H.O. alternators?

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dzelaya18

Copper - Posts: 49

Joined: May 14, 2004

Posted: December 02, 2005 at 2:17 PM / IP Logged

While we're on this topic: If you have a 75amp alt. stock, and you upgrade to a 175amp alt., would that put you in danger of frying the stock charging harness and causing a fire?

ragoal12

Copper - Posts: 135

Joined: July 23, 2005

Location: United States

Posted: December 02, 2005 at 2:36 PM / IP Logged

audiobhan101 wrote:

Ya and its really really hard to find any thing for an 84 RX7. I have seen Iraggi Alts but I dont think he has any thing for an RX7. I need to find out what else will fit my car and go from there. Most mazda alts are the same but better to be safe than sorry.

i just recieved my iraggi alt today after waiting 3 wks for it and they sent the wrong one.. and now i'll have to wait for a week for him to respond to my email.. i wouldn't buy from him personnally i tried to save a lil money by buying from him and i should have just went with this company i found.. www.alternatorparts.com they might have somehting for an RX 7 if they don't have anything posted.. i would call cause they guy that runs the place is very helpful!!!!!

if you upgrade from a 75amp to a 175amp you will need to upgrade ur alternator lead wire... that is the only thing to worry about "frying" as the car pulls its power through the battery and it will only draw the needed current leaving the rest of the current to run your audio stuff

S.O.B custsoms.. South Omaha, Nebraska

sedate

Silver - Posts: 1,173

Joined: July 03, 2004

Location: Colorado, United States

Posted: December 02, 2005 at 2:38 PM / IP Logged

I'm not sure that is something you would wire only to the wiring harness. I wired my HO alt to the car with 4-gauge grounding it and running directly to the battery... I still connected my wiring harness but I imagine after all the 4-gauge it will see the harness as a higher resistance circuit anyway..

"I'm finished!" - Daniel Plainview

shaggy_one469

Member - Posts: 27

Joined: November 16, 2005

Location: United States

Posted: December 02, 2005 at 9:03 PM / IP Logged

well you guys have been helpful. thanx. another question. what size alternator should i get to run two mtx 81000d's (or later on, two mtx 81001's)and a 400x4 amp and still have enough output to run the rest of the electrical system?

geepherder

Platinum - Posts: 3,668

This member consistently provides reliable information

Joined: October 27, 2003

Posted: December 03, 2005 at 6:05 AM / IP Logged

Tell us the fuse ratings of your amps- that way we know the max current draw.

My ex once told me I have a perfect face for radio.

shaggy_one469

Member - Posts: 27

Joined: November 16, 2005

Location: United States

Posted: December 03, 2005 at 10:46 PM / IP Logged

150 amp in-line fuses for 81000d's. dunno about the 400x4 yet, i havent decided on one yet. and i need mids and highs. i will probably need help in that area too when the time comes.

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: December 04, 2005 at 6:17 AM / IP Logged

That sounds like those are the fuses on your power line. What size fuses are recommended for these amps, or do they have fuses on the outside- this should be in your manual for them.

My ex once told me I have a perfect face for radio.

shaggy_one469

Member - Posts: 27

Joined: November 16, 2005

Location: United States

Posted: December 04, 2005 at 7:34 PM / IP Logged

it says that it requires 150 amp external fuse. thats inline right? there is no place on the amp for fuses. it is working though. with 150 amp fuses at the battery end and the amp end of the power wire.

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: December 04, 2005 at 7:45 PM / IP Logged

Okay, then, you want an alt that can support that kind of demand, along with your other accessories- maybe 200a.

My ex once told me I have a perfect face for radio.

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H.O. alternators?

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