Holset turbo on my 5.7?
11-29-2005, 09:33 PM
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Holset turbo on my 5.7?
After looking at the turbos I had access to, I found two that were in very nice condition. One is from a 98 Cummins Ram and the other is off of a 03 Ram. I think these are both Holset turbos but from looking around on the web, I think they are different from each other. It looks like the older ones have a split port where the exhaust enters and the later models just have the single bigger port. Any other info on these turbos and which might work better for my JY turbo kit? What kind of boost would these support. I'm only looking for like 5-8psi with my setup, most likely intercooled. From what I could see both of them looked like they had built in wastegates, am I correct? Any help that you all could provide would be greatly appreciated.
12-04-2005, 02:32 PM
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I work with nothing but Holset turbos on Cummins engines at work. I have access to them, but im really not sure how well they would work becuase the impellar loooks different than your basic turbonetonic turbo.
12-05-2005, 11:10 AM
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if you do the math and see the compressor map you might be able to tell if this turbo will fit. I think there is a site called junkyardturbos.com, they might be able to help, but when I was thinking abhout this I could find little help/information. You just need your displacement and the rpms you are running-I wish I would have kept mine for the 6.0L but what I saw was most turbos must be custom to work, cause what the maps said was different than what the person representing them said. GT 35 way too small and the 67 is not on the map either...
12-05-2005, 11:45 AM
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You can run the Holset turbos off the Cummins diesels but you probably wont make a whole lot of power. For example, a stock diesel truck makes 200-350 horsepower and the compressor housings and turbine housings are sized to reach full boost rather quickly as diesels only turn a (stock) maximum of about 3000-3500 rpm. This being said, these turbos are really too small to work efficiently in the higher rpm range of a gasoline engine with the same displacement (ie. a 5.9L 360ci cummins HX35 turbo on a 300+ cubic inch gas engine) I have a brand new Holset H1E non-wastegated turbo that I plan to use on my 2004 Chevy ECSB 2500HD 4X4 6.0L. The H1E came off of a 8.3L Cummins 6CTA Diesel engine. It has about a .90 A/R compressor with a turbine housing that has a 4" outlet and 26cm2 which (by my calculations) translates to about a 1.05 A/R.
You could run twins or I guess you could always change the exhaust housing and put an external wastegate on it. Try these guys they have housings in larger sizes for the HX35.
www.htturbo.com
BTW: The stock exhaust housing on a HX35 is 12cm2. Holset doesn't measure in a/r, they use cm2. Your stock housing size is a 12cm2 FYI.
-Tanner
You could run twins or I guess you could always change the exhaust housing and put an external wastegate on it. Try these guys they have housings in larger sizes for the HX35.
www.htturbo.com
BTW: The stock exhaust housing on a HX35 is 12cm2. Holset doesn't measure in a/r, they use cm2. Your stock housing size is a 12cm2 FYI.
-Tanner
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