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Alternator size help


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Posted

I will be getting a soundqubed 3500.1 amp with a 380A inline fuse, so I need to know how big of an alternator I need to get.

02 Lexus IS300 (2JZ FTW)

Mids/Highs: JL Audio C5 6.5s all around

Mids/Highs Amp: JL Audio HD 600/4

Subs: four SA-8v2s in 3.8cubes @ 32hz

Sub Amps: SAZ3k

Battery: Huge Interstate Batteries relocated to trunk

About 80ft. of 1/0 OFC....

Head Unit: Pioneer 4200NEX

Posted

i got a 230 amp alt and kinda wish i went bigger so i would have room for a bigger amp down the line but i was to stoked and jumped on it before i really searched around

Posted

I probably won't upgrade my amp lol and not bare minimum. Just enough and then some, know what I mean?

02 Lexus IS300 (2JZ FTW)

Mids/Highs: JL Audio C5 6.5s all around

Mids/Highs Amp: JL Audio HD 600/4

Subs: four SA-8v2s in 3.8cubes @ 32hz

Sub Amps: SAZ3k

Battery: Huge Interstate Batteries relocated to trunk

About 80ft. of 1/0 OFC....

Head Unit: Pioneer 4200NEX

Posted

97 Nissan maxima

02 Lexus IS300 (2JZ FTW)

Mids/Highs: JL Audio C5 6.5s all around

Mids/Highs Amp: JL Audio HD 600/4

Subs: four SA-8v2s in 3.8cubes @ 32hz

Sub Amps: SAZ3k

Battery: Huge Interstate Batteries relocated to trunk

About 80ft. of 1/0 OFC....

Head Unit: Pioneer 4200NEX

Posted

its better to spend more money on alt and get less batteries in the trunk, since it's sedan car!

edit:

basically bigger is better

sometimes Loud is NOT pretty

Sounds like its safe to go ahead and bend that ass over.

Posted

its better to spend more money on alt and get less batteries in the trunk, since it's sedan car!

edit:

basically bigger is better

I agree with the above statement.

Chevelle%20Team%20Cover%20without%20RE%2

^Vehicle log to come soon for this.^

Posted

Would a 250Amp be sufficient?

02 Lexus IS300 (2JZ FTW)

Mids/Highs: JL Audio C5 6.5s all around

Mids/Highs Amp: JL Audio HD 600/4

Subs: four SA-8v2s in 3.8cubes @ 32hz

Sub Amps: SAZ3k

Battery: Huge Interstate Batteries relocated to trunk

About 80ft. of 1/0 OFC....

Head Unit: Pioneer 4200NEX

Posted

P(W) = V(V) × I(A)

power in watts is = to volts times amps

so re-arrange it to power/volts=amps

3500(watts)/(14.6Volts)= 239.73 AMP

so to answer your question, a 250 amp alternator will be sufficient, yessir

EDIT: unless you're running at 16V, which would be crazy. but if you were, just plug it into that equation, which would be : (since the site says it does 5300 @ 1 ohm on 16V) you would do: 5300/16 = 331.25amps.

2006 Monte Carlo

Pioneer DEH-80PRS

2 SSA ZCON 12's

5 Cube Box tuned to 32 Hz

Soundqubed 3500.1

PAC LC-1

Singer 320 Amp Alt

XS D3100 & Kinetik HC2400 in trunk

Super Start AGM Under Hood

80ft+ Sky High 1/0

40 ft^3 120mil sky high deadener

Soundqubed Pro Audio 6.5" mids

Soundqubed Super Tweeters

Alpine 1" Tweeters

Alpine MRP-F300

Posted

So 250A would work, I found a 250Amp USA alternator on eBay for $230, would that be a good choice or should I get Mechman, if I get Mechman, I'll bump up to the 270Amp version.

02 Lexus IS300 (2JZ FTW)

Mids/Highs: JL Audio C5 6.5s all around

Mids/Highs Amp: JL Audio HD 600/4

Subs: four SA-8v2s in 3.8cubes @ 32hz

Sub Amps: SAZ3k

Battery: Huge Interstate Batteries relocated to trunk

About 80ft. of 1/0 OFC....

Head Unit: Pioneer 4200NEX

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