Generator to Alternator: Which One?

SNKR770

Member
Everyones been really helpful. Thanks! The generator busted on me and instead of putting another one back in I'm thinking I should switch to an alternator. I've read a few articles but no one seems to call out a specific model. Could someone post which specific one will work as well as any pointer for things to really watch out for so somehting else does not get screwed up.

Thanks in advance.
Ryan
Twin Cities
Wht 64
 

Tedredamphi

Platinum Subscriber
I installed GM alternator similar to Peter's but used a NEW (NOT REBUILT) marine version with spark screen. Bought mine online from DB Electrics $70. Was even able to wire it to operate the charge light.
Ted
 

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SNKR770

Member
Any chance someone could be more specific on the model number of a GM alternator that they have used. I've decided to go this route. It appears from the pictures the one used is a 7127 model, which is 70 amps. Has anyone found one that is lower amps? Is it necessary to use one with such high amperage? Then again is there any harm in having to much? There was one I found yesterday at the parts store that is for a 70's jeep that is 37 amps?
 

PeterP

Member
I believe that the amperage rating is for maximum output. There is no harm in having a higher rating. It just means that your lights won't dim when you have the bilge blower, bilge pump, wipers, and radio going.
 

TORTAK

New Member
I put an Alternator in my car last year, I bought it from AutoZone part #DL7127M. I told them I wanted one for 1980 GMC Jimmy. $44.99. I also made some brackets to replaced the top adjusting one and an adapter piece for the bottom. I have 10 of them made up if you want a set let me know, I sell them for $35.00+shipping.
 

Ed Price

Member
I have a write-up on converting an Amphi to use the Delco 7127 alternator.
(I bought a fancy all-chrome 7127 on eBay. <g>) Send me an email
(edprice@cox.net) and I'll email the MS Word document back to you.

The 7127 has a built-in electronic voltage regulator, so you can wire in the
7127 by bypassing or eliminating the old Amphi mechanical voltage regulator.
The 70 amp capacity of the 7127 is simply its maximum capability; it
automatically adjust to supply whatever your Amphi electrical system needs
at any given moment. It only takes a few amps to run the ignition and
gauges. Turning on the headlights draws about 10 amps, a super Rule bilge
pump is about 8 amps, and the Amphi blower is a bit less than that. Thus,
even with two bilge pumps running, blower on, and headlights on, you would
not be taxing the 7127 at all. The 7127 is a very generic and common GM
alternator, and will probably last longer than anything else on your Amphi.


Ed Price
El Cajon, CA USA
WB6WSN
61 Rust Guppy
1987 MB 420SEL






_____

From: SNKR770 [mailto:]
Sent: Thursday, June 04, 2009 6:20 AM
To: edprice@cox.net
Subject: RE: [General Amphicar Discussion-t-20443] Re: Generator to
Alternator: Which One?


Any chance someone could be more specific on the model number of a GM
alternator that they have used. I've decided to go this route. It appears
from the pictures the one used is a 7127 model, which is 70 amps. Has anyone
found one that is lower amps? Is it necessary to use one with such high
amperage? Then again is there any harm in having to much? There was one I
found yesterday at the parts store that is for a 70's jeep that is 37 amps?
 

SNKR770

Member
Thanks to all those who replied. I'm armed with enough info to tackle this project this weekend. Eleectronic Ignition is next. What part number will I use?

Kind Regards,
Ryan
 

Midwest Amphicar

Worlds Largest Amphicar Destination
Hey Tortak, Knowing you I am sure your brackets are excellent. How about a pic? Then set aside three sets. Thanks Dave the Wave. PS Thank the Brown Wonder for the GM alternator.
 

jfriese

Active Member
Hello,

Here's a photo of my Amphicar with a Lucas alternator and stock Triumph mounts. It looks factory correct and is an easy install on negative ground converted cars. Practically "Plug and Play".

John Friese
67 White
67 Red

 
I got a set last summer. Real nice! Looks like a factory retrofit, even has the engine lifting eyelet like the original one.
 

TORTAK

New Member
Here's some pictures of the alternator mounting parts. I'm also working on some propeller nuts. I'm waiting for Mike L. to bring me a new propeller to check the color, I think it might be to white.

Tony In NH

Hey Tortak, Knowing you I am sure your brackets are excellent. How about a pic? Then set aside three sets. Thanks Dave the Wave. PS Thank the Brown Wonder for the GM alternator.
 

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Midwest Amphicar

Worlds Largest Amphicar Destination
Does it include lower mounting bolt? Email me at dmd@essex1.com. With an address and total amount to send. I will also be sending out the "secret" part to be made up. Thanks Dave the Wave
 

PeterP

Member
Here's some pictures of the alternator mounting parts. I'm also working on some propeller nuts. I'm waiting for Mike L. to bring me a new propeller to check the color, I think it might be to white.

Tony In NH

Those look really nice! I'm jealous.
 

CapnJohn

Amphi Guru & Former IAOC President
Thanks to all those who replied. I'm armed with enough info to tackle this project this weekend. Eleectronic Ignition is next. What part number will I use?

Kind Regards,
Ryan
Ryan - Use pertronix LU142AP12 or LU142AP12 just leave off the "P" for neg grnd. Get the reccomended Flame thrower coil by Pertronix too.

Your Alt should put out more than less. It only will put out what the reg tells it too. More is better, it insures your engine will have power to run if the battery fails.
 

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