Allison 5sp: Turbo

[Bill H]

I have an 05 CC Duramax currently building a 5 stage PPE tranny, Loooking to upgrade my turbo any one have any suggestions ? Garrett / ATS ? Also installing new intercooler, BD big bor manifolds and new up pipe. When Im done shooting for 700 to 850hp. Also modifing oem fuel pump, addiding electric fuel pump, PPE dual fueler up front shim kit on the fuel rail.

 

[05chevy]

I would worry about rods with all the fuel mods you are talking about. What do you plan to do with the truck? Race,pull,dd or just a toy for the street?

 

[hondarider552]

I have an 05 CC Duramax currently building a 5 stage PPE tranny, Loooking to upgrade my turbo any one have any suggestions ? Garrett / ATS ? Also installing new intercooler, BD big bor manifolds and new up pipe. When Im done shooting for 700 to 850hp. Also modifing oem fuel pump, addiding electric fuel pump, PPE dual fueler up front shim kit on the fuel rail.

Think you need to think about what you want to do with ytour truck instead of what you want.

BD manifold isnt needed. Overprised LML manifold.

 

[lddrew]

750-800hp is not happening without a motor build which is very expensive.

 

[Kspen90]

Head studs need to be done in conjunction with a new turbo. Someone correct me if im wrong but iirc lly head gaskets and bolts will only hold 30psi before blowing out.

 

[JMK777]

if you want 700-850 I would go with a s475 or 480, I'm using the 480 in my build.

 

[JoshH]

Head studs need to be done in conjunction with a new turbo. Someone correct me if im wrong but iirc lly head gaskets and bolts will only hold 30psi before blowing out.

Nope, that's not true. It's really hit or miss. Some blow with stock programming and stock turbo while some hold 50+ psi of boost and over 600 HP with stock head bolts.

 

[hondarider552]

X2..

 

[Chevy1925]

Head studs need to be done in conjunction with a new turbo. Someone correct me if im wrong but iirc lly head gaskets and bolts will only hold 30psi before blowing out.

Lol wow yeah thats way way off. If it were that way i would have blowin headgaskets before bendin my rods

 

[Kspen90]

I specified LLY headgaskets, is this true with the LLY? I know the lb7 will hold more than 30psi in most situations.

 

[MadMaxx61]

I specified LLY headgaskets, is this true with the LLY? I know the lb7 will hold more than 30psi in most situations.

Hit and miss on all years.

PS. I have had mine 36-42psi lots and still good.

 

[jraymer]

Head studs need to be done in conjunction with a new turbo. Someone correct me if im wrong but iirc lly head gaskets and bolts will only hold 30psi before blowing out.

:umno:

 

[TeaBagger2006]

damn it kspent! always getting yelled at!

 

[LWATSON]

I would skip on everything and just do a trans, tuning, liftpump and a good turbo. It will save you allot of money and your still going to have to detune to keep your rods from bending.

 

[Chevy1925]

I specified LLY headgaskets, is this true with the LLY? I know the lb7 will hold more than 30psi in most situations.

they are the same as LB7

 

[Bill H]

Thats what I have been told, Planning on new rods and pistons in the sprirg.

 

[dmax711]

my lly has seen over 40psi with stock motor and a s464 and i beat the snot outa it...

 

[Bill H]

do you know of any one that does dyn tuning on the east coast for duramax? I'm in SW VA so NC is just a hop an a skip.

 

[Bill H]

Street Toy, daily.

 

[dmax711]

not really, ur best bet is a truck show or event, i dyno'ed mine in pa at a truck show. and like a buncha guys said def have to do rods with what you want to do. i have a s464 and kit by trent with efi and turned all the way up its always in the back of my mind. thats why im in the process of a build...