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| Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines |
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What is the most boost you can hold in a 6.5 motor and safe to run it at..How much until shit starts breaking?... JOIN NOW TO REMOVE TRACER
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#2
11-24-2009, 01:21 PM
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well in a stock compression 6.5 i would not go over 14 psi. with headstuds maybe 16 17 psi max. with compression reduced to 18:1 i would not go over 30 psi.
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#3
11-26-2009, 06:05 PM
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Totally stock i would not go over 9psi, your truck is supposed to defuel at 10psi, mine defuels more like 11psi. On a chipped rig you can go up to 15psi, anything over that is not efficient for these turbos....
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#4
02-11-2010, 10:03 PM
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you might be lucky to build 13 with a stock charger
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#5
02-12-2010, 12:01 AM
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are you kidding me. people put out 15 psi all day on the gm x series of turbos. some even go to 17. one idiot went to 20. where you getting this info
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#6
02-12-2010, 07:07 PM
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I would not go over 15. Had a friend clamp waste gate shut on a 92 6.5 it would bury a 15psi gauge. It ran for along time like that till he sold it. I would not recommend doing that.
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#7
02-13-2010, 01:31 AM
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i would not recommend it either. especially if you tow or have lots of hills. once you put a large load on that engine without a operating wastegate it will start to overboost or hopefully eventually defuel. do yourself a favor and run a wastegate.
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