GM Ignition Types - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 09-18-2004, 02:35 AM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Sep 2004
Location: Canton, Ga
Posts: 253
Thanks: 0
Thanked 0 Times in 0 Posts
jlathem is on a distinguished road
Default GM Ignition Types

In my quest for better stuff for my Bonneville, I have read that good ole' GM has made several ignition sytems for our cars. The Magnavox, the later Delco ... and the even later ... uhhh better one ? I have also read that the MSD coils are the same as the " later, better hotter" one. Is this true ? I have happened upon all three. The ICM looks about the same on all three and the coils are different on the Magnavox. Other than that ... what are the differences ? More jolts ? Are they interchangeable ?

JLathem
1992 Bonneville SSEI

Long list of mod'* ... only on paper now.
jlathem is offline   Reply With Quote
Old 09-18-2004, 08:29 AM   #2
Senior Member
True Car Nut
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Well in the LG3 engine [found in '87 and early '88] had an earlier version of the delco setup. The connector for it WILL NOT interchange between the magnavox in later '88, '89, '90, or '91, nor the later Delco units. But you could bolt up some aftermarket DIS coils just fine to it, so there is no point in upgrading. In later '88, '89, '90, and '91 came the Magnavox system. I have it, and it sucks. This system is not compatable with the aftermarket DIS coils, but you can get an ICM from a later bonnie [92-95'* bolt right up to the stock bracketry]. The 92-96 [N/A and */C'*] all had the same setup. However, in '97, only the */C'd cars got the hotter spark coils [which is believed to be pretty much the same as the aftermarket MSD units, I would say MSD is better, but I have no proof]. The N/A'd cars still have the same setup, I believe. Make sense?


-justin
opensourceguy is offline   Reply With Quote
Old 09-18-2004, 02:16 PM   #3
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Good description, with the exception of over half the 92'* also got the Magnavox system. You can direct-swap to a Delco-II system. It'* been done before.
willwren is offline   Reply With Quote
Old 09-18-2004, 02:20 PM   #4
Senior Member
True Car Nut
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Are you sure it was half the '92s which got the magnavox system? I thought it was just the beginning few.. like the '88 with the LG3.


-justin
opensourceguy is offline   Reply With Quote
Old 09-18-2004, 02:24 PM   #5
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Sep 2004
Location: Canton, Ga
Posts: 253
Thanks: 0
Thanked 0 Times in 0 Posts
jlathem is on a distinguished road
Default

Quote:
The 92-96 [N/A and */C'*] all had the same setup. However, in '97, only the */C'd cars got the hotter spark coils [which is believed to be pretty much the same as the aftermarket MSD units
So given the choice of the three that I have ( Magnavox, stock 1992 Delco, or a later 1998 SC'd ) I need the later SC'd setup right ?
I want the most spark for the least money.

JLathem

1992 SSEI

Mod'*
Complete 1998 SC'd Ignition
jlathem is offline   Reply With Quote
Old 09-18-2004, 02:25 PM   #6
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Quote:
Originally Posted by opensourceguy
Are you sure it was half the '92s which got the magnavox system? I thought it was just the beginning few.. like the '88 with the LG3.


-justin
92 was an oddball mix. Some of the L27'* got a one-pice aluminum intake like the previous gens, some got no egr, some got magnavox. None of these differences seem to be inter-related. NONE of the cars that I know of got the upgraded valvetrain that came out in 93.

I've seen more 92'* with the Magnavox, no EGR, and aluminum intake than I have the other way around. By far.
willwren is offline   Reply With Quote
Old 09-18-2004, 04:14 PM   #7
Senior Member
True Car Nut
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Oh, okay, oddball is right.

jlathem: The Delco style ICM from a 92+ [delco.. remember that ] is all you need. However you do own a '92.. are you sure you have the magnavox unit? If you do, I'd suggest anything from 92-95 because it'll bolt right up to your bracketry. When i talk about the hotter, better spark from the '97 and up */C'd cars, that is within the coils not the ICM. So, you won't see a difference. Once you have the new ICM, get some MSD, Jeg'* [only availble through jegs {catalog or online}], Accel, Petronix [I believe they still make the DIS coils], and Mallory [sp?], these all cost over $100 for all three, unless you eBay it, I got three Accel coils on ebay for $30 [the price of one new one]. If you don't know which system you have, just post up a pic of your coils, anyone here can tell.. or if you can't, I can direct you to a pic of a magnavox and one of a delco.


-justin
opensourceguy is offline   Reply With Quote
Old 09-18-2004, 07:13 PM   #8
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

We've had bad experiences with the Accel coils (the yellow ones, right?). Premature failures.
willwren is offline   Reply With Quote
Old 09-18-2004, 07:21 PM   #9
Senior Member
True Car Nut
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

Hmm.. I've got accel ones. Damnit. How many people had premature failures and what year bonnies?


-justin
opensourceguy is offline   Reply With Quote
Old 09-18-2004, 11:01 PM   #10
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Dunno for sure. Only seen a couple here, and both failed. Don't remember who.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Lifter types in the 3.8L OHV matt95ssei Performance, Brainstorming & Tuning 8 10-21-2004 12:13 PM
Are there 2 different types of clear-coat on Bonnevilles?? GTP2SSEi 2000-2005 1 09-17-2004 12:11 PM
What types of Lights do I need for my 92 Bonnie nat1ve92SSE Performance, Brainstorming & Tuning 1 06-13-2004 03:02 AM
The 27 types of women revealed! MOS95B Lounge 49 03-25-2004 08:56 AM
For the Linux types... MOS95B Lounge 3 01-16-2004 03:27 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:03 AM.


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.