Notices
928 Forum
Sponsored by:
Sponsored by: 928 Specialists

Ultimate High Output Bosch Alternator fits 1985-1995

 
Old 12-06-2016, 06:34 PM
  #31  
GregBBRD

Rennlist
Basic Site Sponsor

Thread Starter
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 9,543
Default

Originally Posted by Rob Edwards View Post
Bottom of post #1, $795 for the next month, $995 thereafter. I know enough about this project to know that between the parts cost, machine time, and the sweat equity, this is more or less a zero sum game for Greg and Hans.

I had the pleasure of testing one of these on my GTS. Here it is at warm idle, A/C on recirc, front fan on high, rear fan on three, highbeams and fogs on, Stereo on with the sharkwoofer thumping. 13.93V at the jump post:



Stock brackets, easy fitment. We had it installed in about 20 minutes.

I'm always talking about the futility of making things for the tiny 928 market (along with my wife.)

For you guys sitting in front of your computer, here's the reality of doing stuff, like this:

I had to have 40 pieces made, before the CNC guy figured he could make a profit, cutting them out. I agreed and he bought enough material to make 40 pieces. Two of those pieces were "ruined" in set-up....so I ended up with 38 front housings.

At $795, I have to sell 25 completed alternators to break even....not including ANY development costs, engineering costs, drawing costs, labor to take the alternators apart and make the required modifications.

25 completed units to cover my actual cash outlay to buy the parts to do this!

My wife thinks I'm absolutely crazy, doing things like this.

I can't figure out why.
__________________
greg brown




714 879 9072
[email protected]

There's always different ways to do a particular job.

The trick, in life, is to know which of those ways are stupid....
GregBBRD is offline  
Old 12-06-2016, 06:50 PM
  #32  
supercedar
Addict
Rennlist Member
 
supercedar's Avatar
 
Join Date: Jul 2010
Location: Mukilteo, Wa.
Posts: 939
Default

Done!
supercedar is offline  
Old 12-06-2016, 07:00 PM
  #33  
Rob Edwards
Archive Gatekeeper
Rennlist Member
 
Rob Edwards's Avatar
 
Join Date: Sep 2002
Location: Irvine, CA
Posts: 13,596
Default

You know you're deep in the weeds of a project when you have to hike over to the machinist's shop to help him lift a freaking 6 foot long, 4x8 beam of aluminum onto the loading table for the CNC. Greg, what did that piece weigh? 300 pounds?
Rob Edwards is offline  
Old 12-06-2016, 07:07 PM
  #34  
James Bailey
Addict
Lifetime Rennlist
Member
 
James Bailey's Avatar
 
Join Date: Feb 2009
Posts: 18,054
Default

and 250 plus lbs of that turned into swarf ...
James Bailey is offline  
Old 12-06-2016, 07:30 PM
  #35  
MainePorsche
Addict
Rennlist Member
 
MainePorsche's Avatar
 
Join Date: Jul 2011
Location: North Country
Posts: 5,654
Default

Well mine is lined up.
Greg is even conscientious enough to get on phone to ask about status of power wire wires/harnesses.
In my case I had removed the little original power lines along with the wire looms for the 14 pin. Replaced any bad wire and fabricated new power lines using 1/0 quality copper cable. All were thermally and environmentally protected with materials purchased from aviation supplier. Had to do surgery at the starter attachment for the cables terminal connectors were so large.
I never lost function or had issue with everything ON, but I was never comfortable with the drop off on the voltmeter. Always knew the battery was paying for it.
I am very curious to see the new alternator.
Thanks Greg for providing such a remedy.
MainePorsche is offline  
Old 12-06-2016, 07:50 PM
  #36  
GregBBRD

Rennlist
Basic Site Sponsor

Thread Starter
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 9,543
Default

Originally Posted by Rob Edwards View Post
You know you're deep in the weeds of a project when you have to hike over to the machinist's shop to help him lift a freaking 6 foot long, 4x8 beam of aluminum onto the loading table for the CNC. Greg, what did that piece weigh? 300 pounds?
12' long.....enough material to make 20 pieces from each bar. Each "chunk" was 7" x 7" x 4".

They said the chunks of aluminum were 400 lbs each.

The end product was 2 lbs.

That means they removed 18 pounds of material from each block......720 pounds of scrap. Very efficient....

In the end, he told me that the "next" batch would cost more....that he underbid the job.

Great news....
__________________
greg brown




714 879 9072
[email protected]

There's always different ways to do a particular job.

