TR5 same as TR55?
12-30-2010, 09:48 AM
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TR5 same as TR55? Title says it all. I will be doing a cam swap soon and will be changing the plugs while I'm in there.
Yes, I have searched, and I came up with several different answers, ranging from they are just factory gapped different to they have different sized electrodes, etc.
And while on the topic, what gap would you recommend for a 228R & headers (a tune ofc), practically everything else stock? I've heard .035 all the way to .060
Yes, I have searched, and I came up with several different answers, ranging from they are just factory gapped different to they have different sized electrodes, etc.
And while on the topic, what gap would you recommend for a 228R & headers (a tune ofc), practically everything else stock? I've heard .035 all the way to .060
12-30-2010, 10:30 AM
#2
Yes, same plug just gapped differently out of the box.
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12-30-2010, 11:15 AM
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12-30-2010, 11:35 PM
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I believe the original spec was .060 when our cars were new. GM then issued a revision for gap to be around .035. I have run .060, .055, .050, and .045 with no changed noticed between these.
12-31-2010, 02:04 AM
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But there was no revision issued for gapping of platinum or conventional tip plugs on this engine. The smaller gap was just for the iridiums (#12571164).
