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twin turbo stock 305

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Old Feb 14, 2006 | 09:35 PM
  #1  
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
twin turbo stock 305

hi, i am purchasing a twin turbo intercooler header set for my all stock 305 TPI and i am just wondering if this is safe for my lower motor. please let me know if this is a mistake and if my crank will send pistons through my heads. will it be fast?
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Old Feb 14, 2006 | 09:37 PM
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From: Amarillo TX
Car: 89 Formula
Engine: 5.7 TPI
Transmission: 700R4
not a mistake if you keep the boost low with a reasonable tune
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Old Feb 14, 2006 | 09:37 PM
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From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
For some reason I have a feeling this will be a very fast car. I will meet your crank in saudi arabia when it gets there.
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Old Feb 14, 2006 | 09:38 PM
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
thanks guys, will it beat SRT-4's
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Old Feb 14, 2006 | 09:44 PM
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From: chicago
Car: 89 ws6 formula 5spd
Engine: 355 4bolt mains afr195's stealth ram
Transmission: t-5
Axle/Gears: 3.08 open diff lol
twin 305

if you can keep the tranny together and hook you will scare a lot of people. including ureself
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Old Feb 14, 2006 | 09:46 PM
  #6  
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
o yeah?
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Old Feb 14, 2006 | 09:53 PM
  #7  
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Fast? "Fast" is a relative term.

As for your idea, this is the result:



Smitty's 305 Turbo IROC
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Old Feb 14, 2006 | 09:56 PM
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From: Waldorf, MD
Car: 91 Formula, 89 IROC
Engine: LB9, LB9
Transmission: 700R4, 700R4
Axle/Gears: Posi 2.73, Posi 2.73
Is that a single turbo sir?
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Old Feb 14, 2006 | 09:58 PM
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
WoW thats a fast car, will mine be this fast with twin turbo and intercooler?and maybe tpis top end?like intake and stuff?
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Old Feb 14, 2006 | 10:08 PM
  #10  
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
what if i put a shift kit in will it hold the 12's and a small cam?
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Old Feb 14, 2006 | 10:18 PM
  #11  
wheelstandin87's Avatar
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
need more info on the stock tpi with twin turbo?please
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Old Feb 14, 2006 | 11:52 PM
  #12  
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From: Hamilton
Car: 1990 IROCZ Camaro
Engine: 350 4bbl, 200cc Heads, 270hr Cam
Transmission: 700R4 w/ Trans-Go shift kit.
Axle/Gears: GM 10 bolt Posi
Honestly, I think your main concern with a TT setup is strengthening your motor and drivetrain up, because it's going to be handling alot of stress...and lets face it, you won't be babying it anytime soon



As for beating SRT4's...you do the math.

4cyl + 1turbo vs. 8cyl + 2turbo.

You are doubling him in both respects, so 99% of the time, yes, you will spank the hell out of an SRT4, unless it is rediculously worked.
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Old Feb 15, 2006 | 12:38 AM
  #13  
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From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Preston Smiths car I take it? that thing so rocks lol I remember whan it was in magazines like 10 yrs ago lol Its a runner.

Your 305 should last just fine.

I would recommend a leakdown and compression test to see how things are.

Run a real management system though.

If u do it nicely I could see 12-15 psi intercooled on it.

Like convert to a sy/ty 749 and go slow and easy on learning the tune. It will pay for itself as well as keep your engine together :-)

Lots cheaper than aftermarket stuff too.

later
Jeremy
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Old Feb 15, 2006 | 08:22 AM
  #14  
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Yes, that's Smitty's car. I archived the video as encouragement to all of us "slow" 305 drivers.

FWIW, if you run boost, installing larger runners and plenum is less of an issue.
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Old Feb 15, 2006 | 03:22 PM
  #15  
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From: Waldorf,MD
Car: 87, 88 and 89 Iroc-Z
Engine: 305, and 350
Transmission: 700R, and T-5
Axle/Gears: 3:23 POSI
well im still thinking about the turbo idea so if anybody else has anything else to say about this please do so
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Old Feb 15, 2006 | 03:49 PM
  #16  
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Car: ws6
Engine: ls1
Transmission: m6
Axle/Gears: 3.42
wheelstandin87 Alittle off topic but what mods do you have in your 89 Iroc to run a 13.4?
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Old Feb 17, 2006 | 08:42 PM
  #17  
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Car: 1987 IROC-Z Camaro
Engine: 5.7 350 TPI - SLP Runners, AFPR, MSD Goodies
Transmission: 700R4 - Shift Kit, Corvette Servo
Axle/Gears: BW 9 bolt, 3.27s
If your having to ask if it will work, you probably won't want to do the install.


It would be a scary fast machine though. Single turbo L98s with stock compression, cam, heads have made some 360 rwp+
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