The trick, in life, is to know which of those ways are stupid....
GregBBRD is offline  
Old 12-06-2016, 07:58 PM
  #37  
MainePorsche
Addict
Rennlist Member
 
MainePorsche's Avatar
 
Join Date: Jul 2011
Location: North Country
Posts: 5,654
Default

Greg, do you have any pics of the back of the unit ?
MainePorsche is offline  
Old 12-06-2016, 09:22 PM
  #38  
Rob Edwards
Archive Gatekeeper
Rennlist Member
 
Rob Edwards's Avatar
 
Join Date: Sep 2002
Location: Irvine, CA
Posts: 13,596
Default

Here's a rear 3/4 view- the alternator has a molded backplate with two grooves to locate the business end of the FOE harness to the B+ post.

Rob Edwards is offline  
Old 12-06-2016, 09:27 PM
  #39  
MainePorsche
Addict
Rennlist Member
 
MainePorsche's Avatar
 
Join Date: Jul 2011
Location: North Country
Posts: 5,654
Default

Thanks Doc.
MainePorsche is offline  
Old 12-06-2016, 09:45 PM
  #40  
Ducman82
 
Ducman82's Avatar
 
Join Date: Nov 2009
Location: Everett, WA
Posts: 6,948
Default

Originally Posted by Rob Edwards View Post
Yes, new crank pulley. Though I think Jake Myers has retrofitted his '81 with the whole alternator/PS pump cassette from the S3+ cars, to run a polyrib- belt alternator. Perhaps he can chime in.
I sure did. and i will be bolting one on tomorrow at the shop. ill take some pictures for us early folks.
Ducman82 is offline  
Old 12-07-2016, 11:11 PM
  #41  
ramcram
Addict
Rennlist Member
 
ramcram's Avatar
 
Join Date: Nov 2011
Location: Adelaide, South Australia
Posts: 449
Default

Originally Posted by Rob Edwards View Post
Yes, new crank pulley. Though I think Jake Myers has retrofitted his '81 with the whole alternator/PS pump cassette from the S3+ cars, to run a polyrib- belt alternator. Perhaps he can chime in.
I did this upgrade on my '81S and you are correct in that the power steering pump & bracket must also be changed with the front pulley.
The main reason being, the order of the belts, from the balencer out changed when Porsch went polyrib.
Also, one extra mounting hole on the front of the block had to be drilled and tapped. This was achieved with a right angle drill head.
ramcram is offline  
Old 12-08-2016, 01:00 AM
  #42  
GregBBRD

Rennlist
Basic Site Sponsor

Thread Starter
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 9,543
Default

Originally Posted by ramcram View Post
I did this upgrade on my '81S and you are correct in that the power steering pump & bracket must also be changed with the front pulley.
The main reason being, the order of the belts, from the balencer out changed when Porsch went polyrib.
Also, one extra mounting hole on the front of the block had to be drilled and tapped. This was achieved with a right angle drill head.
Almost the only solution, for the early cars.

Porsche didn't go to a 6 rib belt because they got bored.

Pretty unlikely a "V" belt will drive a 100 amp alternator....much less a 150 amp unit.
GregBBRD is offline  
Old 12-08-2016, 11:31 PM
  #43  
MainePorsche
Addict
Rennlist Member
 
MainePorsche's Avatar
 
Join Date: Jul 2011
Location: North Country
Posts: 5,654
Default

Greg, when will these units start shipping out ? Craig
MainePorsche is offline  
Old 12-09-2016, 12:10 PM
  #44  
GregBBRD

Rennlist
Basic Site Sponsor

Thread Starter
 
GregBBRD's Avatar
 
Join Date: Feb 2005
Location: Anaheim
Posts: 9,543
Default

Originally Posted by MainePorsche View Post
Greg, when will these units start shipping out ? Craig
Pretty amazing response to this product, Thanks to all that have ordered or are contemplating ordering!

As long as Bosch doesn't run out of new alternators for me to modify and I dont get more than 38 orders (the number of front housings i had produced), I can ship within a few days.

The first 10 orders will ship today/Monday/Tuesday, depending on Mary's ability to process the orders. I should have 10 more ready to ship by the middle of next week. Not all of those are currently spoken for.
GregBBRD is offline  
Old 12-09-2016, 12:38 PM
  #45  
hlee96
Addict
Rennlist Member
 
hlee96's Avatar
 
Join Date: Jan 2015
Location: Near Mushroom Capital of the World
Posts: 2,527
Default

Can I reserve one for my car?
hlee96 is offline  

Thread Tools
Search this Thread
Quick Reply: Ultimate High Output Bosch Alternator fits 1985-1995


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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: