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Message: <blockquote data-quote="the.greg" data-source="post: 1039136" data-attributes="member: 11226">Get it tuned or use something to check the afr at wot, or atleast datalogged?  A lightning stock is pretty darn safe, even with the crappy rods. The trouble is when you pulley for big boost increases without a tune to keep the afr safe. If all its making is 10psi I'd feel fairly safe, but also consider that on a nice cold evening that could be pushed to 12psi which would make me worry if I was unsure of the tune. I'm assuming it has no CAI or exhaust mods? Either of those could explain 10psi, but otherwise I'd check the pulleys or see if a chip is plugged onto the ecu.</blockquote>