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question for lucky 13

BILLY T

New member
Joined
Dec 23, 2006
Messages
1
Location
STATEN ISLAND NY
Corvette
1966 BLACK COUPE, 1988 RED COUPE
hi,
i was following one of your post about your electricial system.
you said, you put in a breaker switch that connects to battery.
i was wondering where you purchased it. sounds light a good idea.
i have a 1966 coupe with no electricial protection.
thanks much,
bill
 

Tom Bryant

Well-known member
Administrator
Joined
Nov 9, 2000
Messages
7,332
Location
Edgerton, Ohio, United States
Corvette
1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
I think John answered your question here in post 4. But it sounds like John is saying that '67 and newer have this protection already.

Billy T,

Welcome to the CAC.

Tom
 
L

LUCKY13

Guest
Electrical breaker for 65

The part number at NAPA is 782-3039. It is a 150 amp breaker with a manual reset (no fuse).
 
L

LUCKY13

Guest
I'm trying to protect against a dead short. Several years ago, something happened (still don't know what) and my wiring between the switch and the starter was fried. This small breaker (1.5" X 2") is now mounted on my firewall between the battery and the starter. It will provide some protection for my wiring, should another short occur. It was inexpensive and it may never help me but it feels good for me to know it's there.
 

Pseudomind

Well-known member
Joined
Mar 9, 2005
Messages
668
Location
Jacksonville, FL
Corvette
2002 MY Roadster
And if done right could serve as a simple method of a simple anti-theft device, park,open the circuit, no start.

:upthumbs
 

paul67

Well-known member
Joined
Mar 2, 2003
Messages
1,113
Location
Ontario, Canada
Corvette
1974 convertible
I'm a little confused as well. What on the car can generate 150 amps? My alternator is 37 amps.
 
L

LUCKY13

Guest
During the actual "starting process" the amps are high, hence the large size of the battery cables.
 

paul67

Well-known member
Joined
Mar 2, 2003
Messages
1,113
Location
Ontario, Canada
Corvette
1974 convertible
Thanks. I missed the obvious! My battery is 850 CCA (cold cranking amps). Do you have a pic of the breaker?
 
Joined
Jan 1, 2002
Messages
7,246
Location
Washington, Michigan
Corvette
'67 Marina Blue Convertible
I'm trying to protect against a dead short. Several years ago, something happened (still don't know what) and my wiring between the switch and the starter was fried. This small breaker (1.5" X 2") is now mounted on my firewall between the battery and the starter. It will provide some protection for my wiring, should another short occur. It was inexpensive and it may never help me but it feels good for me to know it's there.

A 150-amp breaker between the battery and starter will trip the first time you start the car - the starter will draw from 250-400 amps when cranking. The circuit you REALLY want to protect is the 10- or 12-ga. main power feed from the battery (at the starter solenoid battery cable stud), which feeds the horn relay (which is the main power junction for the whole car). That's the wire that has the fusible link from the factory starting in 1967. That big breaker at the battery won't keep any harness from frying - with a dead short, they'll melt long before the breaker sees anywhere near that kind of current - that's what the fusible link protects from happening.

:beer
 
L

LUCKY13

Guest
I just completed a complete rebuild on the engine and I've started it 15 -20 times without the breaker tripping. I'm just an ordainary guy who likes old cars. I never worked for Zora either. I'm trying to help whoever I can on this site, even though I'll never claim to be an expert at anything. Sorry if I ruffled your feathers John.
 
Joined
Jan 1, 2002
Messages
7,246
Location
Washington, Michigan
Corvette
'67 Marina Blue Convertible
I just completed a complete rebuild on the engine and I've started it 15 -20 times without the breaker tripping. I'm just an ordainary guy who likes old cars. I never worked for Zora either. I'm trying to help whoever I can on this site, even though I'll never claim to be an expert at anything. Sorry if I ruffled your feathers John.

No ruffled feathers here at all - just trying to understand your setup. :)

:beer
 

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