[RANT] SBC Alternator brackets...
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
[RANT] SBC Alternator brackets...
I don't know anybody that sells high quality alternator brackets that work with headers. I use the 2 piece setup. One piece mounts on top of the cyl #1 pipe and a L-shaped bracket that mounts on top of that bracket and holds the alternator.. I'm breaking at least one of those brackets every 5000 miles... The same thing happened on my previous C3's... This morning - I drove 240 miles from Ft. Lauderdale to Orlando and I broke another one.. I noticed it when I stopped for breakfast.. Luckily - I always carry spare alternator brackets with me and I fixed it.. The quality of those brackets is horrible.. I tried many brackets from different brands etc.. and all of them break.. I'm not able to find those brackets in forged steel so that they'll last.. Does anybody know a place that sells those brackets in higher quality??
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: [RANT] SBC Alternator brackets... (turtlevette)
do you have acessory holes in your heads?
BTW - here's the bracket that usually breaks:
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
i ran those brackets for a while when i had an engine with the old double hump heads without acessory holes. They are flimsey and a pain to put on. Why dont you just use the newer iron or aluminum bracket that bolts to the front of the head? I gurantee you won't break that one. Check out the alt bracket for a 75 vette.
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: [RANT] SBC Alternator brackets... (turtlevette)
i ran those brackets for a while when i had an engine with the old double hump heads without acessory holes. They are flimsey and a pain to put on. Why dont you just use the newer iron or aluminum bracket that bolts to the front of the head? I gurantee you won't break that one. Check out the alt bracket for a 75 vette.
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
iThose modern brackets are way too expensive.. I'm willing to spend up to $100 for something that lasts..
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
do you have acessory holes in your heads?
yes - I do!!
BTW - here's the bracket that usually breaks:
yes - I do!!
BTW - here's the bracket that usually breaks:
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Pro
Joined: Nov 2000
Posts: 594
Likes: 0
From: Tucson AZ
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
Please excuse the quality of the pictures but this is the alternator bracket that I am using. The number on the casting is 3951337. I believe that it is a GM part so you should be able to locate one.
Craig
Craig
Burning Brakes
Joined: Jun 2000
Posts: 1,207
Likes: 1
From: Atascadero CA
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
I've had the same problems!! :mad Plus, the header bolts are always working loose where the bracket mounts, which gets old really fast. I ended up buying a March billet bracket for more money than I wanted to spend, but it's a REALLY nice, solid mount.
As an option, Summit Racing sells billet aluminum brackets for short and long water pumps for $60 - $70:
SME-2000 Chevrolet: 262-400, long water pump, billet alluminum, alternator bracket $59.95
SME-2001 Alternator Bracket, SBC Short-WP, Driver Side-Cylinder Head Mnt., Satin $69.95
As an option, Summit Racing sells billet aluminum brackets for short and long water pumps for $60 - $70:
SME-2000 Chevrolet: 262-400, long water pump, billet alluminum, alternator bracket $59.95
SME-2001 Alternator Bracket, SBC Short-WP, Driver Side-Cylinder Head Mnt., Satin $69.95
C6 the C5 of tomorrow
Joined: Nov 2000
Posts: 6,665
Likes: 2
From: Twin Cities Minnesota
Re: [RANT] SBC Alternator brackets... (VetteNut72)
I run this as well. It won't be breaking...
Please excuse the quality of the pictures but this is the alternator bracket that I am using. The number on the casting is 3951337. I believe that it is a GM part so you should be able to locate one.
Craig
Craig
Le Mans Master
Joined: Jan 2001
Posts: 6,938
Likes: 1
From: San Diego CA
Re: [RANT] SBC Alternator brackets... (427V8)
Okay try taking the busted one to a machinery repairman and lay a thick bead on the break point (assuming they all break on the same spot).
PROBLEM SOLVED!
PROBLEM SOLVED!
Thread Starter
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: [RANT] SBC Alternator brackets... (turtlevette)
iThose modern brackets are way too expensive.. I'm willing to spend up to $100 for something that lasts..
