Very true B20F...
I also figure many B/E heads may have had a skim by now..especially such as mine..which went in for Unleadeed work..so raising the compression a smidge more...
So I just run a high Octane fuel...and adding Tetraboost is way over the top...but since the engine was totally re-built less than 5000 miles ago..I want to look after it...adding lead should make it run a bit smoother..and I figure help cool Valves etc....
I currently have some Splitfire plugs in..which work really nicely...but will compare back to NGKBP6HS then to a 7HS in the next few weeks....I get a very slight run on with Splitfires..so will try 6's first..then up to the 7's..
J
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