turbine housing sizes.

[Don M]

While fartin around in the garage today I decided to take quick photo or two of the difference of the HX35 and the HX40 housings.



Its a laugh to think about making big HP or even having liveable EGT's with the tiny little 35 housing. The opening in the HX35 is only 2. 5 inches in width. The B has a displacement of 360 cubic inches and trying to squeeze all 6 cylinders of that hot exhaust gas out of that little opening is not easy.



Don~

 

[Don M]

adding one more

one more

 

[HEMI®Dart]

I hate my Hx-35. I never want to put it back on. Even with my Valet switch on the HX-40 spools nice.



Don,



Where is your #0 plate? In the stock position?



See here: http://216.235.147.117/forums/showthread.php?s=&threadid=40238

 

[Joseph Donnelly]

My airflow article should appear in the August TDR issue. Check out the almost 5" diameter outlet of the HX55 in the article. I like that turbo, get 50 psi boost out of it with just a bit of accelerator pedal. It's not a lag pig if you are old enough and your Ram has big enough b@##$ to put the fuel to it

 

[Don M]

Originally posted by HEMI®Dart

I hate my Hx-35. I never want to put it back on. Even with my Valet switch on the HX-40 spools nice.



Don,



Where is your #0 plate? In the stock position?



See here: http://216.235.147.117/forums/showthread.php?s=&threadid=40238

Bill,



My zero stays about 20 thou back from stock most of the time.

It was 95 degrees here today and the smoke gets a little bit worse with the higher temps. I guess I mash the pedal down a little further as the temps increase outdoors. (- ;





Even twin turbo guys with the HX35 primary turbo are still having to push the exhaust out of the little tiny 2. 5 inch opening. Add in the extra air they are packing in at 85 psi into the cylinders and the problem only gets worse.

This is akin to running a single 2. 5 inch exhaust pipe out of the back of a small block powered camaro or something alike and piping both banks of cylinders into the same single pipe. Try to get the local hot-rodders to use a single 2. 5 inch pipe and make 500 plus HP.

If they wont do it, why the heck should we be any different?

Oh yeah, add a restriction in the outlet called a turbine wheel and things just get worse. The cylinders cant be scavenged worth a dern with that bottle neck of a restriction. Joes big turbo addresses the above issues very well.



edit- spinning high rpm just makes the scenerio worse by pumping even more air through the tiny opening. The exhaust gas is coming out of the opening at a tremendous force and the work to create that force has a price of engine efficiency and HP.







Don~

 

[Sled Puller]

Joe, can't wait for that article!



Always interesting to see what you are selling!





Don,

You just got this all figured out, eh? I may be going to a 40 sooner than later, I need more air with Piers race torque plate in there.

 

[Don M]

I have a feeling you will be going to a larger primary after you make your first dyno pull and see the results of what you have effectively done by exhausting your engine through a soda straw.



Don~

 

[HiPerf360]

Ok Don, I get the point... I'll get a turbo... .

 

[Don M]

Originally posted by HiPerf360

Ok Don, I get the point... I'll get a turbo... .

thats funny Jon Image where you could go without the soda straw



Maybe a single hybrid H2 or a special HX40 with a censored treatment done to it.



Oh, this is not to belittle anyone... . I went down the road of the little exhaust housings when I got the quickspool HX40 and the tiny little 12 housing from a HX35. All I found was a bunch of EGT, choked power, and the thing blew up 3 weeks after bolting it on from overspeeding.



Don~

 

[TxDieselKid]

Don,

Don't know much about it but this sounds like a good turbo for the guys around the 250-300hp range, tell me what you think. It is taken from this thread

One is from a John Deere 466 engine, which is a direct bolt on (whoo hoo!!) and the other is from a John Deere 8. 1 Liter engine. The 466 turbo inlet is larger than the hx35, and the exhaust opening is the same size as it's turbine, which is only slightly larger than that of the hx35.

The possibiltys are endless man.



Andrew-turbo wars, the other reason i'm waiting to BOMB

 

[Sled Puller]

Originally posted by Don M

I have a feeling you will be going to a larger primary after you make your first dyno pull and see the results of what you have effectively done by exhausting your engine through a soda straw.



Don~

Who says I haven't??

 

[Don M]

Unless you lied to me on the phone last week then you still have a HX35 primary. Gene, this thread was never directed toward you anyway. I just laugh when I remember I was trying to use a hx35 housing on a 12 valve to make big HP. It aint gonna happen.



