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- 28 November 2009
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We prefer the NGK Iridium No. 7 (up to 425 bhp) or No. 8 (425 bhp +) depending on power level for boosted NSX. The factory plug has a gap of .044". Gap the plug down from .044" by approximately .004" per 50 bhp added from factory power.
The No. 7 plug comes pre-gapped at .044" and the No. 8 plug comes .032". Adjust the gap carefully as to not break the fragile electrode based on the above information.
http://scienceofspeed.com/products/engine_performance_products/NSX/NGK/NGK_Spark_Plug/
Does this rule still apply for Methanol injection or do you reduce the gap even more?
Taken from SOS website
"
Heat range No. 7 pre-gapped at .044" and No. 8 at .032". Adjust plug gap from factory specification (.044") approximately .004" less for every 50 bhp added. For example: an application adding 150 bhp would require a .032" gap (.044" - .012")."
My plugs are gapped to the stock .044 i believe, i have added around 150bhp as the example suggests, so mine should be gapped to .032" even with methanol in the mixture would .032" still be right?
My plugs are gapped to the stock .044 i believe, i have added around 150bhp as the example suggests, so mine should be gapped to .032" even with methanol in the mixture would .032" still be right?