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snellcustoms 09-19-2007, 01:10 AM I have a 2003 duramax and i was woundering what the max boost is for a stock turbo, if the motor was already built with all aftermarket parts? so far i reach anywhere from 37-41 psi i have ran it like that for about 20,000 miles and have had no problems yet with the turbo end of things. Hammer 4 09-19-2007, 01:13 AM Stock turbo will not last long at anything over 32.. Do you have a boost gauge..? snellcustoms 09-19-2007, 01:27 AM it has a pyrometer and boost. i know thats what it is reaching, i took it off my motor and had it rebuilt just in case, the parts will still be oem but im looking for a good long term psi to run. jcool 09-19-2007, 09:26 AM it has a pyrometer and boost. i know thats what it is reaching, i took it off my motor and had it rebuilt just in case, the parts will still be oem but im looking for a good long term psi to run. 30 sounds like a good even number.......... | ||