how to wire up a 1995 140Amp alternator on a 69 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69C-owner · 01-01-2012, 02:53 AM

I already have aninternally regulated alternator wired up and charging but the newer alternator is good and just laying in my "spare parts" pile so a swap would be cool if anyone can help, the alternator came off of a buick roadmaster, LT1 car
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**VetteVet** · 01-02-2012, 12:57 AM

Have a look here.
http://temp.corvetteforum.net/c3/zma...ternator01.htm

71meangreenc10 · 01-02-2012, 06:37 PM

Keep an eye on the wiring, the red wire that goes across to the battery, if you use the 140 amp make sure the wire doesnt get really hot.

Smitty

Street Smart · 01-03-2012, 10:40 PM

Quote:

Originally Posted by 71meangreenc10

Keep an eye on the wiring, the red wire that goes across to the battery, if you use the 140 amp make sure the wire doesnt get really hot.

Smitty

true, can`t hurt to run a heavier wire.

69C-owner · 03-02-2012, 12:33 AM

Ttt
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storm9c1 · 03-03-2012, 02:13 AM

What do you want to know that wasn't already in that article that VetteVet posted? There is tons of information here about swapping alternators if you poke around. The biggest issue is the regulator mod. The LT1 140A is a really good alt, but it will be configured for a serp and you need a V-belt pulley for your '69. I'd be curious too if there is an easy way to do that.............

69C-owner · 03-06-2012, 11:58 PM

im sure I can swap the pulleys and I already have an internally regulated alternator wired up and charging, I need to reread thru that article on an off day when my mind isnt fried lol

dwcsr · 03-07-2012, 12:45 AM

A single V belt may not be enough to drive a 140 amp alt. You may need to convert to a dual V belt or Serp setup

MalibuSSwagon · 03-07-2012, 02:13 AM

I have the SI series on my 86, running a ribbed pulley. Now should I swap over the pulley and fan or just the pulley? My alternator mounts on the right (passenger) side of the engine.

This thread made me do a little research and I realized that the stock 42 amp alternator will not be enough with the TPI conversion, it was barely enough before!

jhngardner367 · 03-09-2012, 07:18 PM

Changing the pulleys is easy.Just make sure you use the spacer that was with the original pulley.
Also,I just put a 105amp alt on my '85,and still used the v-pulley,with no problems.I used the alt from a '94 Grand Am. I did have to make a top mount/adjuster,but it works.

01-01-2012, 02:53 AM	#1
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	how to wire up a 1995 140Amp alternator on a 69 I already have aninternally regulated alternator wired up and charging but the newer alternator is good and just laying in my "spare parts" pile so a swap would be cool if anyone can help, the alternator came off of a buick roadmaster, LT1 car Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma

01-02-2012, 12:57 AM	#2
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,723	Re: how to wire up a 1995 140Amp alternator on a 69 Have a look here. http://temp.corvetteforum.net/c3/zma...ternator01.htm __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

01-02-2012, 06:37 PM	#3
71meangreenc10 Its a Truck Thing...... Join Date: Dec 2004 Location: Sierra Vista, Arizona Posts: 3,179	Re: how to wire up a 1995 140Amp alternator on a 69 Keep an eye on the wiring, the red wire that goes across to the battery, if you use the 140 amp make sure the wire doesnt get really hot. Smitty __________________ 71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van"

03-02-2012, 12:33 AM	#5
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	Re: how to wire up a 1995 140Amp alternator on a 69 Ttt Posted via Mobile Device __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma

03-03-2012, 02:13 AM	#6
storm9c1 * That's interesting * Join Date: Oct 2008 Location: Pittsburgh, PA Posts: 2,772	Re: how to wire up a 1995 140Amp alternator on a 69 What do you want to know that wasn't already in that article that VetteVet posted? There is tons of information here about swapping alternators if you poke around. The biggest issue is the regulator mod. The LT1 140A is a really good alt, but it will be configured for a serp and you need a V-belt pulley for your '69. I'd be curious too if there is an easy way to do that............. __________________ Tom Chevy by day... 1969 Chevy C30 Rollback Tow Truck -- 383 stroker, 4L80E 2011 Chevy Caprice PPV 9C3 6.0L 1995 Chevy Caprice 9C1 1994 Chevy Caprice 9C1 #3 1995 Chevy Caprice Wagon #2 1995 Chevy Impala SS Mopar by night... 1969 Dodge Charger 1972 Chrysler Newport 2dr Hardtop (27K miles) Plus others...

03-06-2012, 11:58 PM	#7
69C-owner Registered User Join Date: Dec 2010 Location: Apison Tn Posts: 490	Re: how to wire up a 1995 140Amp alternator on a 69 im sure I can swap the pulleys and I already have an internally regulated alternator wired up and charging, I need to reread thru that article on an off day when my mind isnt fried lol __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=43855069 LWB Fleet 1994 Buick Roadmaster 1994 GMC Sonoma

03-07-2012, 12:45 AM	#8
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,131	Re: how to wire up a 1995 140Amp alternator on a 69 A single V belt may not be enough to drive a 140 amp alt. You may need to convert to a dual V belt or Serp setup

03-07-2012, 02:13 AM	#9
MalibuSSwagon Registered User Join Date: Sep 2009 Location: Weare,NH Posts: 1,592	Re: how to wire up a 1995 140Amp alternator on a 69 I have the SI series on my 86, running a ribbed pulley. Now should I swap over the pulley and fan or just the pulley? My alternator mounts on the right (passenger) side of the engine. This thread made me do a little research and I realized that the stock 42 amp alternator will not be enough with the TPI conversion, it was barely enough before! __________________ Eric 1992 Oldsmobile Custom Cruiser 1986 Chevrolet C10\|5.3L\|TKO600\|Shortbed\|Custom Deluxe 1983 Malibu Wagon\|TPI 305\|T5 5 speed\|3.73 non-posi

03-09-2012, 07:18 PM	#10
jhngardner367 Registered User Join Date: Feb 2012 Location: Austin, Arkansas Posts: 249	Re: how to wire up a 1995 140Amp alternator on a 69 Changing the pulleys is easy.Just make sure you use the spacer that was with the original pulley. Also,I just put a 105amp alt on my '85,and still used the v-pulley,with no problems.I used the alt from a '94 Grand Am. I did have to make a top mount/adjuster,but it works. __________________ Always expect the unexpected,....but don't expect the unexpected to be the unexpected you expect ! I'm busier than a one-legged cat,in a sandbox! Veteran..and proud ! I can't fix what ain't broke....you want I should break it?



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