Alternator Recommendation
Thread Starter
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
Alternator Recommendation
So I'm in the middle of getting the engine bay put back together and I'm thinking the original alternator that my dad ran won't work with the new setup. The one I pulled was a Delco Remy 1100543 42amp. I'm guessing that won't be sufficient anymore.
I just got the engine back from the builder, here's a quick rundown.
427 block, bored .030 over
L88 aluminum heads
Lunati 20110550K roller cam
Rocker rollers
Comp Cams stud girdle
Rebuilt M22 rock crusher
And it will be cooled with a Dewitts radiator with dual electric fans which are causing the alternator concerns. So what amp would you guys recommend?
I just got the engine back from the builder, here's a quick rundown.
427 block, bored .030 over
L88 aluminum heads
Lunati 20110550K roller cam
Rocker rollers
Comp Cams stud girdle
Rebuilt M22 rock crusher
And it will be cooled with a Dewitts radiator with dual electric fans which are causing the alternator concerns. So what amp would you guys recommend?
Le Mans Master
Joined: Oct 2007
Posts: 7,453
Likes: 976
From: RI, Now Franklin/Nashville TN
I have been using a 140 amp CS-144 alternator from here:
http://www.nationsautoelectric.com/autoalt.html
for over 10 years. Puts out 90 amps at idle. Upgrade the stock wiring and you are good to go...........
http://www.nationsautoelectric.com/autoalt.html
for over 10 years. Puts out 90 amps at idle. Upgrade the stock wiring and you are good to go...........
Last edited by jb78L-82; May 1, 2018 at 06:35 AM.
Instructor
Joined: Jun 2016
Posts: 119
Likes: 5
From: Spain
I'm also thinking of getting a new alternator. Is the CS-144 a direct replacement? Besides upgrading the wire with beefier ones, anything else needed?
I'm looking for a replacement that doesn't need any additional changes.
I'm looking for a replacement that doesn't need any additional changes.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
The CS-144 is an excellent choice as it is capable of delivering more power at lower RPM than most. A lot of the mega-amp alts available only deliver at a higher RPM and usually you need the power at idle or low cruise when the fans are on rather than the highway when you're getting airflow.
The cs-144 is a larger size than the 10/12 si but can be made to work
https://www.corvetteforum.com/forums...des-72-bb.html
I've since moved mine to the passenger side for various reasons but extending the bracket was straight forward.
M
The cs-144 is a larger size than the 10/12 si but can be made to work
https://www.corvetteforum.com/forums...des-72-bb.html
I've since moved mine to the passenger side for various reasons but extending the bracket was straight forward.
M
Thread Starter
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
The CS-144 is an excellent choice as it is capable of delivering more power at lower RPM than most. A lot of the mega-amp alts available only deliver at a higher RPM and usually you need the power at idle or low cruise when the fans are on rather than the highway when you're getting airflow.
The cs-144 is a larger size than the 10/12 si but can be made to work
https://www.corvetteforum.com/forums...des-72-bb.html
I've since moved mine to the passenger side for various reasons but extending the bracket was straight forward.
M
The cs-144 is a larger size than the 10/12 si but can be made to work
https://www.corvetteforum.com/forums...des-72-bb.html
I've since moved mine to the passenger side for various reasons but extending the bracket was straight forward.
M
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
I used a Powermaster CS130D, part # 8207. Same dimensions as a stock SI. All you need is an adapter harness, and upgrade the output wire.
Switch pulleys with your old one, and it bolts right up.
95 amperes at idle.
Switch pulleys with your old one, and it bolts right up.
95 amperes at idle.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
The earlier CS130 seemed to be hit/miss on reliability especially when pushed to higher outputs
I haven't tried the CS130D but would expect they've got it worked out by now
M
Thread Starter
Drifting
Joined: Mar 2013
Posts: 1,926
Likes: 304
From: Lansing MI
I was looking at that setup as well. I wasn't sure if the 115 amp would be sufficient or not with my setup...
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Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
A 17SI has a output of 108 amps, and rund dual spals on my vette with no problem, even with a/c on high speed in FLORIDA.....been on there for some 20 years with one exchange not related to anything rong with the unit, inherently .....
I put a CS144 on a old Chevy motor home/van project, fit right in place, using the stock 350 engine drives....up top on pass side....
I put a CS144 on a old Chevy motor home/van project, fit right in place, using the stock 350 engine drives....up top on pass side....
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
just got one from these guys. Very impressed. They have the Cs144
https://alternatorparts.com/10si-12s...ternators.html
https://alternatorparts.com/10si-12s...ternators.html
Last edited by Surfer69; May 1, 2018 at 04:11 PM.