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Old 08-11-2022, 06:33 PM #31
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Originally Posted by JoeT4R View Post
So that would lead me to believe that it is normal for that to happen then. I sometimes have my radio on, sometimes I don’t. I wonder why Toyota designed it this way if that would happen?
Because the battery still charges the rest of the time you are driving, and it isn't discharging while you are sitting there with those voltages. Why overspec the alternator? That's just more cost from Toyota's perspective.

I have a similar alternator (80A Denso) on my 3s-gte Camry (sadly, not enough the same that the 95/105 options from the Suzuki could swap). I can get it to drop down under 11V with everything on at idle (headlights, brake lights, turn signal, high-current rad fans, etc.). Still charges the battery just fine once above about 900-1000 rpm. My 4Runner isn't quite as bad since it has the clutch fan instead of electric fans.

-Charlie
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Old 08-11-2022, 09:37 PM #32
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Originally Posted by phattyduck View Post
Because the battery still charges the rest of the time you are driving, and it isn't discharging while you are sitting there with those voltages. Why overspec the alternator? That's just more cost from Toyota's perspective.

I have a similar alternator (80A Denso) on my 3s-gte Camry (sadly, not enough the same that the 95/105 options from the Suzuki could swap). I can get it to drop down under 11V with everything on at idle (headlights, brake lights, turn signal, high-current rad fans, etc.). Still charges the battery just fine once above about 900-1000 rpm. My 4Runner isn't quite as bad since it has the clutch fan instead of electric fans.

-Charlie

Couldn’t have said it better myself. I did put a smaller pulley on my 70a Alt and now it pushes a solid 45a at 600rpm. I also put LED brake lights in to ease up on the load when I’m on the brake at 600rpm.


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Old 08-12-2022, 09:40 AM #33
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Quote:
Originally Posted by 19963.4lsr5 View Post
Couldn’t have said it better myself. I did put a smaller pulley on my 70a Alt and now it pushes a solid 45a at 600rpm. I also put LED brake lights in to ease up on the load when I’m on the brake at 600rpm.


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I really like the smaller pulley idea. As your overcoming the idle charging issues in our 3rd gens.. Thus creating more amperage. The next obstacle is the temperature issue.

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Old 08-12-2022, 10:06 AM #34
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My Alt at 750rpm will push 55-56a. Tested yesterday on my way home from work. It’s the 70a with the smaller pulley.


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Old 08-12-2022, 04:33 PM #35
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Quote:
Originally Posted by 19963.4lsr5 View Post
My Alt at 750rpm will push 55-56a. Tested yesterday on my way home from work. It’s the 70a with the smaller pulley.


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Nice...

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Old 11-28-2022, 08:11 PM #36
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Hey guys,

A few thoughts. first, my status. As best I can tell, my problems originated from the pos cs144 alternators. They weren't charging well and my battery was damaged. putting a solid alternator in just exaggerated the battery's death.

I redid my positive wire from alternator to battery. I also redid all grounds. i'm starting to find having a plusnut tool is the bomb!! Now that there's a new battery, I'm not having any problems. Battery stays charged. There's no corrosion on any contacts after a few months and there's no battery gassing.

On to a few other topics discussed. My understanding of amps is that, provided there aren't any issues with the alternator, amps decrease substantially as the battery gets to the fully charged state. So regardless of the alternator's potential or max output, it's not putting that out at all times. I only see this happening on the rare occasion I need to winch. I don't really wheel. But I do travel solo from time to time. Got stuck ONCE. Never again.

As for the wiring to the fuse box, again, my understanding is that you wire/fuse for the draw. I'm not drawing anything of any additional import. I have a stereo and amp and that's about it. They've been in the truck for 24 years. No issue. No aftermkt light bars or accessories that would be considered a big draw. I like keeping my 4r looking close to stock but for a small lift. So there's no reason I should need to boost the wiring to a fuse box that isn't any more tasked than a completely stock vehicle.

Look at it this way, couldn't you add a 12awg to the battery to power something small? Of course, as long as the 12awg is suitable for the DRAW, it's not a problem. I believe the same applies here. I maintained the same gauge when I extended the fuse box wiring. I have no concerns here. The battery is only going to put out what is drawn from it. all large gauge wiring is oversized, uses FTZ lugs/crimper, are double crimped and incorporates adhesive lined shrink wrap.

Appreciate everyone chiming in. Hope everyone has a safe and happy holiday. I'm on to my next set of projects:

1. new tires. sticking w 265/75/16 but going back to load range C as I won't be towing a trailer much longer and I really think this was the main contributing factor to my mileage dropping around town a bit. still got 21mpg on my recent trip to ouray, co.

not sure if this (tires) is why my steering is sticky going around corners from time to time (it's not persistent). tread is starting to get a little low. it has a new steering rack, new ps pump and reservoir (all oem) and the fluid is relatively new. So not sure what else it could be. it's a relatively recent thing. any thoughts appreciated.

2. axle swap (new seals) and rear 4:30 elocker (overhauled by zuk)
3. brand new front elocker and a re-gear to 4:30 (fr 4:10) (zuk's the man!)
4. new front differential bushings
5. new oil cooler seal
6. drop oil pan and redo the seal
7. new door actuators all the way around. had an interesting thought here. I think I'm going to put a switch inline to the rear door actuator so I can disable it. this would likely stump any thief trying to get into the rear cargo system I'm planning to build. If you can't unlock the door via the powered lock/unlock button and you don't have a key, you're probably going to move on to an easier target. If you can't open the door, you won't be able to access the cargo draw's content without a heck of a fight.

8. attach a kickass shower tent. got their little lithium powered shower head too. looks like a great compact system. i may double it's use as a sink faucet.
9. install and plumb a ironman 4x4 13gal water tank against the back seat. it will sit betw the back seat and the cargo system I'm building. the cargo system is going to straddle the wheel wells. the single draw will hang below that. I don't see a need to have a box inside a box. one draw w/ oversized slides. i'll route out the inside walls a bit to incorporate draw dividers in a number of configurations. the front of the draw will double as a table w/ two piano hinges thus allowing it to unfold twice the height of the draw. should create plenty of table top space and i'll be able to adjust it easily so it's always a level cooking surface. i'll be able to pull the draw out while still using it as a table to get at whatever. i can't think of a lighter, simple design. i've read A LOT.


10. fix or replace the windshield fluid tank
11. install the rad rubber liners I've been sitting on for a year
12. extend the manual transmission breather up into the dash
13. extend the breathers in the engine bay (already did the rear diff breather long ago)
14. rewire the radar
15. spare belts and a LBJ

....and head down to baja for a few weeks to celebrate it's completion.

I LOVE this truck. Bought new. Still no rust. Love'em and they'll love you back for a long, long time.

Really appreciate this community.
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Old 11-28-2022, 10:03 PM #37
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Electricity travels on the outside of wires on the surface through the electrons of atoms. Ts how the energy flows.

You understanding it though. On circuits you are correct on fuses. You always create the circuit to just be slightly less the the fuse so the circuit burns the fuse.

Here were gets interesting. The LED are diodes. So they only let current flow on direction.

This is way the high beam indicator etc will not work.

What's concerning me is that in certain situations. These led in circuits wil not let the fuse burn properly .

This is why on occasion we are seeing dash burn up because the circuits are designed for this.

The only workaround are leds that are resistive loaded or resisters in the circuits to have the circuit function as it should.

Anyways, what you can do is always jump a wire gauge up one or 2 sizes then the current load of your circuit then just put the proper fuse in. This way it will burn the fuse before starting to heat up and melt your wiring. Plus only a few amps above your maximum current capacity.

This is why Voltage on fuses isn't as important. The fuses just burn open to protect other things. As that's their purpose in the circuits


I hope this helps in your understanding of your project.



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Old 11-29-2022, 02:20 PM #38
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Electricity travels on the outside of wires on the surface through the electrons of atoms. Ts how the energy flows.
This is only true at high frequencies (think radio, etc.). Multi-stranded wire for DC applications is for flexibility and vibration resistance, not extra surface area. Static applications - AKA home wiring - is solid conductor because it is cheaper and doesn't move once installed.

-Charlie
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Old 11-29-2022, 02:47 PM #39
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Originally Posted by phattyduck View Post
This is only true at high frequencies (think radio, etc.). Multi-stranded wire for DC applications is for flexibility and vibration resistance, not extra surface area. Static applications - AKA home wiring - is solid conductor because it is cheaper and doesn't move once installed.

-Charlie
I am not sure about that one. Granted your are right on the DC multi stranded being for flexibility and vibration.
I theorize that it travels on the surface area of wires wither they are stranded or or solid would be application and I am not the only one on this theory as it has to push the valance electrons down the wire.

Current isn't concerned about wither its AC or DC. Its the flow of the electrons that matter. This is why with higher amperage loads, you need thicker larger diameter wires.

If the surface area or size exceeds the wire fuse amperage level what happens? It melts and opens up the circuit. Fuses are just melt-able links that are supposed to melt when the amperage exceeds the specified rating.

Granted temperature and resistance need to also be considered.

Could that particular theory be wrong.. possible but mostly when wires melt down the first that goes is the insulation then the wire itself which is due to heat resistance of materials used.

Plus they also seem to you really look closely burned from the outside in thus is to why I think this theory is correct. :-)

And Yes I know this Theory goes against the grain and everything says otherwise. As the standard has more surface area then the solid and this is why its a Theory. As solid wire is can't take heat then stranded can either.

So its possible its a bad theory and that does need to be mentioned on here so thanks Charlie.. :-)
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Old 11-30-2022, 03:14 PM #40
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Plus they also seem to you really look closely burned from the outside in thus is to why I think this theory is correct. :-)
Burning, aka oxidation, happens in the presence of oxygen - it HAS to happen from the outside. Otherwise, it is just melted metal that reforms exactly the same once cooled off.

Beginning info:
Skin effect - Wikipedia

There's a lot to it. AC vs. DC has a definite difference in effect in conductors. (I'm an electrical engineer...)

-Charlie
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Old 11-30-2022, 04:01 PM #41
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Originally Posted by phattyduck View Post
Burning, aka oxidation, happens in the presence of oxygen - it HAS to happen from the outside. Otherwise, it is just melted metal that reforms exactly the same once cooled off.

Beginning info:
Skin effect - Wikipedia

There's a lot to it. AC vs. DC has a definite difference in effect in conductors. (I'm an electrical engineer...)

-Charlie
So am I.. AC and DC sure do.. Just like which way does current flow positive to negative or negative to positive?

I just like to not except everything as gospel. Its just my nature. I will stick to the norms in the forum though for simplicity.

Thanks for the clarification.. :-)

The oxidation causes the resistance to increase thus starts the heat. Once the heat starts its only the matter of time before they melt down.

I am just waiting for it all to change. :-)
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