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06-09-2024, 07:47 PM | #1 |
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Location: Dallas Texas
Posts: 3,113
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Re: Load and heat
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I placed the 3 electric fan leads along with the Alt lead on the same lug in the middle of the bar and distributed the remainder on the other lugs. This changed things for the better in terms of how the system reacts to high draw fans kicking on and the in dash volt gauge now reads much closer to actual at-the-battery volt readings. This gauge thing may have been the result of changing the 4AWG batt to bar cable to 2AWG. Thanks again, -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
06-30-2024, 08:57 PM | #2 |
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Location: Houston, Texas
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Re: Load and heat
are the terminals on the wires crimped properly? if not, that could be causing the issue.
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07-01-2024, 03:16 AM | #3 | |
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Re: Load and heat
Quote:
I’m no expert but these are all 10 and 12 gauge with crimped terminals. I used appropriate sized noninsulated ring terms and tried to curl the seam down into the wire strands with the right crimper. Shrink wrap. Shoulda soldered the big ones. Next time I’m there I’ll check the heat at those connections. Thanks! -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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07-01-2024, 09:06 PM | #4 |
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Re: Load and heat
Pictures?
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72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks... |
07-02-2024, 11:24 AM | #5 |
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Location: Colfax-California
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Re: Load and heat
Under hood temps this time of year I'm sure will approach the 200+ degree mark. If you are below the AMP rating of the bar I wouldn't worry about it as long as everything is crimped, soldered and tight. Which buss bar bar are you using?
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07-03-2024, 07:41 PM | #6 |
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Location: Dallas Texas
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Re: Load and heat
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This is the one I have installed. It is about 7" long and beefy. https://www.summitracing.com/parts/qdb-568102 -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
08-11-2024, 07:05 PM | #7 |
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Location: Dallas Texas
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Re: Load and heat
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OK well I've found the limit on my electrical system at idle. 103 outside temp while idling, my system lags bad. I can hear the interior fan slow and if it were at night I'm certain I would have seen my lights dim. Going neutral and raising the RPM to 1100 or so remedies the situation...mostly. I'm sure it's a combination of engine compartment heat and either an alt that can't handle the load or the lead wire off the alt to the bus that isn't big enough. I estimate 70 to 80 amps were being demanded on the bus bar when things went sort of south as described above. My 140A alt should be OK but I can't find an idle output spec for it so ~maybe~ not. It's single post has a 6AWG wire going into a 10AWG fusible link to the bus. I'm wondering whether 6AWG is enough. According to the wire chart, it ~might~ but without the really high operating temp accounted for. I would like to update the alt to bus wiring to 4 or even 2 gauge to just make sure. The run from alt to bus is about 4ft. What are your thoughts? Thank You! -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold Last edited by weq92f; 08-12-2024 at 10:51 AM. |
08-12-2024, 11:25 AM | #8 |
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Re: Load and heat
Somebody famous once asked the above....I'm asking for pictures of YOUR set up that you actually have under the hood.
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72 K20 Custom Camper, D60, 14BFF, full roller 406 TPI w custom built ECU and yes..it has tow hooks... |
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