HOLSET HX-55 too big or too little?

jjrightmire1973 · 11-20-2008, 12:46 AM

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

jjrightmire1973 · 11-20-2008, 12:49 AM

and I have 90 HP DDP injectors

SPEAKSUP · 11-20-2008, 12:56 AM

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.

**Neel** · 11-20-2008, 01:15 AM

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

SPEAKSUP · 11-20-2008, 01:23 AM

Quote:

Originally Posted by Neel

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.

BIGrusty250 · 11-20-2008, 01:34 AM

i would say bigger injectors thjough. fuel fuel fuel

BIGrusty250 · 11-20-2008, 01:36 AM

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

HOTMOPR · 11-20-2008, 01:40 AM

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..

SPEAKSUP · 11-20-2008, 01:42 AM

Quote:

Originally Posted by HOTMOPR

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.

HOTMOPR · 11-20-2008, 01:43 AM

Quote:

Originally Posted by BIGrusty250

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

**Neel** · 11-20-2008, 01:45 AM

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

jjrightmire1973 · 11-20-2008, 08:51 PM

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?