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post #1 of 69 (permalink) Old 07-22-2008, 02:09 AM Thread Starter
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Turbo Efficiency??

Need some advice with my turbo.

I used this turbo to fabricate the T4 setup. It performs better than stock on top end and leaves a little to be desired on bottom. The truck actually runs good on top now. EGT's are good.

My question is that I can make 10psi max at 1500rpm. At 3500 wot I only get 26-27psi boost with 38-40psi backpressure. Is this comporable to an H2E, keep in mind I am running stock sticks and an edge.

I am seeing smoke at 26-27psi. I would think that a turbo this large should clean up. I don't know if there are tighter ex housings available and I think it may be time to invest in a good turbo. Anyone with comparison numbers from an H2E or anything else might help. If this is normal then good, but I feel like there should be a more efficient turbo out there. It has never even thought about surging though.


SPECS:

Nomenclature (tag ID) T4 GT45 Y2004K
Inlet (exducer/hot side) T-4 Flange 70.1mm x 82.55mm (2.76” x3.25”)
Outlet (exducer/hot side) 4.25” V-Band
Inlet (compressor/cold side) Ø 109mm (4.25”)
Outlet (compressor/cold side) Ø 86mm (3.38”)
Exducer A/R 1.05
Compressor A/R 0.66
Bearing Type Ball Bearing
Cooling/Lubrication Oil/Oil
Oil Supply Fitting Flange
Oil Return Fitting Flange
Compressor major diameter Ø 98 mm

2008 F-250 SCLB Larait.


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post #2 of 69 (permalink) Old 07-22-2008, 02:14 AM Thread Starter
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Re: Turbo Efficiency??

Here is a visual of it.

2008 F-250 SCLB Larait.


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Last edited by moore20017.3; 11-22-2009 at 08:27 PM.
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post #3 of 69 (permalink) Old 07-22-2008, 02:28 AM Thread Starter
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Re: Turbo Efficiency??

Maybe I am not being clear, sorry.

Is it possible to get to 1:1 delta with any single turbo setup? That would put me at 35psi boost and drive pressure or am I dreaming.

2008 F-250 SCLB Larait.


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post #4 of 69 (permalink) Old 07-22-2008, 02:37 AM
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Re: Turbo Efficiency??

My modded H2E is operating at 1:1 per AE and Jody's laptop when he live tuned my truck in Feb.

Early99 CC LWB 4X4
Updated B codes, Modded H2E, Big oil, half filled block, studded, John Wood 4R100. 232K miles
Tows like a champ!

"Damn Larry, he passed us like a freight train passing a hobo!"
--Lisa P.

Just sold to Larry
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2-17-2019: 97 CC LWB 4X4 7.3 with full banks kit, John Wood E4OD. 139K miles
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post #5 of 69 (permalink) Old 07-22-2008, 02:42 AM Thread Starter
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Re: Turbo Efficiency??

Thats what I wanted to hear, mine is good for now but when I change the motor and sticks it'll get pushed out of its map pretty quick. I'll be looking for other single turbo options.

Thanks

2008 F-250 SCLB Larait.


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post #6 of 69 (permalink) Old 07-22-2008, 02:50 AM
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Re: Turbo Efficiency??

What charger is it? I see GT45, but your wheel measurements are too large for a 45 right?

Anyway, for a single on a 7.3 a GT42 is hard to beat.

The Sledgehammer is a hard hitting sob too.
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post #7 of 69 (permalink) Old 07-22-2008, 02:56 AM Thread Starter
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Re: Turbo Efficiency??

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Originally Posted by Charles View Post
What charger is it? I see GT45, but your wheel measurements are too large for a 45 right?

Anyway, for a single on a 7.3 a GT42 is hard to beat.

The Sledgehammer is a hard hitting sob too.
Its a Super T70 hybrid. Should be close to a GT42, it is a GT45 frame but the inducer is only 70.1MM

Do you think the pressure differential will improve as I fuel it more, I was assuming that it would get worse with more fuel and rpm's.

Who makes the sledge? I want to look at it.

2008 F-250 SCLB Larait.


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post #8 of 69 (permalink) Old 07-22-2008, 03:09 AM
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Re: Turbo Efficiency??

Call and talk to Dave at Swamps about the sledghammer.

You say it is a GT45 Frame, but it's a T something? Who makes it? GT45 is a garret model and T is a Turbonetics line.




Oh, and it will almost certainly worsen with additional fuel. Sounds like a flaming pile of sh*t whoever makes it. It may actually be defective in some way. No way a charger that large should be running that much drive with a 1.0+ A/R turbine housing on stock injectors.
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post #9 of 69 (permalink) Old 07-22-2008, 03:11 AM
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Re: Turbo Efficiency??

Looks like a ebay turbo.

'95 PSD 3" RSK, 3" bodylift, 37x13.50x20 xterrains. Tymar intake,ARP studs, comp 910s, DIY 238 hybrids with 200% nozzles, 6.0 intercooler, 3.5" downpipe to dual 4" stacks, CCV mod, IDM mod, DP tuner mod stock, 40t, 80e, 140r, fass 150/180, ITP regulated return, TE big oil, GTP38r turbo, lookin for 500 ponies
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post #10 of 69 (permalink) Old 07-22-2008, 03:15 AM Thread Starter
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Re: Turbo Efficiency??

Quote:
Originally Posted by Charles View Post
Call and talk to Dave at Swamps about the sledghammer.

You say it is a GT45 Frame, but it's a T something? Who makes it? GT45 is a garret model and T is a Turbonetics line.




Oh, and it will almost certainly worsen with additional fuel. Sounds like a flaming pile of sh*t whoever makes it. It may actually be defective in some way. No way a charger that large should be running that much drive with a 1.0+ A/R turbine housing on stock injectors.
T is referring to T flange. This is the turbine inlet. OBS for example used a divided T-4 (from the factory) with the four bolts instead of the v-band on the 99-03. T flanges come in several sizes and divided and open configuration. the next step up is a T-6 flange.

2008 F-250 SCLB Larait.


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