5.9L Rotary Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps Related To Performance And Longevity

Garrett GT37R

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Old 05-15-2012, 05:45 PM
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Default Garrett GT37R

Hey guys,

Any 1st or 2nd gen 12v guys using this turbo? My truck is already set up with the he351 and have a chance to get a new garrett for a good deal. The turbo is a direct replacement for a 3rd gen and everything lines up with my current he351, except I'm not really sure about how the coolant lines are routed (1st Gen lines vs 3rd Gen lines). Also I still have stock injectors at 192,000 but have ordered some SDX 5x.012s. I think the 5x.012s and the garrett would be a good match. Am I wrong? All opinions welcome.

Thanks
Brad
 
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Old 05-18-2012, 08:15 PM
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I'd say yes. I ran 5 x 13's with an HE351 for awhile and the truck ran very well. The GT37R probably out flows the HE351 too.
 
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Old 05-19-2012, 12:50 AM
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Thanks for the response. This one seems to stump people since not many 1st gen guys run Garretts. I bit the bullet and bought the turbo. Finished putting it on tonight. Really happy with it. Little less boost through the gears, but when I push it the boost is instantaneous compared to the he351, and that's with stock injectors and a larger exhaust housing. It's supposedly a .89AR and I calculated that to be around a 12.3CM^2 housing compared to the 351s which are said to have a .65AR or 9CM^2 housing. I think the ball bearings really cut down on the impellers rolling resistance. If I listen carefully, I can hear the turbo still spinning for about 6 or 7 seconds after truck is shut off. Now I all I need is more fuel. Getting anxious for the new injectors to arrive, especially now. An added bonus is the turbo whistle that I lost with the he351 is now back with the Garrett.
 
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Old 05-19-2012, 11:59 AM
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I replied you your post on CF. There is no linear formula to convert A/R to a cm^3 number.

A few 3rd gen people run Garretts, as garrett makes kits for their trucks. I thought about it too for awhile, as it would be nice to have a very quick spoolup to match the VE's strong low rpm fueling capability. soot4brains on DTR runs one I think.
 




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