V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Quick tubo update...

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Old Apr 24, 2004 | 03:17 PM
  #101  
Doward's Avatar
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
BTW, the numbers we slap down with the turbo (as soon as it's complete) will be using the MTC-5 camshaft, on a stock 3.1. So yeah, that's the same numbers you can expect, with the MTC-5 cam, and the VP kit.
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Old Apr 24, 2004 | 03:22 PM
  #102  
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From: Austin, Texas
Car: 2000 Trans Am WS6 (Black)
Engine: LS1
Transmission: 4L60E
so the mtc-5 is the bone stock cam, or a common choice for a rebuild?
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Old Apr 24, 2004 | 03:33 PM
  #103  
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
Mild upgrade -

278/288 SAE
204/214 @ .050"
.422/.444" lift
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Old Apr 24, 2004 | 07:54 PM
  #104  
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From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Originally posted by Gumby
I would not worry about miles.

If it still runs good, boost it. if it run like crap build it.

These engines last forever with little power lose.
On ones taken care of anyways.
No, Gumby.. I trashed the bearings in my 168k mile 2.8 with the equivalent of 2 days of daily driving. High milage motors do not respond well to drastic increases in power output. Some rebuild work is going to be required for this no matter how you go about it. Main and rod bearings at absolute minimum. Valve seals and rings highly reccomended.
Originally posted by Doward
I'm sorry, but if you've got 30+ psi of exhaust backpressure in your turbo, under 15psi of boost, then you've got way too small of a turbo, plan and simple.
On that I agree with you.

Oh.. btw.. stock injectors managed to feed 7psi ... sad to say, my first kill with the turbo... '87 2.8l Camaro LT.. with a driver that seemed absolutely convinced his car was the fastest thing ever produced. It wasn't.
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Old Apr 24, 2004 | 08:17 PM
  #105  
Doward's Avatar
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Joined: Aug 2002
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From: Gainesville, FL
Car: 1988 Chevy Camaro Hardtop
Engine: Turbocharged/Intercooled 3.1
Transmission: World Class T5 5 Speed
You've got a problem there... there's no way stock 13pph injectors are feeding 7psi, unless you're building boost, but the engine just isn't feeding off of it...

Could have the same problem I did - inaccurate boost gauge
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Old Apr 24, 2004 | 09:39 PM
  #106  
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From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
I'm not exactly at sea level.. it's entirely possible. And the boost gauge is dead accurate.. it's an actual vac/pressure tester, remember?
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Old Apr 27, 2004 | 01:46 AM
  #107  
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Joined: Apr 2003
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From: Vancouver, BC
Car: '86 Camaro SC, '16 QX60
Engine: 2.8 V6 POWER, 3.5L V6 N/A
Transmission: T-5, CVT
So what's the latest?
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Old Apr 27, 2004 | 12:26 PM
  #108  
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From: St. Louis, MO
Car: 85' Firebird (Project), 92' RS
Engine: 2.8L, LS1
Transmission: 700R4, 4L60E
Axle/Gears: 3.42 Open , 10 Bolt (ukn)
techsmurf , you'll have a nice setup....like our planes, they actually don't provide "boost" (if they really were, they'd break stuff" but the turbochargers provide that extra force at altitude to allow the engine to breath as if it was at a lower altitude....so in denver, they can act like they're on the ground at neworleans, aka, you'll still outperform the other n/a cars in ur area, even on barely any boost.
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