Holset H1C exhuast housing size

[THeske]

Could some one help me out on this one please, I'm tring to determine the exhaust housing size on my H1C turbo, 1990 5. 9 engine, the turbo had be rebuilt prior to me purchasing it 4yr's ago, The turbo/exhaust housing is still in the truck but with a trouble light and a mirror I've located and jogged down some casting numbers, Here goes on the front side of the exhaust housing there is a casting stamp # 2 J 8, on the back side the casting stamp reads Holset (with a large raised letter A ), then closer to the exhaust flange the casting stamp #'s are TW1, 5538055 ( I believe this is the identification # 5538055 ) then there is also the # 12-128-01, Like I stated I'm reading this by use of a mirror so there may be a mistake in my # identification but I believe them to be true, Any help or finger pointing to an known Link will be a definite asset,



Thanks fella's

 

[MMeier]

Should be some more numbers on the back side of the exhaust housing, IIRC the 90's had a 21 sq cm housing. Therefore, you would see 21 somewhere back there, or in the case of an 18. 5 sq housing 18 or 18. 5.

 

[THeske]

That's the numbers 21/18 that I was expecting to find on the exhaust housing, No luck, only the numbers stated above

 

[MMeier]

Give it time, I'm sure someone here will chime in.

 

[sdstriper]

Inside the exhaust runners is an indented casting. Usually goes unnoticed until close inspection, removal would be necessary...

 

[dpuckett]

If it is stock, it has an 18. 5. If not, who knows.



Daniel

 

[THeske]

If it is stock, it has an 18. 5. If not, who knows.



Daniel

Ok more info from my end this may not amount to much but the turbo had been rebuilt, before my purchase of the truck! But I would think every thing is still OEM the compressor/exhaust turbine/housings, The tag location on the compressor outlet has a reman identification tag, but those # don't jive either,

How about a physical size difference can the size be determined by measuring the Width/height of the exhaust housing



Some may wonder what the biggy is about this exhaust housing!

I'm looking to upgrade to a 16cm2, but I sure would hate to start an R & R and purchase a 16cm2, only to find that the turbo is 16cm2 equiped

 

[THeske]

Whoops there is a number on reman tag that might help Assembly# 3526739,

Kit# 802302RX, This is a Cummins remanufactured identification tag, I hope this helps U help me,,, Thanks

 

[KBdiesel]

Whoops there is a number on reman tag that might help Assembly# 3526739,

Kit# 802302RX, This is a Cummins remanufactured identification tag, I hope this helps U help me,,, Thanks

The 3526739 indicates it's a 18 cm2. I'll try to find a link for you later, I downloaded the pdf at some point.

 

[THeske]

Thanks guys I found a link that suits my purpose:



TRANSMISSION: AUTO/MANUAL

YEAR: 1990

ENGINE: 160 HP

ORIGINAL PART NO. 3528771

CUMMINS PART NO. 3802302,3802148

HOLSET PART NO. 3526739

C. H. R. A. PART NO. 3523317

FRAME SIZE: H1C

TURBINE HSG. SIZE: 18 cm2



However the exhaust housing may have been changed during this rebuild! without a exh housing casting stamp that Identify's it as a 18cm2, It may still be something else but I will assume it's a 18cm2, I may have one up for sale if it does turn out to be a 16cm2

 

[THeske]

Well I'm back to square one on this one guys, I purchased a modified hx35 turbo with a 16cm2 exhuast non-waste gate, the fella I bought it from said it was a Piers diesel modified turbo, The casting number on the back of the turbo looks like a 16 but the casting number inside the exhaust port looks like 18, anyways this is my delema, the exhaust housing on my truck should be a 18cm2 according to the rebuild tag but it is actually smaller in physical size than the HX35 modified exhaust housing, Can there be a smaller physical size diff and still have more cm2? I did a real rough measurement on both housings the hx35 is about 6" across and 2. 5" wide, my existing turbo is about 6 across and 2" wide, I can't identify the original exhaust housing by the exh port casting # because it is still on the truck and in use,



I don't know i'm from the old school and smaller outside meant smaller inside not bigger, could I be wrong on this one?

 

[Greenleaf]

My 1990 has an "18" cast into the turbine housing and the 1993 has a "18. 5" cast. The 1992 has 21 cast into it!!!

 

[THeske]

My 1990 has an "18" cast into the turbine housing and the 1993 has a "18. 5" cast. The 1992 has 21 cast into it!!!

Greenleaf that doesn't help much, I know what it's supposed to have on as far as the casting stamp goes, But the turbo on the truck the casting stamp cm2 number isn't there, The modified hx35 the casting stamp isn't very clear it could be 16 or 18 but in the port runners the numbers look more like an 18,

 

[BPaulsen]

I find it quite unlikely that you'll have a modified Piers HX35 hybrid turbo with an 18 cm housing. But if you do, there's not much merit to "update" to a 16cm housing. The difference from 21 to 16 is a big step, but from 18 to 16 IMHO not worth worrying about.



On another note . . . the 16cm cost only 150 bucks brand new from Piers. If you buy it, install it, and find out it is IDENTICAL to the one you have, you might be able to sell your "old" 16cm for $120 or so, easily. Investment: $30 bucks. How much value to you put on your sleepless nights worrying about having a too big one?

 

[Greenleaf]

Do you want part numbers. I have part numbers.



The assy number of the turbo will not do any good.

 

[JLEONARD]

 but from 18 to 16 IMHO not worth worrying about.

And I disagree... it lowered my rpm that I started building boost by about 400 making the turck more drivable. I felt it was well worth the effort.

Jay

 

[Greenleaf]

I tried the 16 and swapped the 21 back in. I WANTED the truck to build boost starting at 2000 rpm's.



Saves my transmission/rear tires and I'm not so apt to race folks off the starting line. (stop light) :-laf

 

[THeske]

H1C with small exhaust housing

Do you want part numbers. I have part numbers.



The assy number of the turbo will not do any good.

Ya Link ( LOL ) how about exhaust housing casting stamp numbers, Na not the 12, 14, 16, 18, 18. 5, 21, That would be to easy for me,

I'm beginning to think I have a 12 cm2 non-wastegated housing on my H1C right know even though the assembly # on this rebuilt turbo indicates it should be a 18 cm2, But no casting # for size?

 

[Greenleaf]

I have casting numbers. All but for the 21 which are on the trucks. They would be part numbers. If that helps, and once I dig out of the snow I/ll look at them. The turbos are just lying around here on the floor.

 

[BPaulsen]

Don't think your engine would survive living with a non-wastegated 12cm housing for longer than a few minutes . . . .