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CC Advertisers
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05-12-2004, 12:53 PM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
MSD Box Noise?
I have a MSD 6AL box and the other day when I was driving I heard what sounded like a quiet electric hum coming from the box. It almost sounded like a hum you would get with an electric fuel pump (I have a mechanical pump so that wasn't it  ). I only hear it periodically and the car is running fine.
Is this normal? Has anyone else heard this?
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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05-12-2004, 01:31 PM
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CC Member
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Join Date: Nov 2002
Location: Allentown,
PA
Cobra Make, Engine: ERA 289 FIA #2086, 302/320 HP, Dart heads, hydraulic
Posts: 383
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Not Ranked
Chaplin,
Its normal. The coils and caps inside vibrate as magnetic fields are induced in them. If you listen closely you may even hear a tick each time it fires a plug. Drive faster so you don't hear it.  |
05-12-2004, 10:23 PM
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Senior Club Cobra Member
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Join Date: Jul 2001
Location: Evans,
CO
Cobra Make, Engine: NAF 289 FIA, 347 stroker with Weber 48's, building a '48 Anglia gasser, driving a '55 Chevy resto-rod
Posts: 3,119
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Not Ranked
Chappie
Jims right--never noticed it on my other car but on this one I would hear it and it was driving me nuts thinking something was wrong. Then by accident I happened to hear it when I was under the hood and had the engine running at about 12-1500 rpm.
__________________
"Breathe in... Breathe out... then move on with life. Lifes too short to sweat the small stuff"
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05-13-2004, 05:01 AM
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CC Member
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Join Date: Nov 2001
Location: Fort Wayne,Indiana,
Posts: 423
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Not Ranked
Chaplin,
You can hear a little humm over the sidepipes? GEEEESH! I can't even hear my electric fan over mine.
John |
05-13-2004, 06:47 AM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Jim/Gary-
Thanks guys. Good to know nothing's wrong.
John- I can't hear much over the pipes.  The only reason I can hear it is because it is mounted inside the car under the dashboard. And I've only heard it a couple times.
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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05-13-2004, 08:02 AM
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CC Member
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Join Date: Jun 1999
Location: Bay Area,
FL
Cobra Make, Engine: What Cobra?
Posts: 7,193
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Not Ranked
A noisy MSD box in a Cobra?
Turn the radio up a little more.
TURK
__________________
OBAMA IN in 2012
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05-13-2004, 08:10 AM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Turk,
I would but I don't drive the most accurately detailed 4000 to original specification since the demise of CSX 4027, and therefore, I do not have a radio.
 
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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05-13-2004, 08:42 AM
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CC Member
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Join Date: Apr 2002
Location: Klamath Falls,
Or
Cobra Make, Engine: shell valley
Posts: 246
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Not Ranked
Chaplin I belive there was a thread on this about a year ago can't find it but the offending member (MSD Box) was sent to factory and was replaced might call MSD I have had several and mine don't sound like my fuel pump. 
Ken
__________________
Talent is your head in communication with your balls.
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05-13-2004, 09:04 AM
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CC Member
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Join Date: Jul 2003
Location: Cleveland,
OH
Cobra Make, Engine: SPF1670 Stroked Little Windsor - Runs OK.
Posts: 1,244
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Not Ranked
__________________
J.P.
Ohio Cobra Club
Token Gashole
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05-14-2004, 08:14 AM
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Senior Club Cobra Member
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Join Date: Mar 2002
Location: God's country,
ME
Cobra Make, Engine: Original ERA 427sc, Powered by Gessford
Posts: 2,678
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Not Ranked
Junket-
Just to be safe, I called MSD and they said that it is normal for the box to make a slight humming noise and that it is nothing to worry about.
__________________
Replica is not a dirty word.
"If you can't be a good example, then you'll just have to be a horrible warning."
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