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post #1 of 26 (permalink) Old 04-28-2010, 03:41 AM Thread Starter
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Are Dual Alternators Possible?

On a 97 4.6, do you guys think it's possible to add a second alternator to these cars? I see several Mark 8 alts mounted backwards on the lower drivers side. Are these done with a special bracket and if so, would it work on a non-supercharged car?

Is there any info here on relocating the coil packs?
I'd love to move them to the rear.
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post #2 of 26 (permalink) Old 04-28-2010, 07:02 AM
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I've seen some interesting things done on cars with no room for a second alt, like mounting it under the car and running it off of the drive shaft. I forget how it was connected though, but it was neat.

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post #3 of 26 (permalink) Old 04-28-2010, 09:14 AM
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Why would you want 2 alternators?

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post #4 of 26 (permalink) Old 04-28-2010, 09:49 AM
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Why would you want 2 alternators?
Power for a "BOOM" box I bet

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post #5 of 26 (permalink) Old 04-28-2010, 06:04 PM Thread Starter
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Yeah, no one makes a big enough alternator for my needs so the answer is to run two smaller ones.
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post #6 of 26 (permalink) Old 04-28-2010, 06:10 PM
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Why don't you get a 200amp alt and put in an extra battery?

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post #7 of 26 (permalink) Old 04-28-2010, 06:15 PM
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Why don't you get a 200amp alt and put in an extra battery?
X2 that sounds much easier to me

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post #8 of 26 (permalink) Old 04-28-2010, 10:31 PM Thread Starter
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Why don't you get a 200amp alt and put in an extra battery?
It's not enough. I need 350-400 amps to power my 4 batteries.
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post #9 of 26 (permalink) Old 04-28-2010, 10:43 PM
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Alternators do not power batteries they charge them, what kind of power r u running to think you could possibly need that much???

IMO u would need to be running at least 10,000 watts to need 350 amp alternator

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post #10 of 26 (permalink) Old 04-28-2010, 11:04 PM Thread Starter
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Some people are fine with a drop of several volts in their sound system, but I want to maintain 14v and higher under heavy usage. And yes, it is a big system.

Will an alternator work properly if it's rotation is backwards? If not, what needs to be changed internally to make it work?
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post #11 of 26 (permalink) Old 04-28-2010, 11:14 PM Thread Starter
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Some people are fine with a drop of several volts in their sound system, but I want to maintain 14v and higher under heavy usage. And yes, it is a big system.

Will an alternator work properly if it's rotation is backwards? If not, what needs to be changed internally to make it work?

Besides, it's not like I'm asking why anyone would possibly need to supercharge a 4.6 when they make plenty of power in stock form. Some people are just not satisfied with a little. We need "excess" and "ample". Lol

Last edited by JasonWW; 05-29-2010 at 09:54 PM.
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post #12 of 26 (permalink) Old 04-28-2010, 11:20 PM
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I've hear that iraggi makes 350-450 amp alternators might want to check that out!!

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post #13 of 26 (permalink) Old 04-28-2010, 11:53 PM Thread Starter
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I've hear that iraggi makes 350-450 amp alternators might want to check that out!!
I'm pretty sure that level of output would require a larger case. The biggest they show for a 4.6 tbird is 260 amp.

Besides, I'd rather have a pair of 200 amp alts than a single 400 amp because they will put out more power at lower rpms compared to the single big one.

Doesn't anyone have any pictures or info on how they relocated their alternator?

Last edited by JasonWW; 04-29-2010 at 12:53 AM.
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post #14 of 26 (permalink) Old 04-29-2010, 07:30 AM
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I've seen some HEAVY systems just using a 200 amp alt, 2 red top batteries, and 2 caps and thats more than enough to power heavy hitting bass.

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post #15 of 26 (permalink) Old 04-29-2010, 08:15 AM
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Iraggi is crap, his alternators are all stock, they are just desoldered and wired differently.

you can get 300A in a regular size case from DC Power, those guys are legit.

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post #16 of 26 (permalink) Old 04-29-2010, 08:21 AM
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I'm pretty sure that level of output would require a larger case. The biggest they show for a 4.6 tbird is 260 amp.

Besides, I'd rather have a pair of 200 amp alts than a single 400 amp because they will put out more power at lower rpms compared to the single big one.

