Also guys you have to remember that there are different designs for turbine wheels, some flow more than others even though they are the same size. I have not had both turbine wheels side by side to compare but it is possible that the turbine wheel on the newer turbos will flow more.

Hammer, I opened up the wastegate on the third gen HE351. I will control drive pressure with the wastegate. The compressor on the HE351 is 6mm wider than the HX. It will flow more mass of air more efficiently. My current setup has enough exhaust drive pressure "Just measured 75psi today" to build 43 psi boost with my HX. I can actually maintain 40 psi with the HX's wastegate open and exhaust drive pressure reading anywhere from 50-55 psi. What I am getting at here is that I have enough "Shaft HP" to max out the HX's compressor with 55-60 psi drive pressure. If I apply the same "shaft HP" to the more efficient HE compressor, I can gain airflow with the same drive pressure, so really all that I need to do if figure out a way to bleed off my excess drive pressure that hurts/chokes the engine. *My solution, bigger wastegate.

So the short of it, I do not know if a 9cm 3rd gen housing will or will not outflow a 12cm HX 2nd gen housing. Even more important IMO, I do not know if a 3rd gen turbine will out flow a 2nd gen turbine. But I do know that my modified 27mm wastegate will out flow the HX's 19mm wastegate. If you do the math, a 27mm will flow exactly 2x more exhaust flow than a 19mm one.

True, if the 12cm and 9cm have identical flow characteristics, then the 9cm will flow 33% less than the 12cm. So it stands to reason that a if every exhaust flow property/ efficiency ratio are equal, the 9cmer would need a bigger wastegate.

No one knows for certain if this will work, that is why I am going to try it. It will be difficult to know/compare how much benefit or loss I achieve but that is why I am currently measuring drive pressure so I can compare that.

A dyno would be great, but dynoing both setups in the same day on the same dyno is more than I can achieve or pay for.

 

Must be a British thing...

 

Alright, I finally mic'ed this 3rd gen turbo.

HE351= 7 blades, 60mm inducer 88mm exducer.

HX35= 7 blades, 54mm inducer 78mm exducer.

HTT hybrid 40/35 = 6 blades, 60mm inducer 83mm exducer, 420 ish HP max.

 

good luck blue, let me know how that works out for ya, im gonna do the elbow tis weekend and ur version of a boost gauge lol

 

Yeah, that cheap gauge rattles a little when you are barely making boost. It is a little annoying, but for 16 bucks, you can't go wrong.

I got this 3rd gen turbo installed today, I haven't taken it over 16 psi boost cause I discovered that I have fuel mixing with my oil. I pulled out 16 quarts of oil today when I know I started with 12qts just 4000 miles ago.

https://www.dieseltruckresource.com/...d.php?t=194879

 

I know this is a 10 year old thread just curious what you found out when you slapped it on
there doesn't seem to be much info on porting the 3rd gen he351cw exhaust side , or results
thx

 

Big Blue hasn't made a post here since 2012.
I don't think he will see this question.