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CC Advertisers
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12-09-2008, 09:53 AM
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CC Member
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Join Date: Apr 2004
Location: Long Beach,
CA
Cobra Make, Engine: BDR #168 427W 66+K miles and counting
Posts: 336
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Not Ranked
Timing light hookup
Dumb question, but with the battery in the "boot", what do I hook the positive and negative leads for my timing light to? I have a single wire alternator, would it be safe to attach the positive lead to the alternator wire, and the negative (black) wire to the frame? BDR #168, neg. ground system, 351W, no accesories to speak of.
Thanks in advance
__________________
Bill
"If your work speaks for itself, don't interrupt"
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Advertising
12-09-2008, 10:05 AM
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CC Member
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Join Date: Jul 2008
Cobra Make, Engine: Backdraft Racing #699, Keith Craft 427 SB w/ 600+ Flywheel HP, Mass-Flo EFI
Posts: 18
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Not Ranked
That's how I do it.
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12-09-2008, 10:08 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
That works but I like to put my positive feed on the solinoid post and then ground the black wire to my engine. I have been told that sometimes the coil will cause some intermitentant misses in your light.
Clois
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Sunshine, Asphalt and no stop signs...Perfect
"Let's roll"
"Be part of Something Good
......Leave Something Good Behind!"
from CD "Long Road Out of Eden"
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12-09-2008, 10:09 AM
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CC Member
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Join Date: Feb 2006
Cobra Make, Engine: Hurricane HM1073 Keith Craft Genesis 427FE/482 CI
Posts: 390
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Not Ranked
I use jumper cables from the "boot" up to the engine for the positive wire. I hook the negative to a good ground in the engine compartment.
I suppose you could hook it to the alternator wire. Mine is very hard to get to so that's why I use the jumper cable method.
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12-09-2008, 10:32 AM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,027
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Not Ranked
I use a battery (4 AA batteries if I remember right) powered timing light.
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12-09-2008, 10:43 AM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Claremore,
OK
Cobra Make, Engine: RUCC, 289 c.i. with a T-5 "Living the Cobra Experience"
Posts: 994
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Not Ranked
I hook up the positive to the solenoid & the negative to a ground on the engine, works just fine.
__________________
Juggernaut
"Living the Cobra Experience"
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12-09-2008, 10:54 AM
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CC Member
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Join Date: Apr 2004
Location: Long Beach,
CA
Cobra Make, Engine: BDR #168 427W 66+K miles and counting
Posts: 336
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Not Ranked
Thank you all, good stuff once again.
I have a battery-powered light but it doesn't have the bells and whistles my new timing light has.
Cheers,
__________________
Bill
"If your work speaks for itself, don't interrupt"
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12-09-2008, 03:14 PM
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CC Member
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Join Date: Jan 2008
Location: Williamsport,
PA
Cobra Make, Engine: Kellison Stallion 468 FE
Posts: 2,703
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Not Ranked
i use a battery op light now but have a older sun induction light, it doesn't seem to like the msd too much i get erratic strobe. i was told thats common,
i really like the battery operated one, the lack of dangling wires is a plus, especially with headers. i used to use wire extensions to get to the battery, with rubber sleeves over the clamps so they wouldn't touch.
Fred
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12-09-2008, 03:54 PM
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CC Member
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Join Date: Apr 2006
Location: Los Angeles,
ca
Cobra Make, Engine: Hurricane Motorsports, 427w
Posts: 439
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Not Ranked
I have an extra battery that I keep charged enough that it powers my light.
Matt
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Hurricane Motorsports #1053; 427w
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12-09-2008, 06:57 PM
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Beam Me Up Scottie
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Join Date: Aug 2004
Location: Squantum (part of Quincy),
MA
Cobra Make, Engine: SPF1049 Titanium w/black stripes, 351W with Trick Flow Heads, Tremec 3550
Posts: 7,592
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Not Ranked
Grab the spark plug lead with either hand while standing in a puddle. Your eyes will blink 8 times a second (the brain only can take in info at that rate), which is ideal for any V-8 engine. You wasted good money on a timing light.
Try it with an old style magneto and we will call you Rudolph.
Inductive pick-up around plug wire #1. Pos lead of light to battery cable on firewall (starter solenoid). Neg lead grounded somewhere that is a good ground. If no flashing, try another ground.
On some inductive timing lights, they do not always work with spark plugs gapped up in the 0.045 range or higher. You may need to temporarily close the spark plug gap to 0.030 to get the light to work properly. Do not ask me how I know that.
__________________
Warren
'Liberals are maggots upon the life of this planet and need to get off at the next rotation.' (Jamo 2008)
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