar. 12a J-
Bridge

       
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repuguru


Redlining
Posts: 319
posted November 25, 2002 07:12 PM

Why don't you just let that be an early warning to get ready to shift?

Your motor will love you for it.


       
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Tom93R1


Redlining
Posts: 458
posted November 25, 2002 09:25 PM

Maybe he is like me and drives around at 6500rpm all day, haha.
Or maybe not...

Anyways, electronics in a 1974 vehicle can't be that sophisticated. I wonder if the redline buzzer point could be changed by a well placed resistor. If I can find my Chiltons manual and it turns out that there is a wiring diagram I will try and figure out how the buzzer is set up.
____________


'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!

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wankel_dreams


Redlining
Posts: 293
posted November 26, 2002 12:33 PM

might consider using a rheostat so you won't have to do the hit and miss buying a bunch of different ohm resistors
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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Tom93R1


Redlining
Posts: 458
posted November 26, 2002 06:13 PM

I looked at my Chiltons manual and now I feel stupid for even thinking that it may have a useful wiring diagram. I would just try sticking a rheostat in-line with the buzzer as Wankel Dreams suggested and see if that will do it.
____________


'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!

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brad


Rotorhead
Posts: 1672
posted November 26, 2002 06:59 PM

rheostat

Any idea what ohm range rheostat?

I recall the 1st gen rx7s had a screw on the back of theirs they can adjust the buzzer.

I do like to spin the motor up but passengers keep asking 'why does that buzzer keep going off?'

:-P

Thanks
brad

       
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wankel_dreams


Redlining
Posts: 293
posted November 26, 2002 11:47 PM

i'd think that if the rheostat is going to be in line (series) that you should start from zero (giving you your current redline buzzer) and work up from there. its probably not going to take much. i just looked at the diagrams in the gallery, and they weren't much help. I think i have a Mazda wiring diagram at home, and i know i have factory service manual at home. If i get a chance i'll look at them this week.
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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wankel_dreams


Redlining
Posts: 293
posted November 27, 2002 09:34 PM

well, my '76 workshop manual was no help. About all it shows is the pin-out of the connector to the dash meters. My '77 wiring diagram shows the circuits, but doesn't show a buzzer, other than the one that that is for seat-belt when u turn on ignition. is that the same buzzer that sounds for over red-line? I honestly have never heard one in any of the rotaries i've owned...and not for lack of trying!!!
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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wankel_dreams


Redlining
Posts: 293
posted November 27, 2002 09:39 PM

is the over rev buzzer inside the tach?
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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chuyler1


Hauling
Posts: 140
posted April 23, 2012 10:39 AM

Did anyone ever figure this out? My buzzer actually works...but 6,000 RPM is a bit early.

       
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Brad


Rotorhead
Posts: 1672
posted April 26, 2012 11:53 AM

I never figured it out.

       
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