I have a 1990 d350 with 50 horse pods, ice box cold air full system, 4 inch turbo back, tuned pump. I have ordered an hx35 hybrid to put on, what do you all think about the outcome? im here to learn all i can and know quite a fair amount on these motors. Just here for any input you all may have because i am always open to learn something new. Let me know what you all think and what difference i can expect being non inercooled running factory h1c. thanks for anything you may share

 

A loss of turbo lag and a slight increase in EGT. The big difference between the 2 turbos is on the exhaust side. The turbo will spool faster, but the trade off is a higher EGT. The help comes in the form of a slightly larger compressor pushing more air through. If you keep the fuel turned down, it will be quite manageable.

 

Thank you very much, on power side what would a logical increase be?

 

Hard to really say because there are so many other variables. You will feel a performance increase. Oddly, you may or may not see a boost increase. You may even see a decrease in boost. Not to worry because it is being made up for by air volume. That was the situation with my 91 when I went to a bigger turbo. But remember to re-tune the injection pump to the components you change. If you don't you could wind up with a worse running engine or just no improvement.

 

So would it be worth while upgrade? Definitely wake the truck up?

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Just wondering because you have the larger h1c(54) I believe being a 91.5 intercooled and I have the smallest h1c being the 50. So this being said would it be worth it to make the switch?

 

May kill your mpg if you care about that? will be faster off the line! I don't know the difference in exhaust sizes between the two...I don't think egts will change much cause you have the small h1c right? so the new one will push more air?

 

It would be. I wouldn't hesitate to do it. My turbo upgades were in stages. First went to a smaller exhaust housing which got rid of the lag and gave me 2psi more boost. Then did the compressor upgrade that gave me another 5. At that time I was running 5X.012 marine injector nozzles. Put on a 4" exhaust and it killed the performance. Upgraded to a 62/65/13 and brought it back to life, but lagy and smoky. I lost 5psi boost, but gained power (the volume thing).

With all the mods I've done, I still got 18-21. My latest mod, 7X.010 injectors have taken it to 24.

 

I have the smallest h1c(the 50). So hopefully I'm looking at much greater performance and air volume.

 

You will be happy with it.

 

Thank y'all so much for any input you shared. Any other mods I should do? I'm looking for 400 at the wheels. Lets me know what you recommend