Quote:
Originally Posted by 406 Q-ship
Not right either, there was emission equipment as early as 1967 (A.I.R and PCV). The compression didn't start to drop until 1971 (minor drop) and plumeted in 1972.
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The new regulations that were implemented for 1970, were what led to lower compression engines.
What I've researched is that when GM engineers were testing vehicles with lower compression engines they found that the drum brakes were inadequate, and stopping distances greatly increased. (Implementation of PVC and A.I.R. had no effect on stopping distances, on pre-disc brake vehicles.)
Disc brakes then became mandatory in order to stop the newer vehicles in an acceptable distance with respect to safety.
Obviously if drum brakes were not doing to do the job and disc brakes can do the job, then it logically follows that disc brakes are better.
If my research is wrong, then so be it. I'm man enough to admit when I'm wrong.
But either way, (research right or wrong) my conclusion is disc brakes stop better than drums.