Alternator Amps
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
One thing a lot of folks neglect is the cables themselves and ground connections, including the alternator itself to the block through the brackets. Any corrosion, often invisible is more than enough to cripple any alternator. It won't be noticeable at idle but under load it will choke. Charging systems must have clean and tight electrical connections throughout or the battery will never charge to 100% and alternator won't provide anywhere near the current it's rated for. Before swapping out OEM alternators check the voltage drop through grounds and positive cables. Be sure you're getting what you paid for.
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Fleet Mechanic
Joined: Aug 2005
Posts: 1,277
Likes: 89
From: MD
Might,might not. I have 2 fans,and big fuel pump on my Lightning and the the 95 amp was dipping to 12v at idle. A 130 amp was good.
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Laughing Gas
Joined: Feb 2017
Posts: 991
Likes: 6
From: San Antonio, Texas
What's the highest amp alternator that's a direct fit for our trucks, be it diesel or gas?
I don't mind running some thicker gauge wire to accommodate the increased juice, so that's not a big issue.
Mine had recently been replaced before I bought the truck, so I should be good for a while, but it looks like a parts-store rebuild or new unit, and we all know those tend to croak on diesels. Just posturing for the future
I don't mind running some thicker gauge wire to accommodate the increased juice, so that's not a big issue.
Mine had recently been replaced before I bought the truck, so I should be good for a while, but it looks like a parts-store rebuild or new unit, and we all know those tend to croak on diesels. Just posturing for the future
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Tuned
Joined: Jun 2005
Posts: 421
Likes: 1
I am wanting to wire in the electric Pusher fan to blow on the A/C condenser at HWY speeds the A/C works great but at stop or stop and go traffic not so we'll just trying get some more air blowing across the condenser during these times.
It would be great if I could figure out so it only kicks on at speeds lower than 30 MPH driving but baby steps for now.
I don't think the electric fan needs to be running at HWY speeds.
It would be great if I could figure out so it only kicks on at speeds lower than 30 MPH driving but baby steps for now.
I don't think the electric fan needs to be running at HWY speeds.
Laughing Gas
Joined: Oct 2014
Posts: 1,227
Likes: 4
From: Washington
To be honest anything in front of the radiator is going to do more harm than good.
Some standard questions when it comes to cooling performance:
What is the condition of your fan shroud? Do you have a fan shroud?
Does the fan clutch work properly?
Does your A/C system need to be serviced anyways?
Are the fins straight on the radiator and condenser? Are they clean and free of debris?
There are a lot of other things that effect cooling performance that should be addressed before considering modifying a vehicle.
Some standard questions when it comes to cooling performance:
What is the condition of your fan shroud? Do you have a fan shroud?
Does the fan clutch work properly?
Does your A/C system need to be serviced anyways?
Are the fins straight on the radiator and condenser? Are they clean and free of debris?
There are a lot of other things that effect cooling performance that should be addressed before considering modifying a vehicle.
Thread Starter
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Tuned
Joined: Jun 2005
Posts: 421
Likes: 1
To be honest anything in front of the radiator is going to do more harm than good.
Some standard questions when it comes to cooling performance:
What is the condition of your fan shroud? Do you have a fan shroud?
Yes I have a Fan shroud it in great condition
Does the fan clutch work properly?
Yes the clutch fan works good.
Does your A/C system need to be serviced anyways?
The A/C is a R-12 system and it works and if could have it serviced I would the A/C out 1992 truck.
Are the fins straight on the radiator and condenser? Are they clean and free of debris?
The fins are mostly straight there some bent ones.
There are a lot of other things that effect cooling performance that should be addressed before considering modifying a vehicle.
Like I said the A/C works great as long there air blowing through it.
Some standard questions when it comes to cooling performance:
What is the condition of your fan shroud? Do you have a fan shroud?
Yes I have a Fan shroud it in great condition
Does the fan clutch work properly?
Yes the clutch fan works good.
Does your A/C system need to be serviced anyways?
The A/C is a R-12 system and it works and if could have it serviced I would the A/C out 1992 truck.
Are the fins straight on the radiator and condenser? Are they clean and free of debris?
The fins are mostly straight there some bent ones.
There are a lot of other things that effect cooling performance that should be addressed before considering modifying a vehicle.
Like I said the A/C works great as long there air blowing through it.
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Tuned
Joined: Jun 2005
Posts: 421
Likes: 1
Did some asking around and digging there is places that still have R-12 but it expensive.
And they also make a new type of R-12a that will mix with the old R-12.
And they also claim the R-12a will mix with R134 and make the system run cooler also.
Duracool® Technical Information - FAQ'S
And they also make a new type of R-12a that will mix with the old R-12.
And they also claim the R-12a will mix with R134 and make the system run cooler also.
Duracool® Technical Information - FAQ'S
Fleet Owner
Joined: Oct 2005
Posts: 20,785
Likes: 1,751
From: Kentucky
I buy 12 ounce cans of new R12 on E-Bay. If I can avoid it I do not like using R12 variants. I've done it, it worked but not my favorite way to go.
Once the initial doom and gloom of R12 production ceasing the prices have come back down to earth that make sourcing small quantities online cost effective IMHO.
Once the initial doom and gloom of R12 production ceasing the prices have come back down to earth that make sourcing small quantities online cost effective IMHO.
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Mazda_man
1983 - 2012 Ranger & B-Series
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Nov 8, 2004 10:27 PM