89 corvette alternator upgrade
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
89 corvette alternator upgrade
Ok trying to get a cs144 alternator for a 89 corvette. I ordered a ac delco 19135994 for a 96 corvette and the mount holes are to far apart. I found more info should be a 19135993 from a 97 pontiac firebird . There is a half inch difference in mount holes. Can anyone confirm this.
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
A '97 Trans Am alternator will fit if you don't mind modding a few things. I have a smog pump delete so it practically drops in. The rear support bracket won't line up. Don't leave it off, make a new one. I had to do that anyway when the headers went on. It is a worthwhile upgrade. Consider upgrading the cable from the alternator to the battery/fuselink junction, whichever you have. It changed the belt length a little but so did the smog pump delete so it wasn't a big deal for me.
Melting Slicks
Joined: Jan 2014
Posts: 2,187
Likes: 381
From: Lunenburg MA
My '90 with everything on draws just over 100 amps according to my clamp meter. The CS130 handles it at idle staying right around 12.7V, up to 13.5V at 2000 RPM. I was expecting it to fall off, but it didn't. It did get pretty hot though.
Safety Car
Joined: Aug 2009
Posts: 3,751
Likes: 276
From: Melbourne, Victoria, Australia
Ok trying to get a cs144 alternator for a 89 corvette. I ordered a ac delco 19135994 for a 96 corvette and the mount holes are to far apart. I found more info should be a 19135993 from a 97 pontiac firebird . There is a half inch difference in mount holes. Can anyone confirm this.
Look around Google it and you will find high output alternators (same size as the 86-91 alternators.
I have one of the 200amp alternators on my c4, yes high electrical load stop start traffic and long periods of the car not being used. All need a good alternator to keep the battery charged.
See below links to some..
https://www.ebay.com.au/i/2833748390...SABEgKRWPD_BwE
https://www.dbelectrical.com/product...-89-90-91.html
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
Just got off phone with alternatorparts.com. Cs 144 alternators have 7.2 inches between mount points and my 89 vette has 6.60 inches between mount points. So according to him there is no cs144 that will fit. But I find online that a 97 pontiac firebird alternator will fit with minor modification.
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
Just got off phone with alternatorparts.com. Cs 144 alternators have 7.2 inches between mount points and my 89 vette has 6.60 inches between mount points. So according to him there is no cs144 that will fit. But I find online that a 97 pontiac firebird alternator will fit with minor modification.
This could 'maybe' be a more interesting place to start your research as to what's considered 'bolt in/drop in' under normal circumstances.
https://www.qualitypowerauto.com/pag...lternators.php
Last edited by WVZR-1; Nov 30, 2020 at 10:34 AM.
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
alternator over heated melting voltage regulator and bearing. Installed a used alternator temperately and it is running at 260 degrees voltage output normal with 70 amp load. A/C not on... From what i read 302 degrees max temp for alternator. I had planned on upgrade to the finned rear housing offered by alternatorparts.com but he has none in stock till maybe February 2021. So this is why i started looking into cs144 upgrade.
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
alternator over heated melting voltage regulator and bearing. Installed a used alternator temperately and it is running at 260 degrees voltage output normal with 70 amp load. A/C not on... From what i read 302 degrees max temp for alternator. I had planned on upgrade to the finned rear housing offered by alternatorparts.com but he has none in stock till maybe February 2021. So this is why i started looking into cs144 upgrade.
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Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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Mine was a direct drop in for my 86 and the 88, I have the AIR pump eliminator bracket. Rear support brace did not go back in.
Instructor
Joined: Mar 2007
Posts: 173
Likes: 18
From: Edinburgh Midlothian
Here is the details of the Alternator I purchased from Rockauto
ACDELCO 3351050
Amperage Rating 140
External Fan Included Yes
Family Delco CS144
Fan Type External
Finish Same as OE
Ground Type Negative
Mounting Type 1 Pivot Foot
One Wire Capable No
Plug Clock Rear View Main Mounting Ear at 6 O Clock 7
Pulley Belt Type Serpentine
Pulley Groove Quantity 6
Pulley Included Yes
Pulley Outside Diameter (In) 2.4
Regulator Type Internal
Rotation Direction Clockwise
Voltage 12
Alternate/OEM Part Number(s): 88877260
The distance between the pivot and the mounting lug is greater on the CS144 than the CS130 as it is physically a larger alternator, however I can confirm it is a direct fit.
ACDELCO 3351050
Amperage Rating 140
External Fan Included Yes
Family Delco CS144
Fan Type External
Finish Same as OE
Ground Type Negative
Mounting Type 1 Pivot Foot
One Wire Capable No
Plug Clock Rear View Main Mounting Ear at 6 O Clock 7
Pulley Belt Type Serpentine
Pulley Groove Quantity 6
Pulley Included Yes
Pulley Outside Diameter (In) 2.4
Regulator Type Internal
Rotation Direction Clockwise
Voltage 12
Alternate/OEM Part Number(s): 88877260
The distance between the pivot and the mounting lug is greater on the CS144 than the CS130 as it is physically a larger alternator, however I can confirm it is a direct fit.
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
If it was a RA order I'd say 'CANCEL' ...............
Rethink this and if you want an actual performance package discuss it with someone!!! There are various 'case clockings' available and NO ONE that's responded to you has mentioned how they did a rear brace!!! NO ONE ...... It's been mentioned by one that it was 'not used'!!!
There are I believe 5 'rear housing' variations.....
Last edited by WVZR-1; Dec 2, 2020 at 10:24 AM.
Team Owner
Joined: Sep 2001
Posts: 62,146
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
No the rear brace support pretty much needs to be made custom, lengthened in my case, on both the 86 and 88.
However its not really needed. The AIR support above, whether you use the actual AIR pump or eliminator brace instead, is enough to keep things from problems. Even my torque monster hasn't cracked anything.
Its the rear AC support bracket that MUST be retained (e.g., if you add headers, it won't fit most of us) or that will break the cheap pot metal AC bracket that holds the tensioner and AC together.
However its not really needed. The AIR support above, whether you use the actual AIR pump or eliminator brace instead, is enough to keep things from problems. Even my torque monster hasn't cracked anything.
Its the rear AC support bracket that MUST be retained (e.g., if you add headers, it won't fit most of us) or that will break the cheap pot metal AC bracket that holds the tensioner and AC together.
Drifting
Joined: Feb 2006
Posts: 1,423
Likes: 96
From: Magnolia Tx
If it was a RA order I'd say 'CANCEL' ...............
Rethink this and if you want an actual performance package discuss it with someone!!! There are various 'case clockings' available and NO ONE that's responded to you has mentioned how they did a rear brace!!! NO ONE ...... It's been mentioned by one that it was 'not used'!!!
There are I believe 5 'rear housing' variations.....
Rethink this and if you want an actual performance package discuss it with someone!!! There are various 'case clockings' available and NO ONE that's responded to you has mentioned how they did a rear brace!!! NO ONE ...... It's been mentioned by one that it was 'not used'!!!
There are I believe 5 'rear housing' variations.....
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
OP looked to be searching a performance build. Is the ACD considered a performance build? Not by many!
Last edited by WVZR-1; Dec 3, 2020 at 07:46 AM.
Team Owner
Joined: Sep 2003
Posts: 25,389
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