The
Oldcorollas FAQ
An FAQ dealing with KE1x to KE7x Toyota Corollas
Supplement to http://groups.yahoo.com/groups/oldcorollas
1971 3K with no emissions made 73hp. 1981 4K with Californian emissions
system made 60hp. Testing method or emissions strangling?
Removing the emissions system from your Corolla is illegal everywhere I
can think of, but results in improved performance and looks a heap
better. Unfortunately, it's not as easy as just tearing all the hoses
off your 4K-C, as there are at least three different types of
carburettor corresponding to different emissions variations. It is
reccomended you get your hands on an early 3K carburettor and use that
instead.
Otherwise, sit down and study some diagrams and understand what
everything in the emissions system does, you might be able to outsmart
it. If you manage, write down how and tell me!
One useful emissions feature is the fast idle valve, which drops the
engine speed at idle once it warms up, which is handy at traffic lights
in summer. It's a box off the side of the air horn with a pipe joining
top and bottom. You know your fast idle valve is working when you stop
at traffic lights and your motor idles momentarily high then drops.
Another possibly useful feature is the PCV valve, and its accompanying
hose and carby plate. The carb plate doubles as a heat shield from the
exhaust manifold also. It has been discussed that the PCV system is
good, as it removes contaminants from crankcase vapours that would
otherwise pollute your oil quicker and possibly cause carbon deposits
to form. Of course if your motor has excessive piston blowby, you're
going to suck alot of crud into the combustion chambers and coke
up your head quicker. The PCV system may also help to prevent high-rpm
crankcase pressure from building up, as the larger rings in K pistons
seem to start floating around 6-7000rpm.