2007年7月26日 · Also NGK specifies the TR55ix with the 0.044" gap for the 2000 LS1. Further supportive of the 0.044" gap is the NGK TR55ix (iridium) plug has a 4.6k ohm resistance, versus one old AC/Delco 41-906 (platinum) plug has 1.6k ohm resistance. Obviously, A smaller gap would be required with a higher resistance plug.

2005年2月3日 · C5 Tech - NGK TR55 OR NGK TR55ix ?????????????? - I am running the delco plat plugs now. The referalls seem to lead towards the ngk but for the TR55 OR TR55IX? There is a huge differance in price. I know the ix is an iridium plug. I'm going to change the wires to probably to the msd's. Thanx in advance for the...

2005年1月13日 · C5 Tech - NGK TR55IX iridiums have different LS1 gapping recommendations. Anyone know why? - According to the NGK website, recommended gapping for the TR55IX is .050 for 1997-2000 LS1s and .060 for 2001-2004 LS1s and LS6s... interesting. I hadn't realized before now that the recommended NGK gapping was different for...

2006年10月18日 · C6 Tech/Performance - ngk tr55ix gap - anyone know what gap to use on the ngktr55 iridium plugs .

2008年5月6日 · C6 Tech/Performance - Don't Buy Ngk Tr55ix Spark Plugs - OK, i ordered NGK55IX spark plugs for my car. it comes pre gap at .059. the web-site says gap it to .044. i gapped it to .041 and some one told me i should not gap it more oR less than .008? so i called the tech dept at NGK and they told me i must replce it with...

2008年9月12日 · C4 Tech/Performance - NGK TR55ix Gap...the real thing? - Hi everyone I have a friend who is a little down on his luck. I did a search and came up with 0.35 to 0.65 as a gap for these plugs??? I am working on getting his 94 running a little better for him. I put new plug wires and TR55ix's in it and now it has a miss...

2007年4月30日 · C5 Tech - If you are running NGK TR55IX, what is your gap - OK, you may have seen my other post, but I just wanted to check and see how many people are running the NGK TR55IX plugs and what gap you are running. I gapped mine at 44 and now it seems I have a small backfire. Is this because it is to tight of a gap and is...

2003年4月25日 · C5 Tech - Gap for NGK TR55IX spark plugs??? - My manual calls for a .065 spark plug gap, but I saw .050 listed for the NGK spark plugs. For those who have installed these, do you still gap them to the factory spec. or to the NGK spec?

2003年7月21日 · Re: What's all the fuss about TR55IX plugs? (Richin Chicago) I don't have the iridium plugs, just the regular copper TR55's, but the car did seem to run a little smoother after the change at 32K miles.

2015年4月20日 · The previous AC Delco plugs were the 41-931 (gap .60). They have been replaced by the AC Delco 41-110 (gap .40). You can also use the NGK TR55IX.