2009 Models for Infiniti
#16
Originally Posted by LiquidGx
Actually its quite complicated. You have to factor in the load on the engine which is constantly changing even though the rpms may stay constant.
Easiest way to "test" the theory. Cruise at 45mph keeping the car in 4th gear, reset fuel economy.
Compare that to cruising at 45mph in 5th gear and the fuel economy. 5th defintely does better at 45mph.
If we had a 6th or 7th, the car should show the same benefit at 70mph+.
#17
#18
Originally Posted by Mike@RiversideInfiniti
yes and no.
6th gear is shorter than the 5th in current 5AT.
5th and current 4th are equal.
7th is the only gear that would improve fuel economy.
6th gear is shorter than the 5th in current 5AT.
5th and current 4th are equal.
7th is the only gear that would improve fuel economy.
Plus, with 7th only being slightly taller than the current 5th, I don't see how there will be significant gains in fuel economy. With 7 gears, I would've hoped 7th would be a highway only type of gear (like 6th on an LS1 fbody, double overdrive). At redline in my Trans Am, 6th gear would top out over 250mph.
But, it made a 340hp car capable of 28mpg on the highway.
#19
Originally Posted by silverG2007
This worries me a bit about the tranny then. From what I've heard, trannies with lots of gears (like 7) can have a problem with "hunting" for gears and shifting all the time (which can get quite annoying).
#20
Originally Posted by stardust
Did any of you read ANY of this thread? https://g35driver.com/forums/g35-sedan-v36-2007-08/224448-official-2009-g37-sedan-changes.html
#21
#22
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