What can I do with a Porsche 928?
Porsche 928: Performance Modifications With some subtle upgrades which should improve engine note, throttle response, low-end torque, and peak horsepower for minimal costs in the $500 range, the 928 can be easily modified into a tarmac-churner. By Thomas Parry – April 14, 2015 This article applies to the Porsche 928 (1979-1995).
Can a Porsche 928 be modified for tarmac?
With some subtle upgrades which should improve engine note, throttle response, low-end torque, and peak horsepower for minimal costs in the $500 range, the 928 can be easily modified into a tarmac-churner. This article applies to the Porsche 928 (1979-1995).
How big are the Pistons in a Porsche 928?
The depth of the dish is about 7 mm. The pistons are fairly large, measuring 62 mm long from the top, and have a weight tolerance of +/- 4 grams. Figure 1. S4/GT piston.
What kind of intake manifold does a Porsche 928 use?
The GT engine uses a 4R intake manifold which was used on all late model 928s. What is unique for the GT engine is that its intake manifold included port matching with the cylinder heads. The cylinder heads were hand picked to match up, and this increased the CFM (cubic feet per minute) rate for the intake.
When did the Porsche 928 GT engine come out?
It was a step up from the S4 engine which was originally released in 1987. It made some remarkable improvements such as generating an additional 10 horsepower up from the S4’s 316 HP and is half a second quicker going from 0-60 MPH.
The depth of the dish is about 7 mm. The pistons are fairly large, measuring 62 mm long from the top, and have a weight tolerance of +/- 4 grams. Figure 1. S4/GT piston.
The GT engine uses a 4R intake manifold which was used on all late model 928s. What is unique for the GT engine is that its intake manifold included port matching with the cylinder heads. The cylinder heads were hand picked to match up, and this increased the CFM (cubic feet per minute) rate for the intake.
What’s the difference between Porsche S4 and GT engine?
The differences between the S4 and GT engines are subtle, but the GT features a different camshaft, head and intake manifold matching, as well as a specialized ECU calibration. The GT engine was only available with a five-speed manual transmission. Compression Ratio: 10.0:1
What was the top speed of a 1985 Porsche 928?
A new, 5.0-liter, DOHC 32-valve V-8 came to the U.S. market for 1985. With it came a bump in power to 288 hp and a top speed of over 155 mph. Other changes included new synchromesh for the gearbox and a shorter, lower shifter as well as a new radio antenna and new front seats.
Who was the Managing Director of Porsche in 1978?
In planning the 928, Ernst Furhmann, Porsche’s managing director (and the first person outside of the family to head the company), pushed for a GT car with a more conventional layout than the old-school 911. That is, using a water-cooled engine up front.
Is the Porsche 928 a replacement for the 911?
The Porsche 928 for a while was also planned to replace the aging 911. As sales of the rear-engined sports car had a slump, it was thought that a new model was needed to replace the 911. This idea was later changed and as we know the 911 has now been with use for over 50 years.
What’s the average price of a Porsche 928?
The last model was the most comfortable, featured the most powerful engine, and the most luxurious interior of all. Though an average Porsche 928 sells for about $78,000 and up, the 1979 Porsche 928 driven by Tom Cruise in Risky Business sold for about $490,000 a few years ago.
Are there any suspension modifications for the Porsche 928?
For individuals tracking their 928 and looking to eliminate every last bit of chassis flex, chassis braces may provide the answer. Individuals who track their car may run a significant amount of negative camber to improve cornering, but lose out on braking and straight line stability from reduced tire contact patches.
What kind of shift pattern does a Porsche 928 have?
Buyers chose between a five-speed manual or a three-speed automatic borrowed from Daimler-Benz. Manual cars have a shift pattern with first gear to the left and back, which makes sense for racing but seemed like an odd choice for something driven around town and on high-speed cruises.