h1c wheel sizes

[redneckaggie]

the wheel sizes on the h1c are 54mm comp and 83mm exhaust for the intercooled turbos and 50mm comp 83mm exhaust for the non intercooled turbos i dont know if anyone can compare this to the kits on our trucks but we finally have some #'s to play with

 

[kas83]

the wheel sizes on the h1c are 54mm comp and 83mm exhaust for the intercooled turbos and 50mm comp 83mm exhaust for the non intercooled turbos i dont know if anyone can compare this to the kits on our trucks but we finally have some #'s to play with

Get the full inducer and exducer measurements on both wheels, so that you can make a decent comarison, or look at other upgrades. Also the blade pitch and curvature makes a large difference too. I will find some of the measurements later on another forum if I have a chance.

 

[redneckaggie]

that is the only measurments i could find. if you know anyone that has a first gen cummins that is the turbo that should be on there. I really want to get some comparisons to see what the similarities are but i am not that turbo savy and will not have the turbo handy until i get back home in a week or two. I have also heard that the hx 35 and the h1c are basically the same turbo

 

[kas83]

HX35 and WH1C are comparable, but not the same. I will do some digging later on and see what I can find.

 

[redneckaggie]

awesome because i know big dave got an h1c with a 16cm exhaust housing and i have one with an 18cm exhaust housing and i am wondering how they compare on paper. Once i start my job we will find out how well they actually work.

 

[kas83]

I believe you have the incorrect numbers in your first post, or rather what they apply to.

H1C non IC - 50 mm inducer(small side) 83 mm exducer(large side) on the compressor, 70 mm inducer (big side) 60 mm exducer (small side) on the turbine

H1C IC - 56 mm inducer, 83 mm exducer on the compressor, 70 mm inducer, 60 mm exducer on turbine

WH1C - same as IC H1C, with a 12 cm wastegated housing

94-98 HX35 - 54 mm inducer, 83 mm exducer on the compressor, 70mm inducer, 60 mm exducer on turbine

98.5-02 HX35 - 7 blade 54 mm inducer, 78 mm exducer on compressor, 70 mm inducer, 60 mm exducer on turbine

Turbine wheels were the same throughout the H1/HX versions used on a 5.9, and turbine housing from 12 cm to 21 cm are interchangeable. H1 series turbo has a clamp that attaches the compressor housing to the removable backing plate on the centersection, and HX series has a snap-ring that attaches to an integral backing plate.

The numbers are the best I could come up with from a couple different vendors, and from searching a couple of other forums. If they aren't right, I'm sorry, but they should be pretty close.

 

[kas83]

FWIW, I have a blown WH1C, working HX35, blown non-ic H1C, and a few S200's off 3126 Cat's in the garage that I could play with and try to get working, once the weather warms up.

 

[redneckaggie]

ok well i would think that they would be easy to put on since they are the same turbo flange. I dont know enough about turbos to find out how they would spool considering the difference in displacement of our engines even if i had all the numbers. I have rode in a turbo 7.3 and i was not all that impressed with the low end power but if you kept it screaming it would haul ass. I dont really like that to much. I would rather have a smooth acceleration and sacrifice a little up top to gain a little down bottom. This is what i am hoping for the h1c. even if it limits me a little up top, hopefully it will spool instantaneously.

 

[Rot Box]

I started a similar thread wondering how I could pick up a little more bottom end from my 7.3. http://oilburners.net/forums/showthread.php?t=36067

I had an H1C on my 92 with the factory 21cm exhaust housing. With the 12cm that I swapped on the boost went from taking forever to build boost to almost instant boost. I really liked the way I could build pressure in any RPM at almost any speed.

With all the stock components in place a 21cm H1C will build about 12psi on a stock first gen. With an intake, exhaust and a little more fuel they will clear 24psi no problem. With the 12cm housing I could clear 32psi easily without a load. At that point my drive pressure was probably pretty high, but egt's were never over 1200 at WOT.

I don't know how if this will help any, but that is with a 5.9 feeding it. With a 7.3 I would probably start off with the 21cm housing... even then It would probably build too much boost for stock head bolts.

I would like to see someone try it though. The H1C can has anything from 12-21cm housings available wastegated or non wastegated. There is a lot of tuning that can be had with those options

 

[redneckaggie]

i am starting with an 18 cm and a wastegate set for 12 lbs If that thing seems to be to limiting on the top end then my dad has a cummins with a 21 and i will swap him housings(seems like a pretty good deal huh he gets something to make his motor run better and so do i). I think between the 16 18 and 21 cm housings we can get this thing rolling good.

 

[Rot Box]

I am very interested to hear how this turns out. Keep us posted please

 

[kas83]

i am starting with an 18 cm and a wastegate set for 12 lbs

Is this an external gate set to 12 lbs? 16, 18 and 21 cm housing are non-gated for the H1C/HX35 series of turbos.

 

[redneckaggie]

yes its a 60mm external gate that i ordered and it is supposed to be set for 12 lbs when it came to me.

 

[kas83]

Why such a large gate? And will it progressively bleed drive pressure, or just open at 12 psi boost? If it just opens, I have a feeling you'll lose too much drive pressure and lose boost. I'd go for a 12 cm non-gated housing with that size gate, it'd spool quick and not choke on the topend either.

 

[redneckaggie]

I dont really know why i bought such a large gate i just bought what seemed to best fit my truck all of them were advertised for small gassers so i really didnt know what to buy. Would it be better to swap to a smaller gate, and what size? How would i know the difference between one that constanly bleeds pressure and just opens. It is cheaper to buy the gates than a housing and i can install the gate after the turbo goes on, i will just have to be easy on the right foot to control boost.