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5.3 th400 ebay gt45 build

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Old 01-09-2014, 12:57 PM
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Default 5.3 th400 ebay gt45 build
Yes another

Stock 5.3
Ls9 gead gaskets
Stock 706 heads wuth studs
Ls6 intake stock fuel system
80# inj
Dual 255 pumps
Tu1 cam
Gt45 turbo

Th400 and 3.27 geared

Compressor:
Trim: 69
A/R: .66
Inducer: 68.7
Exducer: 97.8

Turbine:
Trim: 92
A/R: 1.05
Inducer: 87.4
Exducer: 77

Turbine: Outlet = 4" Turbo flange = T4, Downpipe flange = 3.5" V-band

Wanting to run e85 with intercooler and hoping for over 700 ponies

Is this with wishful thinking
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Old 01-09-2014, 01:15 PM
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There are a few versions of the Gt45 out there, which compressor size and specs are you aiming for?
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Old 01-09-2014, 01:16 PM
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Oh no very capable of that hp on high boost. I'm thinking your gonna be around 18psi or more to make that kinda power but very doable . Most of my 5.3's and 5.7's have made 600 easily on 14 pSi and meth.
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Old 01-09-2014, 02:08 PM
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Turbo Specs :Compressor:Trim: 69A/R: .66Inducer: 68.7Exducer: 97.8dumTurbine:Trim: 92A/R: 1.05Inducer: 87.4Exducer: 77

Turbine: Outlet = 4" Turbo flange = T4, Downpipe flange = 3.5" V-band
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Old 01-09-2014, 02:08 PM
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I will also have to make my kit pipe larger for this turbo to work. Since mine is a 3" vband not a 3.5"
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Old 01-09-2014, 02:32 PM
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Just curious where did you buy your gt45 and how much?? kinda thinking about trying one on my fairmont.
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Old 01-09-2014, 03:30 PM
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If im not mistaken Denmah made low 600's in a 4.8L and there was a 240sx with a TH400 that made 700+ using 799 heads anda 4.8...if memory serves me right.

Denmah can give you some real world experience.
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Old 01-09-2014, 04:32 PM
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I will ask em.

My turbo I had from a previous car setup. It was on a older unit.
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Old 01-09-2014, 05:13 PM
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Originally Posted by Twin turbo c5
Just curious where did you buy your gt45 and how much?? kinda thinking about trying one on my fairmont.
im sure you already have seen this, lol http://www.vsracing.net/catalog/prod...2dc9c26a7cbb6a
idk if they seperate the turbo or not though..
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Old 01-09-2014, 05:30 PM
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It still dont say the specs and downpipe sizing
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Old 01-09-2014, 06:24 PM
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On 20lbs it will make over 700rwhp but those 706 heads are ganna kill you I bet
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Old 01-09-2014, 06:29 PM
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Well studded and hope for the best. I will get some head later lol
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Old 01-09-2014, 06:30 PM
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My GT45 showed up today too.. What kind of heads do you recommend? I have a set of factory 241s laying around for the 5.3. Is the compression still to high with them?
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Old 01-09-2014, 06:34 PM
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Originally Posted by Twin turbo c5
Just curious where did you buy your gt45 and how much?? kinda thinking about trying one on my fairmont.
I got mine off ebay, DNA motoring was the seller. Arrived in 2 days and was 245$ to the door.
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Old 01-09-2014, 07:12 PM
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Interesting to see how it does ...I had the same turbo on a foxbody.. I got the turbo from vs racing
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Old 01-09-2014, 07:34 PM
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Dang that's cheap. I'm a big fan of on3 but I reallt want to try one of those on my 07 5.3.
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Old 01-09-2014, 08:45 PM
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Mine is going on an l33. I'd really like to find a build thread on this turbo. It looks bigger than I imagined but I've never had a turbo before so what do I know? :/

Anyone know if battery relocation is necessary or notching the radiator support?
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Old 01-09-2014, 08:46 PM
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Originally Posted by jaywill
Interesting to see how it does ...I had the same turbo on a foxbody.. I got the turbo from vs racing
How did the turbo work for you? I've heard nothing but good things from other people..
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Old 01-09-2014, 08:52 PM
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gt45 is a cheaper version of the BW S475
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Old 01-09-2014, 09:02 PM
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Originally Posted by JustAFooL
How did the turbo work for you? I've heard nothing but good things from other people..
i sold the car b4 i finished it... starting a gt45 build on my malibu now
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