3406B turbo upgrade

The 177148 will work with any setting I believe the 199119 likes some fuel to get it turning. Turbos are not cheap and I can understand wanting to make the right choice. As much as I liked the 460 turbo I ran that truck was doing a completely different job. Had @Oxbow not mentioned that I feel like I was probably fixing to give bad advice or at least lead you down the not ideal path

 

we put a 171702 on my buddy's 7fb runs fine.

 

Most likely 6960 if it’s original

 

I have two of the stock turbos if they are of value to anyone. They each started to leak a bit of oil and that is when I started upgrading. One of them is an OR6957, and I'm pretty sure the other is also. They were both working fine when we pulled them, except for the oil leaks.

 

SIS says OR6953, or 119-8517 is what it came with, at least if I'm reading it correctly.

 

I got close about 3 digits off not too bad for scenile and sliding

 

The SIS system has a lot of options, but that is what was highlighted. I got no clue which is correct, and I wasn't trying to correct you!

 

I have been known to be wrong. Idk why but I think I’ve seen that 6960 number laying around my place a lot. It seems every thing runs in spurts like nothing but 7fb’s for a while then all 3ZJ’s and currently were on a 4MG kick. And now that I’ve sit and talked it out the 4MG that 6960 is off of had peec controls. I guess someone had a peec go down and replaced it with a 4MG. Had a C peec pump which has a fantastic cam but I bought it without checking. I was a little let down it was a 4MG only cuz I needed a big crank for another project. At their age no way of knowing what’s been changed through the years that motor was proof of that. I ain’t sure what the difference is in some of those older turbos honestly