924/944/968 Articles In Excellence – Modified Street Cars


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Title:

Missing Element

Issue:

#138, June 2005, page 90

Author:

Zachary Mayne

Length:

5-pages (2½-pages of text, the rest is photos)

Synopsis:

Mayne test drives a turbocharged Porsche 968, built by Vision Motorsports. With a Garret turbocharger, Motec engine management and a drop in compression ratio to 9.5:1 with Mahle pistons – Vision claims an output of 435-hp and 370 lb-ft of torque with street gas from this engine. They also claim that it makes over 500-hp with 105-octane fuel and 1.1 bar of boost!


Title:

Two Paths to Power

Issue:

#126, February 2004, page 125

Author:

Karl Glynn (owner of Weissach.net)

Length:

4-pages (2½-pages of text, the rest is photos)

Synopsis:

Glynn reviews two very different approaches to turbocharging a Porsche 968. The first example is a modest light-pressure turbocharger conversion from Anderson Motorworks. The second example is a highly modified big-horsepower transformation from PowerHaus.


Title:

Second Wind

Issue:

#99, February 2001, page 134

Author:

Jim Pasha

Length:

7-pages (4-pages of text, the rest is photos)

Synopsis:

Pasha installs a 3.0-liter 944 S2 engine into his 1987 944S. He describes the process of swapping the engine and adding additional upgrades to the suspension and brakes.


Title:

Boosted 968

Issue:

#89, November 1999, page 131

Author:

Pete Stout

Length:

3-pages (2-pages of text, 1-page of photos)

Synopsis:

Stout reviews another David Chen turbo conversion of a 968. This time its a light-pressure system with a compression of 9.0:1 and a K27#8. The customer wanted a “sleeper” car. This car developed developing 335 RWHP (~394 Flywheel-HP). The article covers all the main components used in the conversion.


Title:

Raging Waters

Issue:

#86, June 1999, page 83

Author:

David Colman

Length:

6-pages (3 pages of text, 3 pages of photos)

Synopsis:

Colman talked to Gary Stone who owned a Kelly Moss Motorsports modified 951 and a turbo charged 968. The article provides a good description of both cars though perhaps not in quite the same level of detail as the two articles by Pete Stout below. For the record, the 951 made 305 HP and the 968 360 HP, both on 92 octane gas. With 110 octane race-gas, the 968 made 479 HP. The conversion of the 968 involved a Turbonetics turbocharger, iron sleeved block and a double O-ring for the head.


Title:

Giant Killer

Issue:

#82, December 1998, page 88

Author:

Pete Stout

Length:

5-pages (2¼ pages of text, 2¾ pages of photos)

Synopsis:

Stout looks at a PowerHaus conversion of Graham Gillies' 1989 951. The article takes a detailed look at the conversion which involved taking the displacement up to 2.8L by stroking with a 3.0L crank, a hybrid K27/K29 turbo charger and a host of other modifications. With stock fuel injectors, Graham's car made 415 RWHP (~488 Flywheel-HP) @ 1.3 bar. The article didn't specifically say so but I'd guess this was done with 100+ octane fuel. Further development was planned.


Title:

Jack of all Trades

Issue:

#78, June 1998, page 108

Author:

Pete Stout

Length:

5-pages (3-pages of text, 2-pages of photos)

Synopsis:

Stout reviews David Chen's installation of a turbo charged 968 motor in a 944 Turbo. The article covers the development process, David's custom fabrication, the modified K29 (this one is water-cooled), the test drive and so on. The car reputedly made 374 RWHP (~440 HP at the flywheel) @ 0.8 bar.


Title:

Tech Forum: Hot-Rod 924 and other Fantasies

Issue:

#70, June 1997, page 129

Author:

Jim Pasha

Length:

2-pages of text and tables

Synopsis:

Pasha presents his idea for hot-rodding a 924. Most of it centers around installing a 944S2/968 engine – though he also discusses brakes, suspension and other upgrades.


Title:

For Here Or To Go? - Tempestuous Turbo

Issue:

#55, 08/1995, page 69

Author:

David Colman

Length:

6-pages (4 pages of text, 2 pages of photos)

Synopsis:

Colman reviews a modified 1986 951. It has an AutoThority chipset and MAF kit (which had just come on the market) installed along with a K27 turbocharger – running about 15-17 PSI. There was the typical problems with fueling which was solved by installing a 944S2 fuel pump. There were no dyno numbers for the article but Colman said he was “plastered to my leather bucket seat”.


Title:

Building a 944 Turbo To Challenge The V-8s

Issue:

#26, April 1991, page 73

Author:

Robert Bruce Duncan

Length:

5-pages (3-pages of text, 2-pages of photos)

Synopsis:

Duncan provides an overview of the first 944 Turbo fitted with Andial's 2.8L stroker kit. The car also had some Turbo Cup suspension components fitted to improve handling. While there is some detail on the parts fitted, there are some glaring deficiencies – e.g. there are no power or torque ratings mentioned.