L98IROCZ89

I have my used MSD 6A installed and mounted on the firewall right in front of the driver. With the windows up and not moving, you can hear the box making a buzzing sound... is this normal???

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech Thermomaster chip with 160stat, MSD 6A, March Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell Universal 24# injectors

More info and pics on my webpage:http://go.to/iroc-z

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F-BIRD'88

The noise should go away if you rubber mount it.

Vader

L98,

Does the sound remind you of a camera flash recycling? the power supply has a similar oscillator and similar whining sound.

The noise is the high voltage power supply oscillator switching off and on rapidly. It's normal for this type of CD box (and camera flashes).

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Later,
Vader
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If you want to beat the World, it might reach up and pull you down...
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MSD tech

The transformer in the units will make a buzzing or humming sound. We coat the components to make them water resistant, if this coating cracks on the laminations of the transformer you will get this buzzing noise. It is not detrimental to the unit in anyway, but if it is to bothersome we can replace the transformer in the unit and recoat it which will quite it down. All and all you should not here it.

Thanks,

Joe
MSD tech

mtx28

if you dont have rubber mounts, get a piece of fuel hose and cut 4 pieces off, each about a 8th inch long, use them as mounts. btw, mine didnt make noise on my 74

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74 Z28-- 383/400 SOLD

LS-1, come to me now

Mark W. Winning

The unit will buzz. Both my 6AL and my Digital 6 made noise when mounted in the car. Thats normal.

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP