Big 3 Upgrade: Planning Stage (Input Encouraged)

[Slick]

I have lots of time :) Want some of mine? Lol. At least the problem is theoretically solved. Good luck with the reinstall. I check this thread every 4 or 5 hours lol

[The Architect]

Got the alt put in yesterday finally. It works so far at least as well as the OEM.

I need to get a clamp meter and load test it. It charges at 13.8 - 14.2/3 like the stock alt which was expected

Had to extend the OEM Alt to Batt probably 8 inches and same goes for that black connector but no biggy.

Took me about 3 hours from start to finish.

heres a couple crappy phone pics until i use my camera later today.

[Slick]

Hurray!!! She is a success :) :holds breath for load test: Looks like it fits perfectly. As good as stock? No rubbing issues anywhere? Just extend the wires and them good to go? Very nice man, very nice.

[talnlnky]

a very unscientific method of testing the new alt would be to put a sine wave cd in there.... play something like a 50hz tone at moderate volume (doesn't have to be full blast), and while you do that.... have a DMM set to voltage monitor the voltage drop...

on the stock alt... if you push more than 500rms you should start to see a decent voltage drop... on the new alt.. since it's about 4 times bigger... should take more like 1200-1500rms to see the same drop...

Keep in mind... the alt may take a half second to respond to the new load.


Clamp meter is scientific tho... I would love to own a clamp meter.
Clamp + DMM and you can tell how much power your alt puts out (in watts). Add and Oscope and you can tell how much power your amp puts out before clipping.

[The Architect]

yea im going to have to find someone to help me do the volt test because i dont have an internal volt meter yet, 2 are on the way.

And to slick, the install is really quite easy and the fitment was very good. Extend the OEM wire 10 inches to be safe and the black connector the same and youre good to go.

Before I was dropping about .3 volt when it was hitting pretty good, there was a nice rumble throughout the seat and headrest and the visors were flapping a little bit. it would go from 14.3-14.07 or 13.99 for example

There are no retail stores that have a Clamp that measures DC Amps so I have to resort to online shopping or find a shop

[The Architect]

i found a pretty decent clamp meter rated for 400A DC Current on the cheaps and will be ordering it tonight. Once i get it ill do full on test for this alt.

[awdblazer]

get a good quality clamp on, actually dont get cheap shit when it comes to meters, trust me i am a electrician and the better the meter you have the safer you are and cheap meters are exactly that cheap and not accurate

[The Architect]

the meter itself isnt cheap but the price i found was. i showed iraggi and he signed off on it and its rated for what i need etc etc. We'll see if this alt is all it needs to be

[awdblazer]

only two names i would ever touch, fluke and amp probe

[talnlnky]

Originally Posted by awdblazer

only two names i would ever touch, fluke and amp probe

doesn't fluke rebadge a lot of its meters for other companies tho???

[The Architect]

both are pretty expensive and the flukes are really expensive, i just need to know that the alt is putting out at least 75% of what it says

[ricepower]

[The Architect]

just for a slight mini-update i threw a DMM on the amp while driving and while idle (at stop lights etc) and proceeded to play bass heavy rap music with lines around the 38-45hz range (ying yang twins etc)

While driving around 40-45mph the voltage was about 14.20-14.24 and would drop to about 14.12 and sometimes 14.08 without pretty damn loud bass as far as my amp and subs are concerned.

Before the HO alt although I did not take records the voltage would drop maybe 3-4 times as much at least in similar situations.

I do however have one thing to ask of a fellow yarisworlder, I would like someone to monitor the voltage at a complete idle stop that lasts for at least 20-30 seconds with no load. Preferably while driving around town and at a stop light or sign

The reason for this is the HO alt will hover around 13.13-13.30 (ill reconfirm) at dead stop idle and I want to contrast this to a real world situation with the stock alt.

just an overview of numbers for whoever wants to know with the HO alt.


Idle in Drive: 13.20 - 13.30
Idle in Park: 13.44 - 13.50
Idle in Neutral: Nearly same as in Park
Driving after warmed up: 14.17-14.23 +- .07 volts
Highway Driving: Same as above

[Slick]

At 65 mph my SGII says about 13.7 - 13.8, no extra load. Help any lol

I have a quick question. What would it hurt for me to get a 300 A alt and not have a system that can really use it? Anything?

[The Architect]

well for one i dont even know that my alt will do 300A, I personally dont think it can or will just because that would be an absolutely amazing feat.

Also I have no way of presenting a load of 300A or even 200...or 150 for that matter. My amp draws maybe 70A full tilt and my A/C & Lights draw maybe 30 tops. So I could at idle test for maybe 100A through my clamp meter (that im still waiting for).

With that hard of a load im EXPECTING no more of a drop in voltage than .30 volts at idle otherwise ill be mad.

Anyways...I need to come up with a way to test amperage while highway driving and I know im suppose to test it right at the alt but ill consider just clamping it at amp and having someone ride with me, we'll see how that works out.

What does your SG2 show for voltage at idles/stops?

[sqcomp]

I see you're getting some time on this alty.

What are your thoughts of the performance so far? Is it worth the money? Would you buy from Iraggi again?

[The Architect]

so far the only thoughts i have arent very scientific ones.

The voltage does seem to drop far less with far more bass which is a good sign but I'm hesitant to believe it could ever put out 300A but thats a personal biased thing.

i need to have a way to present a load of at least 250A to the alt while highway driving with a voltage drop of NO MORE than .5 volts to be content.

Who wants to loan me a 2500+ Watt amp?

[The Architect]

Also, Is the factory Alt to batt wiring a straight shot through the loom to the battery? If so Im going to just cut the connector off the stock wiring and crimp it back on to a new run of 4 gauge back to the OEM batt. loaction and call it a day.