MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Pertronix Ignitor for Distributor
Posted by: donfaber
Date: November 12, 2021 12:32PM

I have a 79B with 3.9L Rover V8 - it has what looks like a Delco-Remy Distributor, but no name tag that I can find. I want to install the Pertronix Ignitor. How can I find out what Distributor I have to properly select Pertronix parts?
V8Dist1.jpg
V8Dist2.jpg
V8Dist3.jpg


DiDueColpi
Fred Key
West coast - Canada
(1333 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

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Re: Pertronix Ignitor for Distributor
Posted by: DiDueColpi
Date: November 12, 2021 05:48PM

You have the small cap delco distributor.
PN 1181ls or 91181ls will fit.(1957 -1974 gm delco dist)
However for a few dollars more you can get a brand new billet pertronix vacuum advance dist. complete with cap and rotor. Speedway has it for $288.00
Make sure to match up the coil, or use theirs to prevent burning out the module and preserve the warranty.

Cheers
Fred


donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: November 13, 2021 09:28AM

Thanks!


MGBV8
Carl Floyd
Kingsport, TN
(4284 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

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Re: Pertronix Ignitor for Distributor
Posted by: MGBV8
Date: November 14, 2021 10:43AM

I would keep that Delco.


donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: November 14, 2021 02:15PM

That's my current plan....


MGBV8
Carl Floyd
Kingsport, TN
(4284 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

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Re: Pertronix Ignitor for Distributor
Posted by: MGBV8
Date: November 15, 2021 12:12PM

I have been using my OEM 1963 Buick 215 distributor for 20 years without issue. The last 18 with a Pertronix module in it.


donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: November 16, 2021 06:13PM

thanks, Carl



donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: March 26, 2022 12:55PM

Just started installing the 91181LS ignitor in the Delco distributor installed in the 3.9L V8 - the screws that came out holding the points/condenser in place are a bit smaller than the new screws provided with the ignitor. And when I try to install the ignitor per Pertronix instructions (Location) it doesn't quite fit (but almost!). Any comments? I'd almost think the Delco Dizzy has metric dimensions while the pertronix ignitor is expecting english units? Suggestions, please.


MGBV8
Carl Floyd
Kingsport, TN
(4284 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: MGBV8
Date: March 27, 2022 09:30AM

Mine is the 91181 Ignitor II. Fit fine in my original Buick 215 dist. That was a long time ago. Heck, they may be made in China now.

If the unit does not line up with the holes in the breaker plate, I would pull that distributor & find the model numbers. You need to know exactly what it is. Might be an offshore Delco replacement?


donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: March 27, 2022 01:13PM

Thanks for the tips, Carl.


donfaber
Don Faber
Columbus, IN
(87 posts)

Registered:
10/31/2007 10:53PM

Main British Car:
1979 MGB 3.9L Rover V8

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: donfaber
Date: April 15, 2022 08:37PM

I mentioned the 91181LS doesn't fit in the Delco Remy installed. I've learned the braker plate came in multiple variations. In the attached pic, you can see the ground wire welded to the plate interferes with mounting the ignitor flat. There is also a pin to the left where the mounting screw should go. Any comments? There is no model number in the casting.
Breaker plate # is 1 M 7 1111007; Vacuum Advance is M 182 16

Any suggestions for replacing the whole dizzy in the 3.9L Rover shortblock that I bought in 2007? I've sent the unit to Jeff at Advanced Distributors for help.
IMG_20220331_142739499.jpg


Moderator
Curtis Jacobson
Portland Oregon
(4526 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Pertronix Ignitor for Distributor
Posted by: Moderator
Date: April 16, 2022 12:51PM

Quote:
I've sent the unit to Jeff at Advanced Distributors for help.

You're in good hands.


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