Increased MPG

SouthArk370Z · 09-22-2014, 04:53 PM

It depends on if you are looking at comparing MPG to throttle position or power output. If you use the same throttle position, then yes, miles per gallon will drop because you are moving more air/fuel and producing more power. If you use the same power output then, because of increased efficiency, fuel consumption will drop. Of course, there are many other real-world variables (especially that right foot) and we are talking about a sports car, so it's kinda like arguing about how many angels can dance on the head of a pin. :P

Chuck33079 · 09-22-2014, 04:54 PM

Quote:

Originally Posted by SouthArk370Z

It depends on if you are looking at comparing MPG to throttle position or power output. If you use the same throttle position, then yes, miles per gallon will drop because you are using moving more air/fuel and producing more power. If you use the same power output then, because of increased efficiency, fuel consumption will drop.

I'm pretty sure you just hit the nail on the head.

SlowRollin · 09-22-2014, 05:38 PM

Sounds like I need to lighten my foot a bit and enjoy the ride, thanks guys!

SouthArk370Z · 09-22-2014, 05:47 PM

Quote:

Originally Posted by SlowRollin

Sounds like I need to put my toenails in the radiator and enjoy the ride, thanks guys!

Fixed

Edit: There was a real-time MPG monitor in my '09 Touring; if you have that, you may find it helpful. Or get an app for monitoring different variables. Also check out some of the hyper-miling sites. I doubt if anyone here would go to the extremes that they do, but there is still a lot of good info.

dmhenderson · 09-24-2014, 04:46 PM

I can say with some certainty that a supercharger and upgraded injectors/fuel pump do not help your gas mileage so you can cross those off the list.

Sent from my iPhone using Tapatalk

SlowRollin · 09-28-2014, 10:47 AM

How about this.... HFC and CBE. Better flow but no change to the air/fuel mixture. Nice performance increase too? Of course, Fast Intentions seems like the winner for both parts.

Jordo! · 09-28-2014, 02:10 PM

Quote:

Originally Posted by SlowRollin

How about this.... HFC and CBE. Better flow but no change to the air/fuel mixture. Nice performance increase too? Of course, Fast Intentions seems like the winner for both parts.

Better flow (i.e., more air) + same mixture ratio = more power and poorer MPG. It will add fuel to maintain same AFR via fuel trims to target. The faster exhaust can escape, the more air can be sucked in, so same result whichever side you improve flow on.

On a related note, everyone will make less power and have better MPG in the summer and more power/worse MPG in the winter, all else being equal...

SlowRollin · 09-28-2014, 09:04 PM

Oh well. I guess I'll just get a gas card with a discount and floor this motha.

09-22-2014, 04:53 PM	#1 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	It depends on if you are looking at comparing MPG to throttle position or power output. If you use the same throttle position, then yes, miles per gallon will drop because you are moving more air/fuel and producing more power. If you use the same power output then, because of increased efficiency, fuel consumption will drop. Of course, there are many other real-world variables (especially that right foot) and we *are* talking about a sports car, so it's kinda like arguing about how many angels can dance on the head of a pin. :P Chuck33079 likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

09-24-2014, 04:46 PM	#5 (permalink)
dmhenderson A True Z Fanatic Join Date: Feb 2011 Location: Maryland Posts: 5,930 Drives: AWD TT 370z Rep Power: 27	I can say with some certainty that a supercharger and upgraded injectors/fuel pump do not help your gas mileage so you can cross those off the list. Sent from my iPhone using Tapatalk Jordo! likes this. __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Increased drag with wider tires	Limeybastard	Wheels & Tires	13	07-01-2014 01:57 AM
Increased amount of CHP activity	ggiwin	Southern California Region	40	10-23-2011 04:50 PM
Increased Valve Noise After Change To Amsoil	iwasgointo	Nissan 370Z General Discussions	40	09-01-2010 03:34 PM
Does increased Power increase Efficiency?	Forrest	Engine & Drivetrain	12	05-26-2009 05:22 AM

09-22-2014, 05:38 PM	#3 (permalink)
SlowRollin Base Member Join Date: Sep 2014 Location: Orlando Posts: 46 Drives: 14' 370z Tour/Sp AT Rep Power: 11	Sounds like I need to lighten my foot a bit and enjoy the ride, thanks guys!

09-28-2014, 10:47 AM	#6 (permalink)
SlowRollin Base Member Join Date: Sep 2014 Location: Orlando Posts: 46 Drives: 14' 370z Tour/Sp AT Rep Power: 11	How about this.... HFC and CBE. Better flow but no change to the air/fuel mixture. Nice performance increase too? Of course, Fast Intentions seems like the winner for both parts.

09-28-2014, 09:04 PM	#8 (permalink)
SlowRollin Base Member Join Date: Sep 2014 Location: Orlando Posts: 46 Drives: 14' 370z Tour/Sp AT Rep Power: 11	Oh well. I guess I'll just get a gas card with a discount and floor this motha.