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      01-18-2013, 09:40 PM   #1
Lifted07Duramax
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Drives: 2008 BMW red 335i coupe
Join Date: Jan 2013
Location: springfield, mo

Posts: 1,329
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Why do people recommend map 1 over 2 on a JB4

My 335i is 100% stock other than the JB4 and running 93 octane. The guy who installed it put it at map 2 and said that is where I would want it. But after reading on here that it is too aggressive for a stock car? And that I should be running map 1? Is this true?

If so why is it that you can get a DCI, intercooler and downpipes and then the map 2 is ok?
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