Doesn't anyone have any pictures or info on how they relocated their alternator?
I would be thinking how to get a larger case alternator in place on the stock one.
You won't see any pics of an MN12 with dual alternators, well, cause, there really isn't one....at least none that I have seen on this site.

Get the dimensions of the oem alternator, and get the deminsions of a larger case, and start comparing.

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post #17 of 26 (permalink) Old 04-29-2010, 10:01 AM Thread Starter
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You won't see any pics of an MN12 with dual alternators, well, cause, there really isn't one....at least none that I have seen on this site.
I was asking for pics of relocated alternators. Pretty much all the roots type supercharger guys had to relocate their alternator because the supercharger snout come out right there.
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post #18 of 26 (permalink) Old 04-29-2010, 12:51 PM
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are you seeing the relocated alt. on stains or thundercocks? cause there a lil different as far as clearance alt size and location atleast as far as the sn-94 and the mn-12.

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post #19 of 26 (permalink) Old 04-29-2010, 01:03 PM
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The 2V roots blowers (AED/Tork Tech/Saleen/SVO/Roush/ect...) have the alternator mounted in the same place as stock, only they may be flipped around on the stock block mounts(AED, TorkTech) or set at an angle with a custom bracket to clear the blower snout.

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post #20 of 26 (permalink) Old 04-29-2010, 07:36 PM
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you could probably only do it with a custom bracket(at great cost no doubt) and having the second alt mounted at the bottom of the engine somewhere, maybe even in place of AC or something.

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post #21 of 26 (permalink) Old 04-30-2010, 03:05 AM Thread Starter
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The 2V roots blowers (AED/Tork Tech/Saleen/SVO/Roush/ect...) have the alternator mounted in the same place as stock, only they may be flipped around on the stock block mounts(AED, TorkTech) or set at an angle with a custom bracket to clear the blower snout.
Perhaps I can run 2 alts face to face in the stock location or just add a second where the drivers side coil is located. Will they work fine rotating backwards?
I can fabricate my own brackets.

Here is a 4G alt reverse mounted.



And here is a 3G alt.


Last edited by JasonWW; 05-29-2010 at 09:56 PM.
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post #22 of 26 (permalink) Old 05-01-2010, 12:49 PM
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I can't wait to be stuck at a red light next to this guy being forced to hear music I don't want to hear louder and louder each day as his hearing dies just a little more.

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post #23 of 26 (permalink) Old 05-01-2010, 10:35 PM Thread Starter
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I can't wait to be stuck at a red light next to this guy being forced to hear music I don't want to hear louder and louder each day as his hearing dies just a little more.
Why so quick to judge? Winger rocks man!

I was also thinking dual alternators would be great for two seperate battery systems. I could keep the stock 130 and battery under the hood and then add a 200+ amp alternator to power multiple batteries in back. Since it doesn't have to power the car, all 200+ amps will go to the sound system. Keeping them isolated has many advantages.

Last edited by JasonWW; 05-02-2010 at 07:11 AM.
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post #24 of 26 (permalink) Old 05-02-2010, 01:07 AM
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He He I @ 42.5 yrs old just put together a stereo system than costs more than my Bird did.I want to be able to retaliate with the 80's rock of my choice @ will.

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post #25 of 26 (permalink) Old 05-02-2010, 09:50 AM
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Hello

I can think of 2 ideas.
Relocate the Power steer pump to the rear pinion, Like on race cars.

Or custom set-up with an electric motor powering your 200+ alt
You can place anywere in the car. Maybe close to your rear batteries.

Also for more power go with an old school alt. you can get an adjustable external regulator. These alts can put out almost 16V if hot wired at the reg.


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post #26 of 26 (permalink) Old 05-02-2010, 10:22 AM Thread Starter
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Hello

I can think of 2 ideas.
Relocate the Power steer pump to the rear pinion, Like on race cars.

Or custom set-up with an electric motor powering your 200+ alt
You can place anywere in the car. Maybe close to your rear batteries.

Also for more power go with an old school alt. you can get an adjustable external regulator. These alts can put out almost 16V if hot wired at the reg.

Wouldn't adding a Mark 8 alt like in the picture I posted be much simpler?
I can make a bracket and get a longer belt. I just need some info on how it's already been done by the supercharged guys.
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