Sharing my painful to pocket book story - Third Generation F-Body Message Boards

Go Back  Third Generation F-Body Message Boards > Tech Boards > Aftermarket Product Review
Reload this Page >

Sharing my painful to pocket book story

Aftermarket Product Review Provide questions and answers about aftermarket parts for the Third Generation F-Body.

Sharing my painful to pocket book story

Reply

Old 04-12-2018, 01:28 AM
  #1  
Member
Thread Starter
 
383RAT's Avatar
 
Join Date: Mar 2009
Location: Saint Louis, MO
Posts: 159
Sharing my painful to pocket book story

There doesn't seem to be a good category for this one but I'll put it here.


I discovered the hard way the alternator doesn't like the higher RPMs so much. I do not have oversized or undersized drive pulley, alternator pulley is stock size so lets clear that up now. After full time automotive mechanic friend did a little searching around it seems the max recommended RPM for a stock alternator is 5600 RPM. Well I've been routinely taking my car to 6300RPM. Doesn't seem like much more does it. Well the laws that govern centrifugal force seem to disagree. My alternator fan quite literally tore apart and exploded. I can see the metal tear from the attachment point on out. If I knew how to load pictures on this forum I would.

I was impressed by the amount of damage a small metal fan blade can do. Went right through the hood liner, bent the hood out ward with enough force some paint popped off, it came back down sliced right through a custom made fuse box, and then struck the high pressure steering hose cutting it.


Fixing and repainting the hood ouch just ouch for the quotes I got.


So anyone running high RPM's I strongly suggest measuring your pulleys and doing the math. Exploding alternator fans are not cool.
383RAT is offline  
Reply With Quote
Old 04-12-2018, 12:55 PM
  #2  
Supreme Member
 
Join Date: Oct 2004
Location: Henrietta NY
Posts: 3,778
Re: Sharing my painful to pocket book story

Post some pictures or put a video on youtube
midias is offline  
Reply With Quote
Old 04-12-2018, 07:20 PM
  #3  
Supreme Member
 
Join Date: Jan 2009
Location: belle fourche,s.d.
Posts: 1,730
Re: Sharing my painful to pocket book story

cs130 alternator fans are prone to developing fatigue cracks because of the design of the fan and flying apart.Earlier models of Delco alternator do not have this problem.
8t2 z-chev is offline  
Reply With Quote
Old 04-12-2018, 09:25 PM
  #4  
Junior Member
 
Toxicant's Avatar
 
Join Date: Feb 2012
Location: St Marys,GA
Posts: 39
Re: Sharing my painful to pocket book story

Originally Posted by 383RAT View Post
it seems the max recommended RPM for a stock alternator is 5600 RPM.
well im going to go ahead and program my FiTechs rpm cut off now.
Toxicant is offline  
Reply With Quote
Old 04-12-2018, 10:50 PM
  #5  
Member
Thread Starter
 
383RAT's Avatar
 
Join Date: Mar 2009
Location: Saint Louis, MO
Posts: 159
Re: Sharing my painful to pocket book story

Originally Posted by midias View Post
Post some pictures or put a video on youtube
I don't really do youtube videos anymore. Time consuming to do and I don't really enjoy making them. I don't have much spare time.

How do you post pictures to this forum? I can't figure it out. I think it might be my browser??? I don't know but I see nothing to attach pictures. I'll post pictures if someone would tell me how. I think I still have the pictures or the fan bits.

Last edited by 383RAT; 04-12-2018 at 10:53 PM.
383RAT is offline  
Reply With Quote
Old 04-13-2018, 12:37 AM
  #6  
Supreme Member
iTrader: (28)
 
Drew's Avatar
 
Join Date: Jul 1999
Location: Salina, KS
Posts: 16,632
Re: Sharing my painful to pocket book story

Click the little yellow box with the gray mountains and the sun.


Drew is offline  
Reply With Quote
Old 04-13-2018, 08:01 AM
  #7  
Supreme Member
iTrader: (6)
 
TTOP350's Avatar
 
Join Date: Oct 2001
Location: central Il USA
Posts: 9,778
Re: Sharing my painful to pocket book story

Guess I should stop spinning my engine to 8k then...... naaah
TTOP350 is offline  
Reply With Quote
Old 04-14-2018, 08:36 AM
  #8  
Member
Thread Starter
 
383RAT's Avatar
 
Join Date: Mar 2009
Location: Saint Louis, MO
Posts: 159
Re: Sharing my painful to pocket book story

Had to fiddle with browser add ons. Now it works



Alt fan whats left of it.



Custom fuse box destroyed



Hood damage
383RAT is offline  
Reply With Quote
Old 04-17-2018, 04:19 PM
  #9  
Supreme Member
iTrader: (8)
 
DynoDave43's Avatar
 
Join Date: Aug 2013
Location: MICHIGAN
Posts: 2,868
Re: Sharing my painful to pocket book story

Yikes.
DynoDave43 is offline  
Reply With Quote
Old 04-17-2018, 06:24 PM
  #10  
Supreme Member
iTrader: (3)
 
PurelyPMD's Avatar
 
Join Date: Jan 2013
Location: Newtown, CT
Posts: 2,968
Re: Sharing my painful to pocket book story

Ok, so that's bad. I was a little fuzzy on the whole good/bad thing. (Ghostbusters)
PurelyPMD is offline  
Reply With Quote
Old 07-16-2018, 12:34 PM
  #11  
Junior Member
 
legend71's Avatar
 
Join Date: Oct 2011
Location: Washington
Posts: 83
Re: Sharing my painful to pocket book story

When I was in college I had a nice 93 Z71 with a brand new motor. On the drive back from summer break my alternator threw a blade through the cowl hood...


I feel your pain.
legend71 is offline  
Reply With Quote
Old 07-16-2018, 03:54 PM
  #12  
Supreme Member
 
W.E.G.'s Avatar
 
Join Date: Dec 2012
Location: northern VA
Posts: 1,316
Re: Sharing my painful to pocket book story

I think you should JB weld the fan-blades so they are sticking out of the holes in the hood.

Zip-tie a twisted piston rod so it shows below your K-member while you're at it.

Make the most of it!
W.E.G. is offline  
Reply With Quote
Old 07-16-2018, 10:47 PM
  #13  
Member
iTrader: (3)
 
SirReveller's Avatar
 
Join Date: Aug 2017
Location: Toronto, ON
Posts: 275
Re: Sharing my painful to pocket book story

So GM stuck on an alternator that may (probability to be determined) grenade if you routinely blast past 5600rpm? Damn. I’m flashing past 6 every second day. And I thought generally if and when these puppies went they just failed in your driveway...
SirReveller is offline  
Reply With Quote
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
edpontiac91
Miscellaneous Third Gen Items!
1
10-31-2016 08:18 PM
kentuckyKITT
Interior Parts Wanted
8
04-21-2013 01:01 PM
firebirdta84
History / Originality
2
06-08-2006 04:25 PM
TpiTony
Mid-West Region
9
09-21-2004 03:48 AM
pontiacpete
TPI
5
09-29-2002 10:33 PM


Thread Tools
Search this Thread
Quick Reply: Sharing my painful to pocket book story


Advertising
Featured Sponsors
Vendor Directory

Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: