BILTIT

On a 93 it should be an 18cm.

Here is some good info and upgrades.

1988-1993 Dodge Cummins Turbo Upgrades

I would still recommend an he351cw (to BOBVA'S dismay), but it requires some work to install so some research is required.

gaberichison

So that's why it's so laggy

bobva

What part did you answer?

BILTIT

I guess you need to reread.

Or do i need to be extra particular for you when you are stirring the pot?


The 351cw has a wastegate, tighter exhaust housing and different turbine VS the upgraded H1C. These are some but not all the differences.

If you have any questions, speak to my lawyer.

bobva

Now I understand you dont understand the differences in the words upgrade and stock.
But then again your the guy that uses hammers and prybars to put shocks on his truck because you cant read a measuring stick either.

My upgraded H1c has a wastegate has tighter exhaust housing 12cm with a 4inch flange and a 60mm pin wheel

dan123dbl

From what I've read the h351cw still flows more than an h1c with a 60mm compressor upgrade and a 12cm exhaust housing.

I could be wrong though since I don't have any real evidence besides other people's words and experience

BILTIT

We are talking about the original posters upgrade thoughts, not yours BOBVA.

He was asking about the 60mm compressor wheel upgrade only, not a wastegate.

There are many things "upgrade" can mean, keep it in context.

I posted a link for the OP to see many of the available upgrades so he can decide what level of "Upgrade" he would like.


If you dont have anything helpful to contribute than dont contribute, period.

BILTIT

You are correct, the 4" outlet of the 351cw exhaust housing allows it to flow more volume than the 3" exhaust outlet of the H1C. This allows increased free flowing exhaust and a smaller housing (9cm2) for faster spoolup.

I do not know when or who designed the H1C 60mm wheel so i cannot truly say if it is better or worse than the 351cw wheel.

The compressor wheel and turbine wheel have to be looked at as a pair, they work together. You change the size of one and the other can feel it/be effected by it.

This is the magic of turbochargers, balancing both sides to work in unison while delivering the performance you are looking for.

dan123dbl

That's the way I was looking at it. 4" exhaust outlet and quite a bit newer turbo design.

Plus I'd be comfortable pushing an he351cw to 40psi, not so much an h1c.

BILTIT

Yup, i see 40psi with mine. I dont hit 40 very often and for very long but i have seen 35psi alot when pulling 12k behind me. (i am heavy on the go pedal)

1972RedNeck

HX35 exhaust housing will fit right on an H1C.

To quote myself:

The bigger exducer helps move more air. The cost of a 60mm upgrade could buy you a HE351CW - although they have been going up in price.

I don't know if you want my advice, but if you do, don't buy the upgrade. The HE351CW will spool faster, run cooler, and make more power.

Also, the upgrade kit has a 6 blade wheel while the HE351 has a 7 blade wheel. The 7 blade wheel can move a little more air at slower turbo speeds - same wheel as a Super HX40

gaberichison

I was asked howhat many blades my inducer wheel was, both my h1c and my hx35w are both 8 blades, does that sound normal??

dan123dbl

Yes it does

VIN#Diesel

Overall, I think OP's problem is that he is obsessed with upgrading his turbo. That's the whole problem either way. Original turbo was performing better.

Far more (free) options to make power on a 93 than replacing the unbroken factory turbo right off the bat. From what I read, he hasn't even adjusted to fuel pin or fuel screws? Am I reading that correctly?

IMO...
First- fill out your sig so that we can see what is actually done to the truck
Then- boost and pyro gauges so that you can see a bit of what is happening.
Next- BHAF, exhaust, and fuel screw/fuel pin tweaks (both free)

30 psi on the stock turbo and injectors is easily doable and with safe EGT's. Only after this is done and you are running right and still need more should you be looking at injectors and a turbo.

My advise would be to go back to your original turbo and properly upgrade. No more "the gauge is on the way". My response... "great, don't touch anything until it's installed."

gaberichison

I don't plan on touching anything until then anyway, I have a denny t stage 2 fuel pin and pump is turned up a little, I also have some ddp injectors about to go in, figured with all the extra fuel I'm throwing at the engine it would be helpful to add some more air too