Is there such a thing as "over-camming"
08-06-2010, 09:24 AM
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Is there such a thing as "over-camming"
How can you tell if you have too much cam for the motor? What kind of compression is needed for high-lift, long duration cams?
This is just a curiosity question, as Im starting to try and learn a little about cams and how they work in our cars.
This is just a curiosity question, as Im starting to try and learn a little about cams and how they work in our cars.
08-06-2010, 11:18 AM
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To answer both questions: it depends. Also: it doesn't matter. Very few cams are available for the RD unless you want to shell out for a custom regrind. All of the cams you will be able to lay your hands on will be too much for the stock engine management computer.
Too much cam, as in too much lift/duration/overlap, tends to give bad idle quality and poor running at low engine speed. That's why a lot of race engines have high idle speeds (like 2000RPM)
Too much cam, as in too much lift/duration/overlap, tends to give bad idle quality and poor running at low engine speed. That's why a lot of race engines have high idle speeds (like 2000RPM)
08-06-2010, 03:31 PM
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It's a lot easier to run into an issue with forced induction. Too much overlap and your boost will end up blowing through the combustion chamber into the exhaust.
It's a lot easier to run into an issue with forced induction. Too much overlap and your boost will end up blowing through the combustion chamber into the exhaust.