Here are some pictures of John Thomas' Porsche 928 S4
It was a 1989 Guards Red automatic that came out of a collection in
southern California with about 110,000 miles.
They started with a “base kit”, a turbo, oiling pump and little else
from STS that we could use. The 928 engine is pretty unique in its
set-up and tuning was an issue as well with a separate LH and EZK for
fuel management and timing. Everything else was custom for the Porsche
928.
Not too long into the project, they lost a very old headgasket and
spent a year re-building the engine. They bored it out to 43,
just a little over stock, nikicelled the engine, and put in forged
pistons and rods, lowering the compression to 9:1 from the stock
10:1. They could have rebuilt it in a month, but the pistons took a
year to produce.
The car currently produces 400 horsepower and 438 pounds of torque to
the rear wheels, and runs in the low twelve’s at 10lbs of boost with
no intercooler needed. Based on a cost per horsepower basis, the kit
is very competitive to both the supercharged and stroker approaches
to big horsepower engines.
1/4 Mile ET: 12.434
1/4 Mile MPH: 117.030
1/8 Mile ET: 8.179
1/8 Mile MPH: 90.260
0-60 Foot ET: 2.074
Temperature F: 77.0
Car Make: Porsche
Car Model: 928
Car Type: S4
Car Year: 1989
Driver: John Thomas
Very nice 928 John - WOW!
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