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2455624800
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2455624800
Team Owner
Joined: Sep 2001
Posts: 30,958
Likes: 0
From: Middletown Connecticut
Cruise-In IV Veteran
Re: [RANT] SBC Alternator brackets... (Cali,68,L-79)
Okay try taking the busted one to a machinery repairman and lay a thick bead on the break point (assuming they all break on the same spot).
PROBLEM SOLVED!
PROBLEM SOLVED!
Burning Brakes
Joined: Jul 2003
Posts: 888
Likes: 0
From: Angola IN
CI 5-6-7-8-9 Veteran
Cruise-In 7 Car Show Winner
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
I bought both a steel, and a alum. type later vette bracket on ebay for less than 30.00 each.
I put the alum on mine after polishing it, but the steel would be better for your application. Top adjuster bracket is a Mr. Gasket chrome for 10.00. Fits perfectly!! Total bill: less than 60.00 and far better than the POS replacements they offer us with older C3s
Frank
I put the alum on mine after polishing it, but the steel would be better for your application. Top adjuster bracket is a Mr. Gasket chrome for 10.00. Fits perfectly!! Total bill: less than 60.00 and far better than the POS replacements they offer us with older C3s
Frank
Drifting
Joined: Mar 2001
Posts: 1,396
Likes: 6
From: Indiana
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
I ran the hooker brackets for years with my original alternator and had no problems. After installing my Powermaster alternator, I began breaking the mounting bolts frequently and eventually the brackets broke too. The cause was a severe vibration i tracked down the chrome alternator fan. The hole in the center was offset far enough to cause this vibration. I should also note that the vibration only occured at a specific RPM (1800-2000). I replaced the chrome fan and now all is well. Even if you decide to go with the brackets mentioned by others, I would still check your alternator for this vibration.
Safety Car
Joined: Sep 2000
Posts: 4,679
Likes: 6
From: Charles Town WV
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
IMO this is the only way to go:
It's a March billet aluminum alternator bracket. It uses a tie rod with two heim joints to adjust the tension. No more prying, just turn the wrench and then tighten the jamb nuts.
It's $165 at Jegs, but honesty, it's worth it. That's not much more than you were willing to spend.
http://www.jegs.com/cgi-bin/ncommerc...11&prmenbr=361
Part Number 655-20130
[Modified by Steve Straus, 10:20 AM 1/24/2004]
It's a March billet aluminum alternator bracket. It uses a tie rod with two heim joints to adjust the tension. No more prying, just turn the wrench and then tighten the jamb nuts.
It's $165 at Jegs, but honesty, it's worth it. That's not much more than you were willing to spend.
http://www.jegs.com/cgi-bin/ncommerc...11&prmenbr=361
Part Number 655-20130
[Modified by Steve Straus, 10:20 AM 1/24/2004]
Melting Slicks
Joined: Feb 2003
Posts: 3,053
Likes: 4
St. Jude Donor '03,'11
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
Thanks! That looks exactly like what I need.. I just don't know if my accessory holes on my heads are the same as on the GM heads that that those brackets were made for.. My heads are DART Iron Eagle heads..
Le Mans Master
Joined: Jan 2001
Posts: 6,740
Likes: 1,383
Re: [RANT] SBC Alternator brackets... (GrandSportC3)
I have a 68 with holes in the head and a short water pump. Assuming you have a short water pump; you can get the cast iron bracket previously mentioned for about 5 bucks at a boneyard. I used to break those same flimsy brackets you mention have; then a friend told me to find an early 70's gm pickup(because they came with short water pumps), and I haven't had a problem since. I did have to get a slightly shorter belt.
Melting Slicks
Joined: Oct 2001
Posts: 2,065
Likes: 1,395
From: Halifax, Nova Scotia, Canada
Re: [RANT] SBC Alternator brackets... (427V8)
I run this as well. It won't be breaking...
Please excuse the quality of the pictures but this is the alternator bracket that I am using. The number on the casting is 3951337. I believe that it is a GM part so you should be able to locate one.
Craig
Please excuse the quality of the pictures but this is the alternator bracket that I am using. The number on the casting is 3951337. I believe that it is a GM part so you should be able to locate one.
Craig
I installed headers in 1972 and that bracket was used orginally on Chevy trucks.
At the time it was only a few dollars.
Before buying at a Corvette speciality store, check GM, sometimes these things are very well priced.
Barry