Upgrading to spark control

[BruceHislop]

Hi All,

I'm helping a local club member upgrade his EBL equipped EFI to Electronic Spark Control (ESC).  When I did mine 12 years ago, I just bought one from a mid-late 80's olds 307 car. 

He wanted a new distributor so he went to NAPA and they gave his this number DIS41897.  When I look that up and check the applications it shows mid 75-80 Chev and GMC pickups/vans, nothing about Olds.  I thought that era was HEI with no ESC yet, however the photos show an ESC distributor. 

But when I look up an 87 Oldsmobile car with ESC it shows the same part number for the Distributor.  Also, doesn't the distributor turn backwards so it needs a different gear?

Just wondering what the group says for a ESC distributor for a 455.

-- 
Bruce Hislop

[Jon Roche]

Here is the one in my gmc:

https://www.amazon.com/Cardone-30-3801-Remanufactured-Domestic-Distributor/dp/B000C453YW/ref=dp_prsubs_sccl_1/145-0697684-5237844?pd_rd_w=sia0N&content-id=amzn1.sym.e9377b89-909e-45c3-be60-d2d3b9e35935&pf_rd_p=e9377b89-909e-45c3-be60-d2d3b9e35935&pf_rd_r=7VCSRWZVM5FK4HA0X1VV&pd_rd_wg=U7ThK&pd_rd_r=8fda182c-01c8-4051-86e1-3b4304e2c843&pd_rd_i=B000C453YW&psc=1

On Nov 24, 2023, at 11:54 AM, BruceHislop <bhis...@gmail.com> wrote:

 Hi All,

-- 
Bruce Hislop

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[Bill Van Vlack]

I understand that any GM HEI distributor, including ours, can be converted to a suitable distributor by disabling
vacuum and mechanical advance and installing the correct control module. (Quoting from Swartzendruber).

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[Eelko Byker]

I bought a used Olds 307 distributor on e bay when I did mine last winter  it is a large cap coil in cap  HEI distributor the one in the amazon link does not look anything like the one I used and our distributors are opposite rotation  to a Chev  you have to  get the right  one or modify  the one you have there are utube  how to video's   

[Dick Paterson]

Yellow /red   coil  for gmc app…   fwd ……………..rotation is determined by which side of the camshaft gear ---the dist gear engages…..dick

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[BruceHislop]

Hmm, Jon, That does not look anything like what I have ever seen!

Bruce Hislop

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[BruceHislop]

Looks like a Cardone 30-1873 would be a good choice.  Rebuilt covers 80's Olds 307 engine with ESC.
https://www.rockauto.com/en/moreinfo.php?pk=27808&cc=1421547&pt=7108&jsn=832

Bruce Hislop

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[Jon Roche]

Ok.  Amazon link is messed up. 

Sorry.   That should of been the 30-1873 distributor.  

On Nov 24, 2023, at 8:10 PM, BruceHislop <bhis...@gmail.com> wrote:

 Looks like a Cardone 30-1873 would be a good choice.  Rebuilt covers 80's Olds 307 engine with ESC.
https://www.rockauto.com/en/moreinfo.php?pk=27808&cc=1421547&pt=7108&jsn=832

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[George Beckman]

I’ve used Cardone 30-1873 in my 455 for about 80K miles. Amazon says they are out right now. I think you can get them from Autozone and the like. You may have to round up come connectors. The three pin connector to the module was part of a giant harness mess. I was lucky to find one in an ancient rural junk yard, and snipped it out.

On Nov 24, 2023, at 6:22 PM, Jon Roche <lqqk...@gmail.com> wrote:

Ok.  Amazon link is messed up. 

Sorry.   That should of been the 30-1873 distributor.  

---------

Best Wishes,

George
gbec...@graestone.org

[Jon Roche]

That is a good point.    I had originally bought a distributor from the local junkyard.   Olds 307 from mid 90’s i think.  Like cutlass wagon???  

It was cheap, like $10.  But it looked like a $10 junk yard distributor….  So I bought the cardone rebuilt one.   Luckily I had the junkyard one for the small wiring harness as from what i found out I dont think you can get  that pigtail thing new for the 7 pin?   

On Nov 25, 2023, at 9:57 AM, George Beckman <gbec...@graestone.org> wrote:

I’ve used Cardone 30-1873 in my 455 for about 80K miles. Amazon says they are out right now. I think you can get them from Autozone and the like. You may have to round up come connectors. The three pin connector to the module was part of a giant harness mess. I was lucky to find one in an ancient rural junk yard, and snipped it out.

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[George Beckman]

I couldn’t find one. My clipped out pigtail would embarrass any pig who had to wear it. That part of the system is what I call a Beckman Wad-up. After 80K, it seems to be holding together.

On Nov 25, 2023, at 8:04 AM, Jon Roche <lqqk...@gmail.com> wrote:

It was cheap, like $10.  But it looked like a $10 junk yard distributor….  So I bought the cardone rebuilt one.   Luckily I had the junkyard one for the small wiring harness as from what i found out I dont think you can get  that pigtail thing new for the 7 pin?