Quote:
Originally Posted by DanEC
You can take this for what it's worth - but I could not talk Keith Craft into going above 9:1 with iron heads on my stroked 428. I felt this was overly conservative and wanted around 9.5:1, but he would not relent.
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Probably largely due to the poor gas quality now. But for years I ran iron at 10.5 on 93 octane at 38 degrees.