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alternator what amp?

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Old Feb 14, 2010 | 07:29 PM
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techno_1961's Avatar
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alternator what amp?

so theres a few different amp alternators out there i have a 86 iroc 305 tune port injection with a/c what amp alternator does my car call for?
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Old Feb 15, 2010 | 02:25 AM
  #2  
87IROC-DAN61's Avatar
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From: Chilliwack BC
Car: White 1987 IROC-Z
Engine: 305 TPI LB9, 215 HP
Transmission: Borg-Warner T5 NWC
Axle/Gears: Borg-Warner 7.75 with 3.27 ratio
Re: alternator what amp?

Originally Posted by techno_1961
so theres a few different amp alternators out there i have a 86 iroc 305 tune port injection with a/c what amp alternator does my car call for?
Hello techno_1961!!

My 1987 Iroc 305 TPI without A/C has the 105 amp alt, yours I believe is 78 amps. You can check that out by looking at the alt case, the info is stamped into it.


Last edited by 87IROC-DAN61; Feb 15, 2010 at 03:00 AM.
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Old Feb 15, 2010 | 12:43 PM
  #3  
weaz4200's Avatar
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From: near chicago illinois
Car: have a 92 camaro rs...in pieces
Engine: none now...probably 383 stroker
Transmission: none yet
Axle/Gears: none
Re: alternator what amp?

Could be any one of these....

42 Amp 1979865
78 Amp 10463058
94 Amp 10463397
100 Amp 10463014
105 Amp 10463104
108 Amp 10464391
120 Amp 10464392
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Old Feb 15, 2010 | 10:21 PM
  #4  
8t2 z-chev's Avatar
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: alternator what amp?

probably will be a 97 or 108 a 17si type,those were used
on '85 and'86 tpi models. Could also be 120a,depending
on options.Late production '86 could have cs144 type.
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Old Feb 17, 2010 | 11:23 PM
  #5  
87IROC-DAN61's Avatar
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Joined: Dec 2009
Posts: 850
Likes: 8
From: Chilliwack BC
Car: White 1987 IROC-Z
Engine: 305 TPI LB9, 215 HP
Transmission: Borg-Warner T5 NWC
Axle/Gears: Borg-Warner 7.75 with 3.27 ratio
Re: alternator what amp?

Originally Posted by techno_1961
so theres a few different amp alternators out there i have a 86 iroc 305 tune port injection with a/c what amp alternator does my car call for?
Hello again techno_1961!!

Check your RPO codes if you got them, a K68 will be for the 105 amp alt!!

If you have a different RPO than K68, run all your "K" series RPO's in the RPO decoder, you should be able to find it out from them!!

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