JustRamIt91

Well... its been awhile since i posted here. Just would like to say hi to everyone and hope all is well.

I'm going to make this an update thread of whats being going on for the last few months and look for advise on some of the snags i've hit with my new-to-me truck.

For starters i popped off the stock turbo and threw a HE351CW onto it for a little while.. Man did that thing scream, nearly 50psi...at 3500rpms on the highway. But usually took my foot out of it once i got up around 40 for my headgaskets sake. (280,000) miles on the motor.

I had to take that turbo off and put the stock guy back on and just noticed its not building boost like it should. I bought a replacement compressor wheel and its the wrong size its nearly 5mm smaller in diameter and i didn't notice until i took it out for a spin. The numbers on the back of the wheel i took out of there are 3525398. It looks like the stock h1c compressor but there must be different size compressor wheels???

(also this is being typed from my ipad, i'll add pictures and videos when i get home)

Crossy's son

the Baby H1C on Non I/C trucks uses a 50mm compressor wheel, however there are 2 different measurements of the compressor wheel, the MAJOR and the MINOR, I can't remember which is which But one is the outside diameter of the blades (like what you see when the turbo is assembled) and one measurement is the back side of the wheel that you don't see when it's assembled.

Also I think some I/C H1C's had 54mm Wheels and some 56mm , It's not set in stone.......It sounds like someone screwed you by giving you a 50mm Baby H1C wheel???

dieselJon

H1C's compressors (intake. Turbine is exhaust) inducer (small part at the tips) is 50cm for the baby and 57 for the big one.

The exducer (large part) is the same iirc.

Sounds like you got a baby housing for a big turbo.

9MM

So which is better the baby housing or the bigger one I got the baby on my truck n can 27 pounds boost 30 if I stay in it.

JustRamIt91

Ok I kind of have the turbo straightened out. The compressor wheel was chewed up some so I straightened and knocked off the sharp edges. The wheel I bought was the smaller of the two. It spun too fast but still made 30psi in the wrong. Housing. The stock one is pushing 40psi now but sounds like...it sounds like I need a new compressor.

feets

You modified the compressor wheel?
Get it off your truck until you can replace it with a new part.
Grinding, polishing, and trimming all remove weight. When something is spinning 100,000+ rpm it had better be properly balanced.