HOLSET HX-55 too big or too little? - Dodge Cummins Diesel Forum
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post #1 of 21 (permalink) Old 11-20-2008, 12:46 AM Thread Starter
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HOLSET HX-55 too big or too little?

I am looking to upgrade the turbo in my 2003 HO 5.9 6 speed, the mods are diablo sport programmer and power puck chip, 5" turbo back exhaust, s & B intake, airdog 150, AFE intake horn, and arson 2 kit and dual feed line kit. My exhaust temps are getting kinds high whould this turbo be to little or too much for this? I would also be getting arp head studs and an aftermarked exhaust manifold. Thanks


2003 H.O 543 HP and 1273 torque before Stage 3 pump and beta 4.2
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post #2 of 21 (permalink) Old 11-20-2008, 12:49 AM Thread Starter
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and I have 90 HP DDP injectors

2003 H.O 543 HP and 1273 torque before Stage 3 pump and beta 4.2
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post #3 of 21 (permalink) Old 11-20-2008, 12:56 AM
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Well Im kinda interested a little also Im going to say your going to need bigger injectors I havent heard of anyone running it on a CR I say go for it anyways.

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post #4 of 21 (permalink) Old 11-20-2008, 01:15 AM
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its a bit big i think there around a 70mm wheel, you would have to fuel that thing pretty hard and it still wouldnt be that streetable

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post #5 of 21 (permalink) Old 11-20-2008, 01:23 AM
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its a bit big i think there around a 70mm wheel, you would have to fuel that thing pretty hard and it still wouldnt be that streetable
Plenty of people use 71 wheels and a couple run even bigger and it's still streetable It's all a matter of the driver.

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post #6 of 21 (permalink) Old 11-20-2008, 01:34 AM
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i would say bigger injectors thjough. fuel fuel fuel

92 350 2wd 5spd, 230 pump, 100 horse injectors currently, 16 inch electrical fan, hx50 and 6 inch stack setting on the bench, time to save save save for a clutch!!!!
W.I.P. = currently have a 6.9 powered 76 f250 highboy... pondering on a 5.9 swap
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post #7 of 21 (permalink) Old 11-20-2008, 01:36 AM
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Also watch the size exhaust housing you are using, going that big it wont be hard to have lag. I am in the same boat right now, i have an HX 50 i am putting on mine, but it has a 23cm housing on it. Right now i am talking to a guy that sells used turbos, and he is looking for a 15cm housing for me. Smaller exhaust housing = less lag/ quicker boost

92 350 2wd 5spd, 230 pump, 100 horse injectors currently, 16 inch electrical fan, hx50 and 6 inch stack setting on the bench, time to save save save for a clutch!!!!
W.I.P. = currently have a 6.9 powered 76 f250 highboy... pondering on a 5.9 swap
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post #8 of 21 (permalink) Old 11-20-2008, 01:40 AM
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most of idustrial injections new turbos have a 71 mm turbine. I am fairly sure that the hx 55 is a 65/71 The hard part may be finding a turbine housing small enough to run on the street. I think somebody was modifying hx 40 housings to fit the 50 and 55. Not sure on that though..

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post #9 of 21 (permalink) Old 11-20-2008, 01:42 AM
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most of idustrial injections new turbos have a 71 mm turbine. I am fairly sure that the hx 55 is a 65/71 The hard part may be finding a turbine housing small enough to run on the street. I think somebody was modifying hx 40 housings to fit the 50 and 55. Not sure on that though..
Couple of people running 71 /71 and they are having no problems making them streetable in fact i think thats what the A5K and Phat Shaft 71 is.

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post #10 of 21 (permalink) Old 11-20-2008, 01:43 AM
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Originally Posted by BIGrusty250 View Post
Also watch the size exhaust housing you are using, going that big it wont be hard to have lag. I am in the same boat right now, i have an HX 50 i am putting on mine, but it has a 23cm housing on it. Right now i am talking to a guy that sells used turbos, and he is looking for a 15cm housing for me. Smaller exhaust housing = less lag/ quicker boost
See if he can find a small one for my GT42. like a .90 A/R for the 73mm turbine..:thumbsup

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post #11 of 21 (permalink) Old 11-20-2008, 01:45 AM
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regardless its gonna be laggy, i would try to find another budget turbo, and a lot of the holset stuff is very surgy when you throw pressure at it

2012 3500 Megacab Laramie
2008 F350 CCSB Lariat
16'' OneUpOffroad lift 40/15.50/22's
2006 3500 QCLB Laramie ( sold! )
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TURBO ENGINEERING CORP. 617hp, stock cp3,stock lift pump, and on 41's
1992 D250 SCLB LE
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post #12 of 21 (permalink) Old 11-20-2008, 08:51 PM Thread Starter
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what about using it as the big turbo in a twin setup? is there a twin turbo kit that has every thing except the turbos? or has anyone made one?

2003 H.O 543 HP and 1273 torque before Stage 3 pump and beta 4.2
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