Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> HELP!, /6 Alternator gurus needed.
Series9
post Apr 26 2006, 11:57 PM
Post #1


Lesbians taste like chicken.
*****

Group: Members
Posts: 5,444
Joined: 22-August 04
From: DeLand, FL
Member No.: 2,602
Region Association: South East States
The late alternator I got for Liz doesn't fit. It's about .5" too thick.

I'm trying to install an internally regulated alternator in a '77 engine.

Anyone?

I'll be in SoCal the next two days and will bring the alternator with me. If anyone has a Carrera alternator I could see, I would be appreciative.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Britain Smith
post Apr 27 2006, 12:24 AM
Post #2


Nano Member
****

Group: Members
Posts: 2,354
Joined: 27-February 03
From: Hillsboro, OR
Member No.: 364
Yea, to install a late model Carrera internally regulated alternator in a early style fan housing you have to machine off about 3/4" if the internal step. You can kinda see it in this picture, it is the area that the powercoating has been shaved off.

-Britain

Before:
(IMG:http://www.britainsmith.com/Porsche/912Project/Powdercoating/images/169_0027_JPG.jpg)

After:
(IMG:http://www.britainsmith.com/Porsche/912Project/Powdercoating/images/170_0034_JPG.jpg)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Series9
post Apr 27 2006, 06:30 AM
Post #3


Lesbians taste like chicken.
*****

Group: Members
Posts: 5,444
Joined: 22-August 04
From: DeLand, FL
Member No.: 2,602
Region Association: South East States
Why is there no mention of that in this Porsche bulletin?



Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gary
post Apr 27 2006, 06:48 AM
Post #4


Senior Member
***

Group: Members
Posts: 746
Joined: 12-January 03
From: Mount Airy, MD
Member No.: 134
Region Association: MidAtlantic Region
That bulletin is for the -SC alternator. The later carrera alternator, also internally regulated is bigger. Carrera fan housings are rare as hen's teeth, partly due to their tendency to crack. I ended up buying a new one... If you end up going that route, there happens to be one on 'bay now that looks to be in good condition: 8060067042.

I'm happy with my set up - very clean. FWIW, a lot of the 911 guys recommend going back to the externally regulated setup due to premature failure of the internal regulator, felt to be due to heat from closer proximity to the motor.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gary
post Apr 27 2006, 06:50 AM
Post #5


Senior Member
***

Group: Members
Posts: 746
Joined: 12-January 03
From: Mount Airy, MD
Member No.: 134
Region Association: MidAtlantic Region
Oh, and you'll also need to notch the air deflector on the back of the alternator to clear the regulator. When you try to put the deflector on, the area needing the notch is obvious. A couple minutes with a dremel sanding drum fixes that.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gint
post Apr 27 2006, 05:34 PM
Post #6


Mike Ginter
***************

Group: Admin
Posts: 16,095
Joined: 26-December 02
From: Denver CO.
Member No.: 20
Region Association: Rocky Mountains
This is good stuff. Any more tips?

(IMG:style_emoticons/default/icon_bump.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post Apr 27 2006, 05:40 PM
Post #7


914 Historian
*****

Group: Benefactors
Posts: 5,225
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
I thought the alternator grounded through the fan housing. Such a fancy painted fan shroud might cause grounding problems would it not?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Apr 27 2006, 07:57 PM
Post #8


914 Wizard
**********

Group: Members
Posts: 10,695
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
3 diff. depths, early fan housings, all 3 same overall dimension outside. front to back.
There is 3 different thickness ,28mm/19mm/7mm,
this is measured with calipers from your shiny surface to to back side.
I have cut em deeper no problem, I used a cnc mill, and a lathe (scary).
oh ya grounded through harness and needs a ground wire from alt. to the engine
hope this helps
upper left housing is the deeep one


Attached image(s)
Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Series9
post Apr 27 2006, 10:28 PM
Post #9


Lesbians taste like chicken.
*****

Group: Members
Posts: 5,444
Joined: 22-August 04
From: DeLand, FL
Member No.: 2,602
Region Association: South East States
This has been very informative.

Thanks guys.

Anyone have the correct housing to sell me?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
davep
post Apr 28 2006, 08:58 AM
Post #10


914 Historian
*****

Group: Benefactors
Posts: 5,225
Joined: 13-October 03
From: Burford, ON, N0E 1A0
Member No.: 1,244
Region Association: Canada
Are there not different diameters as well? I know the racing engines used a small diameter fan, but were not regular production engines using them as well? Somehow I recall that the early 11 blade type were large diameter as was the 5 blade type that followed it. Then the new 11 blade type after that was a small diameter like the racing engines. Does that make sense? My book is out on loan, so I cannot look it up.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Britain Smith
post Apr 28 2006, 01:03 PM
Post #11


Nano Member
****

Group: Members
Posts: 2,354
Joined: 27-February 03
From: Hillsboro, OR
Member No.: 364
The fan blades are different diameters but the housing stayed the same.


Good call on the grounding, I will add a grounding wire.

-Britain
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Gint
post Apr 28 2006, 07:28 PM
Post #12


Mike Ginter
***************

Group: Admin
Posts: 16,095
Joined: 26-December 02
From: Denver CO.
Member No.: 20
Region Association: Rocky Mountains
This thread needs a... (IMG:style_emoticons/default/icon_bump.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Series9
post May 1 2006, 03:32 PM
Post #13


Lesbians taste like chicken.
*****

Group: Members
Posts: 5,444
Joined: 22-August 04
From: DeLand, FL
Member No.: 2,602
Region Association: South East States
The housing is at the machine shop to be 'corrected'.

Interestingly enough, I think the housing on Mike's 3.2 has the same part number as the one I'm modifying for Liz.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 2nd January 2025 - 06:02 PM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...