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Old 11-18-2008, 02:21 PM   #57 (permalink)
mkiitmr2
EcoModding Lurker
 
Join Date: Nov 2008
Location: Florida
Posts: 18

MR2 Turbo - '93 Toyota MR2 Turbo
90 day: 28.28 mpg (US)
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Quote:
Originally Posted by Johnny Mullet View Post
Here are what normal vacuum readings should be on a properly working gauge and a properly running engine.............

IDLE - 18-22
DECEL - 22-30
ECONOMY - 10-18
POWER - 0-10

The goal to saving fuel is to monitor it while at cruising speed. Keeping a constant reading like 10-12 will net the best results. While getting up to speed, but never accel hard so it drops below 5 because that is just a waste. Watching it at idle will tell you if the engine is running properly. The gauge should really not fluctuate at idle more than 2, but some gauges are not as accurate as others.
Do these numbers apply to a turbocharged car as well? I have a vacuum/boost gauge installed on my car. But I need help finding what you call the "sweet spot" for best economy. How can I find the most efficient vacuum range for my turbo car? What is the best vacuum reading to cruise at constant speed at? Thanks alot.

ERIK
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