Turbocharger mystery

[Chase Chapin]

So I've been looking at replacing perhaps upgrading the turbo in my signature truck due to a warp on the turbine flange, but I cannot get a straight answer as to what turbo I'm trying to replace. Fleece Performance says based on my VIN need the 03-04 turbo (HE 341 I believe) and also a lookup on Cummins Parts by ESN says I have a HE341 also, however, the data plate on the cover says I have the ISB 325, which is the high output "600" engine I'm pretty sure. So I thought I'd pose it to you guys... Do I have an HE 341 or HE351CW on my truck? Is it possible that the older turbo was mated to the newer engine or do I in fact have the 351? What's the easiest way to tell? Any advice or help is much appreciated!

 

[BigPapa]

Pretty simple to ID the HE351CW. It has the electronic solenoid for the waste gate.

 

[Chase Chapin]

Scott, thanks to your info, I did a quick crawl-under and determined that I have the HE351CW, and apparently Fleece's info is incorrect, as my truck VIN is supposed to have the 341 (10th digit is a 4 and supposedly anything 4 and lower is the 341). Thanks for the quick reply, it saved me several internet searches haha!

On a side note I noticed you also have a 351CW on your 12 valve...how did you mate the electronic turbo up to that non-computerized engine? How does it perform?

 

[BigPapa]

The 10th digit designates it’s a 2004, but, 2004 was a split year.

It’s better than the HX35. Spools quicker and EGTs are lower.

I took the actuator off and fabbed a spring gate. It opens @ 35psi. You can’t see it in these pics, it’s on the bottom. It’s basically a tab with a spring off a Yoshimura motorcycle exhaust from the tab to the lever.

 

[Ozymandias]

Anything else aside from changing the Turbo itself to help a 24V to spool faster and have more boost at a lower rpm?
My buddy is quite envy on my 3rd Gen with full boost at 1800rpm whereas he needs at least 2200rpm.