Quote:
Originally Posted by oil pan 4
Not really. I turned the carb only, I don't think I touched the timing and got a 20% mpg boost over a proper carb tune.
The only way to detune the top end is intentionally screw up the ignition timing which would just make it run less efficient or put in a smaller cam or use something like Rhoads hydraulic lifters that are extra leaky from the factory and make it seem like you have a smaller cam at idle for sure and slightly smaller below 2,000 to 2,500rpm then they pump up to full lift by 3,000rpm.
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The 2009 Toyota Prius is a fuel injected vehicle. It doesn't have a carburetor.