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1
Post By patrickt
11-05-2018, 09:38 AM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
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Relays
Went to C&C last Saturday and my Fuel Pump relay went wonky.
The 'REC' ones lasted between 7-9 years.
What are you guys using for relays? I know the yellow box Bosch (German/Austrian) relays are good but their new ones are Chinese, not to mention no-name brands. And some even have a big ugly tab on them.
Also, there are 'double throw' relays. Do our cars use those? I suppose I could look at the wiring to see but that makes my neck hurt 
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rodneym
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11-05-2018, 11:49 AM
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
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Just wire two relays in parallel for redundancy in case one fails.  That's really easy to do, not like my pusher fan project. |
11-05-2018, 12:08 PM
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,389
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The real advantage to the addition of a relay for the fuel pump is to make the power wire for the pump as short as possible and not needing a large gauge wire running from the rear of the car to the dash and then back. A simple on/off relay is all you really need. Mount the relay in a base mount and carry a spare if you like. I have mine in the trunk. Maybe 3’ of wire total. I took power from the batteries maintenance cutoff switch terminal which is also mounted in the trunk. Use your existing dash mounted pump switch to energize the relay.
Blas
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Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, & Cinema Tribute Cars.
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
Last edited by Blas; 11-05-2018 at 12:27 PM..
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11-05-2018, 02:31 PM
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Full Blown Member
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Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
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Pat - Where's Chas when you need him?
Blas (not to be confused with Chas) - I appreciate the suggestion but I'm going the keep the wiring stock.
I opening the failed relay. Looked fine (no scoring). Tested fine. But replacing definitely did the trick.
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rodneym
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11-06-2018, 08:50 AM
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Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
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Correction, new Bosch relays are made in Portugal.
There are TYCO (Chinese) made relays that sometimes get sold as Bosch (so I've read).
The 0332109150 that Summit sells is the Portuguese Bosch, if anyone cares.
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rodneym
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11-06-2018, 12:51 PM
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Cobra Make, Engine: SPF#0760
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Why would I be confused with Chas?
FYI: You don't really need to cut any wires just add a small loop.
Blas
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Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, & Cinema Tribute Cars.
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
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11-06-2018, 01:07 PM
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I guess that was my lame attempt at some name rhyme humor.
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rodneym
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11-06-2018, 01:39 PM
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Join Date: Feb 2014
Location: White City,
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Cobra Make, Engine: West Coast, 460 CID
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Quote:
Originally Posted by patrickt
Just wire two relays in parallel for redundancy in case one fails. That's really easy to do, not like my pusher fan project. |
I installed relays in parallel when my old cooling fan relay quit. Peace of mind. Now I'm far less worried about watching my coolant temperature gauge climbing to 250°F. Again.
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Brian
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11-06-2018, 03:12 PM
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
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Quote:
Originally Posted by cycleguy55
I installed relays in parallel when my old cooling fan relay quit. Peace of mind. Now I'm far less worried about watching my coolant temperature gauge climbing to 250°F. Again.
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If rodneym would just listen to me his life would be infinitely easier and more manageable.  |
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