Turbocharged '95 Z28, forged 383
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Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Turbocharged '95 Z28, forged 383
I'm looking for a quick sell on my car. If it doesn't sell quickly, then I'll just keep it.
1995 Black Z28, Auto, T-tops, tan leather, 17X9 GM SS wheels.
57,000 miles
A/C, Cruise, everything works.
Wolfe roll bar with pin-out door bars.
383 stroker, 4340 crank and rods, forged pistons, 8.3/1 compression
AFR 210 Race Ready heads
224/236-114 Comp Extreme cam, Pro Magnum rockers
Ported LT4 intake, 52 mm TB
Custom Turbo kit with a PT-76 GTS turbo (capable of 1150 hp)
Tial 40 mm wastegate, Turbo XS BOV
Water/air aftercooler with 5 gallon tank in trunk
TH-350 & Vigilante 2800 (speedo works also)
84 lb/hr injectors, Acceleronics impedence converter & stock ECM
Crane HI6-TR
Twin 255 lph fuel pumps
Alkycontrol Methanol injection
$18,000, but let me know SOON!
Mike
1995 Black Z28, Auto, T-tops, tan leather, 17X9 GM SS wheels.
57,000 miles
A/C, Cruise, everything works.
Wolfe roll bar with pin-out door bars.
383 stroker, 4340 crank and rods, forged pistons, 8.3/1 compression
AFR 210 Race Ready heads
224/236-114 Comp Extreme cam, Pro Magnum rockers
Ported LT4 intake, 52 mm TB
Custom Turbo kit with a PT-76 GTS turbo (capable of 1150 hp)
Tial 40 mm wastegate, Turbo XS BOV
Water/air aftercooler with 5 gallon tank in trunk
TH-350 & Vigilante 2800 (speedo works also)
84 lb/hr injectors, Acceleronics impedence converter & stock ECM
Crane HI6-TR
Twin 255 lph fuel pumps
Alkycontrol Methanol injection
$18,000, but let me know SOON!
Mike
Thread Starter
Registered User
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Re: Turbocharged '95 Z28, forged 383
It dyno'd 550 rwhp with the T-trim Vortech at 13 psi. Keep in mind that it's a TH350 with a non-lockup converter. In this trim, it ran 10.40 at 133 mph with no weight removed (~3750 lb). The Vigilange 2800 acts more like a 4000 with the torque from a pressurized stroker.
When I first installed the turbo, it dyno'd 530 rwhp at 13 psi. I realized shortly thereafter that I had a leaky BOV (DSM Gen 2) and a restrictive intercooler pipe (2.5" w/ 90 deg miter bend). When I replaced the pipe with a 3" and installed a Turbo XS BOV, it gained 6 psi boost (no kidding) with no changes to the wastegate or boost controller. When I turned the boost back down to 13 psi, it felt faster than the supercharger - my guess is around 570 rwhp due to the efficiency of the turbo versus the supercharger. I've since turned the boost up to 18 psi with the Meth injection, and expect around 670 rwhp through the auto. I do realize, though, that without dyno proof, that doesn't mean much, but it should give you a feel for it.
Mike
When I first installed the turbo, it dyno'd 530 rwhp at 13 psi. I realized shortly thereafter that I had a leaky BOV (DSM Gen 2) and a restrictive intercooler pipe (2.5" w/ 90 deg miter bend). When I replaced the pipe with a 3" and installed a Turbo XS BOV, it gained 6 psi boost (no kidding) with no changes to the wastegate or boost controller. When I turned the boost back down to 13 psi, it felt faster than the supercharger - my guess is around 570 rwhp due to the efficiency of the turbo versus the supercharger. I've since turned the boost up to 18 psi with the Meth injection, and expect around 670 rwhp through the auto. I do realize, though, that without dyno proof, that doesn't mean much, but it should give you a feel for it.
Mike
Last edited by engineermike; Jul 3, 2005 at 11:22 PM.
Thread Starter
Registered User
Joined: Mar 2002
Posts: 2,743
From: Baton Rouge, LA, USA
Re: Turbocharged '95 Z28, forged 383
Keep in mind it's an auto with a loose-ish converter. On high hp combo's the converter gives an abnormally low reading. Mike Murrillo dyno'd ~680 rwhp through an auto with a good converter, but is running in the high 8's in a full-weight street car.
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