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Re: boost question
To be 100% safe, 14 psi. Some people will go 14.5 (like me) and even some as much as 15 psi but 15 is really not reccomended without first getting a datalogger to see if you are getting knock at that much boost. If you have a boost controller just keep it at 14 psi for the street and if you go to the track feel free to turn it to 15 to do a couple runs. Plus, after 14 psi, the stock 9B's get out of their efficiency range.
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