[Vwdiesel] Eco Diesel conversion to non eco?
scott3491 at insightbb.com
Sun May 20 06:44:35 EDT 2007
<What is the main difference between the eco and a regular turbo diesel
engine? Is it just a smaller turbo and the nonspaceship pump?
Could I make an eco engine into a "normal" engine simply by replacing the
turbo and pump?
The smaller turbo was included not to increase power, but in order
to inject enough oxygen to reduce emissions. The aneroid was deleted because
it adds fuel at higher rpm, and that would have shortened the life of the
catalytic converter. That was their story and they stuck to it.
The smaller turbo spools up at lower rpm than conventional turbos,
but also flattens out sooner. It accelerates from stoplights better, but
power falls off sooner on hiways.
The transmission seems to be a unique code, too. The engine spins
perceptibly higher at hiway speeds, which decreases fuel economy noticeably.
In order to duplicate the performance of, say, a 1989 A2 TD, you'd
have to replace the pump with one that has an aneroid, retrofit a
conventional exhaust system- which might not be legal- and give serious
thought to replacing the tranny with one that has longer legs.
The cooling fans are linked by a belt that's about the size of a
shoestring and cracks from age and heat. The driven fan bearing will freeze
and take out the belt as well as the primary fan and motor. Removing the
belt and letting it run on the primary fan will work until hot weather, when
it's unable to cool the engine sufficiently, especially with the a/c on.
The wires on the seat belt interlock will eventually crack, find
their own ground, and disable the starting system. Splice them together
before this happens.
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