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Ignition Coils
Posted: Sat Aug 30, 2008 7:26 pm
by b97SSEi
Is there is a difference between ignition coils for a 97 n/a bonneville versus a s/c bonneville?
I'm 99% sure that on of my ignition coils is pooched and I want to test it out with a junk yard coil but they don't have any supercharged bonnevilles or grand prixs in there.
Re: Ignition Coils
Posted: Sat Aug 30, 2008 7:35 pm
by gonzo4191
there is a difference, but idk if it woudl affect you finding the bad one?
Re: Ignition Coils
Posted: Sat Aug 30, 2008 9:24 pm
by myfirstbonnie
The coils should be the same.
Re: Ignition Coils
Posted: Sun Aug 31, 2008 11:37 am
by willwren
There is a difference.
The 97 and newer L67 coils are a little 'hotter'. They can be identified by blue insulation around the primary sockets underneath.
They are interchangeable, but are not the same.
Re: Ignition Coils
Posted: Fri Sep 05, 2008 10:59 pm
by Whitecrystal1
willwren wrote:There is a difference.
The 97 and newer L67 coils are a little 'hotter'. They can be identified by blue insulation around the primary sockets underneath.
They are interchangeable, but are not the same.
I ask this question a while back on the old forum but never got a reply. Reading the Techinfo it was showing the resistance the same on both the primary and secondary sides for both types... what make the L67 hotter? Thanks
Re: Ignition Coils
Posted: Sat Sep 06, 2008 12:10 pm
by willwren
Something inside.
There are alot of factors. Smaller wire has more resistance. Larger wire diameter has less. So it may simply be a difference as simple as that. I've never dissected a coil to determine the difference.
In order from cold to hot:
92-96 L67, 92-94 L27, 95-05 L36. All use the same coil.
96-03 L67. L32 unknown, but most likely.
MSD 8224.
All three types are a small step 'hotter' than the previous listed. None will make a drastic improvement. I went from the weakest to the hottest, and noticed a slightly smoother idle and POSSIBLY smoother power through the midrange. Not more power, but smoother.