LB7: New turbo

motoking_1990

motoking_1990

Active member
May 9, 2011
1,957
5
38
Terre Haute, IN
I know its a while away but this up coming July I'm will be purchasing a new turbo setup. And head studs. Looking to break 600 this year. Anyone got any ideas on a good big single? I want to get rid of the journal bearings for sure. Been looking at fleeces s475. Read the forum about the t3 vs t4. Would the t3 help with spool up? I was thinking about New manifolds and up pipes too. Then maybe get brayden to make me some new tunes. Any advice?

Sent from my C811 4G using Tapatalk
 
Magnus

Magnus

New member
Jun 22, 2013
144
0
0
I don't think there is a T3 s400 turbine housing, and looking to get rid of the journal bearings with an S400 :confused:

You should give more info about what you use the truck for if you want the best possible advice. Since you're going big single Ill assume you don't tow heavy and give you what I was eyeballing.

For cheap(ish) an S467.7 FMW with a .90 A/R turbine is a solid match for a 6.6L from about 2000-4000RPM. You could maybe still tow, spool pretty quickly, and peak over 600 with easily manageable EGTs for about $1400. It looks like Fleece endorses the 467.7 with larger turbine wheel for $1800.

For the big pimpin solution I was pretty enamored with the Garrett GTX 4294 seems to outflow the 467 and built on the legendary GT42 ball bearing cartridge. Not many people have run this on a dmax from what I can find but the results should be the same as above plus ball bearings and water cooling.

I don't have any hard data to backup this next point, but my engineering gut has me convinced to do a cam swap on my own truck before up pipes or headers with a big single. I have no experimental data and probably shouldn't even suggest it, but I think a more aggressive exhaust opening on the cam would have a bigger impact on turbo spool up. Also the weird dmax factory firing order seems to be the engines only real design flaw, so I'd make it an alternate firing order cam and solve that issue too.
 
Magnus

Magnus

New member
Jun 22, 2013
144
0
0
Keep in mind I haven't done any of that yet... But the math says it's a good idea lol
 
motoking_1990

motoking_1990

Active member
May 9, 2011
1,957
5
38
Terre Haute, IN
That just goes to show how much I know about turbos. I am wanting a big single and doesnt take forever to spool. The reason for stepping away from journal is because I have went through two stock ihi's now.

Sent from my C811 4G using Tapatalk
 
DIESELMAFIAPER.LB7

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
motoking_1990 said:
That just goes to show how much I know about turbos. I am wanting a big single and doesnt take forever to spool. The reason for stepping away from journal is because I have went through two stock ihi's now.

Sent from my C811 4G using Tapatalk
Click to expand...

the journal bearing has nothing to do with that issue... I have had s364 and s366 and have around 60k miles between those two setups still working fine both journal bearing the 64 is on another triple turbod truck and still going. Also my 66 lights very quickly but I have little more fuel.

go with a billet t4 366 they spool great or the fmw 64.5 like already said they are a great turbo for the truck unless you got lots of money to piss away on a garret model then go for a gtx 4088 or gtx4294
 
Magnus

Magnus

New member
Jun 22, 2013
144
0
0
A 66mm inducer and up on any well designed turbo will flow enough air to give you some custom shortened connecting rods before you have EGT issues.

A T4 366 is probably the best bang for your buck.

GTX 4088 came out at SEMA. Now a ~65mm inducer and claimed compressor map outflows a 4094R at the top end.
 
motoking_1990

motoking_1990

Active member
May 9, 2011
1,957
5
38
Terre Haute, IN
What is the difference between t3 and T4? And would I need different ic pipes? A different ic will probably go in too

Sent from my C811 4G using Tapatalk
 
Magnus

Magnus

New member
Jun 22, 2013
144
0
0
Different turbine inlet flange. Just means you get a different exhaust housing and pedestal if you get an S300 frame, but an S400 frame or GT40 and up should be only T4 at the smallest. Upgrading a turbo isn't much of an upgrade if you're still pushing exhaust through a T3 housing IMO.

And your IHI failures sound like they were over stressed structurally, not necessarily due to journal bearings. An S366 or S400 series will still be journal, but it's a far superior design in every way except for being pure oil cooling.
 
motoking_1990

motoking_1990

Active member
May 9, 2011
1,957
5
38
Terre Haute, IN
So t4 is bigger than t3. Thus allowing more air to get to the turbine wheel? What size is stock? What would be the effect if I had a t5 (if there is a thing) on a small housing? Would that cause it to spin too fast? Would it light faster? Sorry I just have to many questions. I'm just trying to grasp as much information as I can to know what I want. I did a little research on drive pressure and do understand the pressure coming out of the exhaust needs to match pretty close to the air going in. (Boost) How does all this fall together?

Sent from my C811 4G using Tapatalk
 
motoking_1990

motoking_1990

Active member
May 9, 2011
1,957
5
38
Terre Haute, IN
It has different injectors. You can tell someone put them in. I just dont have it in my Sig cause I'm not sure if they are bigger or not. I'm the third owner of my truck. Buddy I bought it off of only had it a week before I got him to come off it. He bought it from a guy in Illinois. Had efi and intake when I bought it, and what looks like injectors. I was looking at the 475 from fleece and have heard a lot of good about it. what I'm worried about with it is, will it lite very quick?

Sent from my C811 4G using Tapatalk
 
You must log in or register to reply here.
Top Bottom