Quote:
Originally Posted by bbejj123
a little off topic but wouldnt a lower ratio'd rear end theoretically help in emissions?
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It depends on that standards used to judged emissions.
If you're talking about low speed dyno tailpipe testing, then it depends if your engine makes more emissions at lower RPM or not. If yes, then lower ratio will not help.
Some state requires certain gears to be used for testing, and if you go too low in gearing your engine will bog.
If you're talking about cruising, then maybe yes maybe no. Lower cruising speeds may produce more emissions in ppm, but you're spewing out less nominal count so it may be better.
It really depends. Nobody knows.