02:08:26pm, Monday, May 12, 2025
Gt42
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5.9 Cummins
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Hi I was wondering if someone could steer me in the correct direction, I have a 5.9 12 valve motor mechanic pump 800 cc fuel, I have a 3x3 Precision turbo, what size exhaust housing should I run 1.28 or tighter on this? I am hoping to run down the track at 5000 plus rpm. No intercooler but have water injection. Thanks |
Re: Gt42
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??
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I was wondering the same thing? Has anyone ever ran a 3x3 Gt42 style turbo on a 5.9 Cummins? |
Re: Gt42
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Registered: 03/17/2017 Posts: 160 |
If you're going to try and run those RPMs I would start with the 128 my guess is you won't need anything less than a 115 |
Re: Gt42
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J BeGone
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101 housing. Maybe a 98. I would think 115 might be to big. Definitely not a 128 |
Re: Gt42
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Registered: 02/20/2013 Posts: 34 |
We ran a GT42 on a 5.9 cummins but were only allowed to run 3000RPM. Had a Harts 100 housing on it running 60lbs of boost. |
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