Thread: NEW Hypermiling thread
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  #38  
Old 01-16-2014, 02:56 AM
Omerta Omerta is offline
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Quote:
Originally Posted by Helihover View Post
This is something I've always wondered about. So is the FIS injecting less fuel than what is needed to idle to bring down the rpms?

Also, a car going up hill in say 5th gear @ 2000 rpms @ 75% throttle. Same car going up the same hill, same speed, in 3rd gear @ 4000 rpms @ 25% throttle. Which one is getting better fuel mileage? My thoughts are if the car is FI, it would be the 5th gear and opposite for a carbureted car.

Any thoughts?



Its a delicate balance of heat transfer, dP over the throttle plate and friction at speed. In general you would want to be between 2000 and 3000 rpm and at part load (30-60% throttle).
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