6. Chrysler
engineers its own fuel, ignition and exhaust emission system for the German
made 1.7 liter engine.
Chrysler Plans Its
Own Four Cylinder Engine
7. The
CAFE law requires a graduated increasingly more fuel efficient passenger
car fleet.
8. Chrysler
decides to become the most fuel efficient US car company.
9. All
new Chrysler cars are to be front wheel drive and four cylinder powered.
10.
Chrysler designs the 2.21 engine for the 1981 model year K-body and plans
to replace the VW 1.71 engine in the L-body.
Chrysler 2.21 Design
Features
11.
Because of the long experience with the VW 1.71 engine Chrysler "models"
many features of the 2.21 engine from the VW 1.7 engine including material
choices for the cylinder head (aluminum) and cylinder block (cast iron)
location of the camshaft, in-line valve arrangement, offset water pump
housing, intake and exhaust manifold on the same side of the head and located
to the rear of the vehicle.
12.
With a need to replace the VW engine the L-body the 2.21 engine is made
as short as possible with siamesed cylinder bores (no water circulates
between the cylinders except for the cross drilling in the 2.21 turbo II
and 2.51 turbo).
13.
The cylinder bore diameter was set at 87.5 mm (3.44") and was never changed.
14.
The 2.21 is designed by the former 340 V8 engine designers and was made
very robust in certain areas particularly the crankshaft and cylinder block.
The crank bearing diameters are very generous at 50 and 60 millimeters.
Other areas needed several design changes and many model years to be improved--
especially cylinder head gaskets and oil leaks.
Manufacturing Strategy,
Locations and Performance Versions.
15.
Because of the fuel efficiency strategy described in item 8 above Chrysler
made very large capital investments in high volume engine machining equipment.
16.
The Trenton engine plant in Trenton, Michigan (south of Detroit) had three
complete block and head machining lines that were fully automated. The
Saltillo Engine plant in Neuvo Leon, Mexico had one block and head line
slightly less automated. Total investment for the 2.21 and 2.5 engines
probably reached over one billion dollars although not recorded by Chrysler
on a lifetime basis.
17.
Because of the large commitment to four cylinder engines, Chrysler had
to use the 2.21 in many applications including minivans and pickup trucks.
Of interest to Shelby Dodge owners are the numerous performance versions
of the 2.2 and 2.51 turbocharged engines produced starting with the 1984
model year and ending with 1993 model year. The 2.2 turbo and 2.51 turbo
are described in two SAE papers 840252 & 900852. The highest performance
2.21 engine produced in volume was the intercooled 2.21 turbo II engine.
18. Although Chrysler does not produce the 2.21 or 2.51 engine today, the 2.21 is alive and well in the Peoples Republic of China. Chrysler licensed the First Auto Works (FAW) of Changchun, PRC to build the 2.21 for the domestic market of China. FAW produced its first 2.21 engine in 1990 and is still in production today.
Peter
Badore 7-11-00