Engine/Transmission (1998.5 - 2002) Hx-55

[DieselRam30]

My question is for the guys running the HX-55 either as a single or in twins or those with experience or knowledge of this turbo.



How does the HX-55 spool in comparison to a modified HX-40 (like someone could get from Piers, etc. ), a standard B-1 (say B-1-2 version), a larger HTB2, etc. ?



And how do these things work in twins setups? I know a bunch of guys are running JR's HX-55 and HT4C; are there any other combos that work well?



Thanks in advance for the responses.

 

[RBratby]

when i talked to j. r adkins he told me his standard hx55 (be on the truck soon) spooled like an hx40 with an 18 housing. the standard 55 is a little bigger then the lil 55.

 

[Diesel Freak]

are you talking spool once the turbo is lit, or the lower boost threshold?



There is a huge difference between the two.



My HX40 lights at 1500, makes 20 psi @ 1600 and is at 30 psi at any RPM after that... with just M4's and an EZ. The fueling box bumps peak boost to 38 PSI.



The larger the rotating assy and geometry of the turbo, the higher the boost threshold.



EDIT: My turbo is a PDR40 with a boost controller.

 

[Jetpilot]

All HX50's and 55's are laggy compared to an HX40. Normally you will see increased egt's at cruising speeds due to lack of airflow from such a large charger. A good example would be egt's around 900* when going 70 MPH on level ground..... The 50 and 55's shine on the topend when the go pedal is pushed and they are "up on" boost they provide good cooling and HP!



Doug

 

[J.R. Adkins]

The 55 starts to light off around 2300 in my truck and really starts wheeling around 2500. Between 2200 and 2600 there is a 140hp and 200 ft lbs increase on my dyno sheets.

Will there is something VERY wrong with your setup. Most people with same model as you are seeing the turbo take off around 1600 to 1700. Give me A call so I can help.





J. R.

 

[Joseph Donnelly]

Almost 5 years ago I put an HX55 on my 1997 to make 600+ hp at the wheels. It was the slowest spooling turbo I have used to date. Even Pius Eberle's monster MSB spooled significantly faster. I ran the smallest housing then available, 19 cm2. Even as sorry as its driveability was, I blew up 3 of them, sending the exhaust wheel to the muffler while shredding the downpipe, and in one case grenaded the compressor wheel too.

On my 2004 I have run a 40 sized sleeve bearing Jammer, the Pius WSB, and now the Edge/DD ball bearing Jammer. The Edge BB might be a little less for top end power (haven't tried it yet on the dyno), but the 55 only gave 43 lb boost at 609 hp and took an act of congress to spool up. The BB does survive with heavy applications of fuel/power and spools up nicely.



Overall, I rate the 55 a specialty turbo for a dyno queen truck, and one where the owner is willing to stockpile a couple spares so he can get home again.

 

[Forrest]

I have a lil 55 on my truck...

The 55 starts to light off around 2300 in my truck and really starts wheeling around 2500.

-Will

That was pretty close to the HX55-16 I had. Mine lit off about 2100 to 2200. That was with a low end fueling profile & EDM 3+'s.



I had a Hwy Patrolman shake his finger at me. He was a few cars back when I accelerated going up a hill below 2100. Guess he didn't like the all engulfing black cloud. :-laf

 

[TravisG]

"Overall, I rate the 55 a specialty turbo for a dyno queen truck, and one where the owner is willing to stockpile a couple spares so he can get home again. "



Joe-While I don't doubt anything that you say, I have to disagree w/ you about the 55 being a specialty turbo. J. R. 's 55 is on a truck in Illinois that has won several truck pulls in Illinois, ran a 12. 6 in the 1/4 mile and is making a little under 600 h. p. w/ a single and diesel only. This truck is also driven daily, pulls corn wagons through fields at night and also pulls snowmobiles all the way to Wisconsin during the winter.



While this turbo does not lite instantly, she gets up and goes pretty quick and is one heck of a ride.



If it is setup right and you are not looking for twin like spooling, I think the 55 is a great turbo.

 

[Diesel Freak]

What is the difference in rotational inertia between a HX55 and a HX40.



my gues is that it is substantial!!!

 

[Mhannink]

since we are on the subject of big turbos anyone running a 40/60 twin of any kind and how do u like it im looking to do this when i get a dodge and want to know what u think also other good combos im looking to make 1500 hp if possible or basicaly as much as is possible to make out of 360 cid

 

[Diesel Freak]

yer gonna need at least a T106 on the bottom to move enough air

 

[Jim Fulmer]

yer gonna need at least a T106 on the bottom to move enough air

And something allot different than a 40 on top, I found the end of a 40 and it's ability to move enough air... ... ... ... and no it didn't blow, actually it's in good shape.



Jim

 

[Mhannink]

whats a t106 and i want to use a 40 so its will spool to much bigger and it wont spool

 

[Diesel Freak]

A T106 is a big friggin turbo capable of close to 2500 HP in a Gasser, so basicly 1800 HP in a diesel.



A HX40 would be a the cork (way to friggin small) in the system if you wanted to make some major power.

 

[dlange]

I have to agree with Travis. That 55 is on my truck. I would say the truck is definately a TDR do-it-all truck. Very competitive sledpulling, daily driver, ( late 2001 with 110,000 miles), mid 12v's at 110 in the quarter. And used all week on our dairy farm. It must spool better that the one u had b/c I have been caught pulling a 25 foot gooseneck in the missouri hills. Nothing but positive results so far. And once that charger hits 10 lbs, I would be willing to say most people will be looking at my tail lights. I dont get into the "his is better than theirs" deal, but I have to give JR BIG credit where credit is due. This is one great charger.

 

[Diesel Freak]

they have hills in missouri?

 

[Mhannink]

ok t106 fist how does it make more power in a gasser then a diesel secong what would be a good bottom tubro for something like this remember i want to be able to spool rather quick could i use a blower of some sorts to get the other go going

 

[TravisG]

Here is a post in another thread I found about 55's. And it is from another guy named Travis so you know its gotta be true. :-laf



QUOTE=TReed]I hope you like some lag, I have JR'S Lil 55 and it's kinda laggy about 1600-1700 before it starts to spool, but it is a real good sled pulling turbo. (IMO) Turbo seems to be tough as nails, I put it through some abuse.



they have hills in missouri?

Yep at yo mammas house. J/k Diesel Freak couldn't resist.

 

[Chrisw]

And once that charger hits 10 lbs, I would be willing to say most people will be looking at my tail lights.

Your truck has tail lights... ... So that is what is on the other side of all that smoke



hay dave the box is in my gray Honda Civic in the back seat when you come to pick it up tonight

 

[Diesel Freak]

ok t106 fist how does it make more power in a gasser then a diesel secong what would be a good bottom tubro for something like this remember i want to be able to spool rather quick could i use a blower of some sorts to get the other go going

It's called Excess Air. Diesels run much leaner than a gasser.



If you want over 1000 HP, it wont be streetable, but a blower would help.



Lastly, please use better grammer and spelling, it adds credibility to your questions.