The turbine housing size can be a 12 to a 21, but it all has to be squeezed through that little opening at some time. Oh, and pass through and by that turbine wheel.

Consider that last statement carefully when chosing where to go next.



Andrew,

I dont know much about turbos and how to properly build a twin system. I only know how to look at things and see the reasons why they wont work or what could be a potential problem.



Don~

 

[HoleshotHolset]

I'm thinking that an HX-55 would be nice right about now... .



Matt

 

[DBR]

Don, looks can be deceiving, break out the old measuring stick and you'll find that there isn't too much difference between the 35 and 40 drive wheel. I can't remember off the top of my head what the actual difference is, but when I bored out a 16cm hx35 exhaust housing and stuffed in the compressor side of a hx40, there wasn't all that much difference in comparison to the stock 16cm hx 40. Spool up still had lag…. There defiantly is a place for the hx35 as a primary on a twin set-up, such as towing. I do agree that when going for high horse power / RPM the hx 35 does have limits, what should be used instead is out of my area of experience for now. I have been gathering up turbo's for a new system to see first hand how they work. I'm pretty sure what I'm putting together isn't anything excitingly new, just something a little different that I wanted to play with.

 

[Sled Puller]

Originally posted by Don M

Unless you lied to me on the phone last week then you still have a HX35 primary. Gene, this thread was never directed toward you anyway. I just laugh when I remember I was trying to use a hx35 housing on a 12 valve to make big HP. It aint gonna happen.

Don~

That is not what I meant Don, and I did not think this thread was directed at me directly, but it is indirectly directed at me. Did that make sense?



I knew going into the twins about the 35 limitations, but cost and a huge concern over streetability was an issue. The 35 even with a huge housing on it is just plain WICKED on the street, and egts are not a problem until well over 3000rpm.

Something most people don't need anyway. An excellent towing setup, as I could not get it hot hauling.



This setup is TOO steetable-- I need to go with something bigger for the track. I expected some lag with the cam and big housing, but I got NO lag.

I definately have room to go with a HX-40--or bigger.



Oh-what do you consider big numbers?

 

[Jim Fulmer]

Alright you guys are killing me with the talk about twins, I too have thought about this set-up as it looks like I will get a Piers 40 to go with some injectors and DV's (depends on what he says) then had hoped on looking at working on the twins Idea say this fall or winter (money issue) just think it would be nice to have some clean HP and not have to wonder were the EGT's are at when the guage is pegged I talked to Mitchell and they only sell there kit with a pusher turbo and not just the hardware. Anyone that is a hobbist (not taking away from the venders) have the tubing size and a diagram to plumb everything?



Jim

 

[DBR]

Jfulmer, I will be putting my twins back on in the near future, I'll take some pics of the install for you. Heck if you like I'll shoot some pics of the stuff while it is sitting on the shelf, that should work out better. E-mail me at my home address. If you're not going to be installing the twins till later this year, I'll be more than happy to give some of my present hardware later. I'm planning on cleaning up the install with some new piping and such this summer.

 

[Don M]

DBR,



Your right about the turbine wheel being part of the problem and the 35 and 40 have almost the same size wheel. The 40 has a 70mm wheel and I cant remember the size of the 35 wheel right now. Guess I could measure mine.

Looking down into the hole of either housing we can see the difference of the wheel size is not that great.

We agree on everything you have said. I wrote this to Gene earlier in the thread:



"Oh, and pass through and by that turbine wheel.

Consider that last statement carefully when chosing where to go next. "



Don~



edit- I measured the HX35 wheel to be about 70mm (2. 735 inches)on the big and 58mm (2. 32 inches)on the small portion the gas has to ultimately escape through. Tiny, tiny!

 

[HEMI®Dart]

I may need more turbo

I was on the highway crusing at 65. Gently pushed the Accellerator pedal only 1/6th of the way down. 12 lbs boost, EGT is 1000 degrees already.



Maybe Joe D's HX-55 will be the way to go. I was "old " enough for the #0 plate.



The #0 Plate is insane.



The truck is starting to scare ME

 

[Forrest]

Hemi - It is too.



Obscene is also descriptive for it. Got to love the response ... like no other plate. Oo.



Scary is right ... the rear tires don't stick as well anymore, you got to be careful on curves & I'm wondering about breaking something.



Towing requires more rt foot control.