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Old April 27th, 2018, 04:50   #15
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Join Date: Oct 2005
Location: Newark, OH
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Note that my hybrid's exhaust heat exchanger is post-catalytic converter, for precisely that reason. Recover heat to speed warm-up (helping engine durability, emissions, efficiency, and cabin comfort), but only what the cat doesn't need.

(Also, AFAIK the Gen 4 Prius now takes its EGR after that heat exchanger, meaning it doesn't need a separate EGR cooler, and because it's now post-cat, hopefully the intake clogging problems that the Gen 3 is known for will be reduced or eliminated.)

Originally Posted by Lug_Nut View Post
The really cool ToofTek made "Emperor's Clothes" injector fork risers only worked until someone pointed out that there wasn't any thing there.
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