AC Delco changing recommended plug for LS1
09-28-2013, 06:48 PM
#1
AC Delco changing recommended plug for LS1 It looks like AC Delco is changing their recommended plug for our stock LS1s from the iridium 41-985/41-110 to the platinum 41-962:
http://www.acdelcotechconnect.com/pd...-news-2013.pdf
What are your opinions on this? Naturally the platinums are a little cheaper but what are the tradeoffs? lower performance, colder plug, etc...?
I think originally our LS1s came with 41-974 from the factory which I think is a platinum plug just with a different gap, but then was changed to iridium by this TSB [#03-06-04-060 - (10/24/2003)] right?
please don't just say "use NGK" or something like that, I'd like to keep this specific to this AC Delco memo.
Thanks
http://www.acdelcotechconnect.com/pd...-news-2013.pdf
What are your opinions on this? Naturally the platinums are a little cheaper but what are the tradeoffs? lower performance, colder plug, etc...?
I think originally our LS1s came with 41-974 from the factory which I think is a platinum plug just with a different gap, but then was changed to iridium by this TSB [#03-06-04-060 - (10/24/2003)] right?
please don't just say "use NGK" or something like that, I'd like to keep this specific to this AC Delco memo.
Thanks
Last edited by wssix99; 08-09-2016 at 09:56 AM. Reason: fixed broken link
09-29-2013, 06:41 PM
#2
The document you posted stated both plugs meet OEM spec, so I would assume to say there is no difference in terms of performance. Probably just a way to slowly phase out the older plug by making the new one compatible with current production and older vehicles. Not really smart business to keep numerous plugs on the shelf when one will satisfy all requirements.
09-30-2013, 06:33 PM
#3
The 2003 TSB was necessitated by the overwhelming warranty repairs for poor idle, especially on the Corvettes.
This new TSB has nothing to do with engine performance. ACDelco realized the iridium plugs priced themselves out of the market. They want more market share, so they introduced a new, cheaper plug.
This new TSB has nothing to do with engine performance. ACDelco realized the iridium plugs priced themselves out of the market. They want more market share, so they introduced a new, cheaper plug.
09-30-2013, 09:18 PM
#4
The 2003 TSB was necessitated by the overwhelming warranty repairs for poor idle, especially on the Corvettes.
This new TSB has nothing to do with engine performance. ACDelco realized the iridium plugs priced themselves out of the market. They want more market share, so they introduced a new, cheaper plug.
This new TSB has nothing to do with engine performance. ACDelco realized the iridium plugs priced themselves out of the market. They want more market share, so they introduced a new, cheaper plug.
10-01-2013, 05:14 AM
#5
Originally Posted by ACDelco
These plugs fall into the family pricing matrix for double platinum and iridium plugs. The 41-962 will be less expensive for older applications and will keep ACDelco competitive in the IAM.
