Turbo effects on MPG while in boost range

stang98gt · January 30th, 2012, 11:07 PM

Alright. So I know a lot about turbo's, and their effects; but I can't seem to find any info on the question stated in the title ^^.
I'm new to the forums, so What's up everyone.
If any of my stang brothers out there have turbo's, and want to chime in on the effects "while in boost range", it would be much appreciated.
I just want to know

- how much less efficient it is compared to what you would normally get while out of your boost range.

Because when I get everything hooked up, my turbo will be spooling around 2500-2800 RPM's.

Thanks guys.

sharkbait · January 30th, 2012, 11:09 PM

Unless your really into the throttle your car isnt going to be spooling up the turbo. So your gas mile stays about the same.

WickedSnake00 · January 31st, 2012, 09:15 AM

Generally more boost means you're pushing more air, and to keep the mixture stoich, you need more fuel, thus worse gas milage.

However under light load, the drive pressure is low, so you won't be pushing much boost. As long as you stay well below the torque curve you won't see much boost or worsened fuel economy.

That and when cruising it isn't hard to stay under 2500 RPM at all. Low RPM and low load and you'll keep your MPG's down.

Tang Stang · January 31st, 2012, 11:40 AM

Originally Posted by stang98gt

Because when I get everything hooked up, my turbo will be spooling around 2500-2800 RPM's.

That doesn't mean you'll be driving around under boost at 2500+ rpm. You can cruise along at 4K rpm at low throttle and remain under vacuum. That spool range is applicable at WOT.

nkausch · January 31st, 2012, 12:15 PM

Correct. If your not WOT all the time you should really notice a huge difference.

Tang Stang · January 31st, 2012, 12:17 PM

Originally Posted by nkausch

Correct. If your not WOT all the time you shouldn't really notice a huge difference.

Fixed.

January 30th, 2012, 11:07 PM	#1
stang98gt Soon to Turbo 1998 Mustang GT 14.73 missing third :p Join Date: Jan 2012 Location: Space Coast FL Posts: 1 iTrader: 0 reviews	Turbo effects on MPG while in boost range Alright. So I know a lot about turbo's, and their effects; but I can't seem to find any info on the question stated in the title ^^. I'm new to the forums, so What's up everyone. If any of my stang brothers out there have turbo's, and want to chime in on the effects "while in boost range", it would be much appreciated. I just want to know - how much less efficient it is compared to what you would normally get while out of your boost range. Because when I get everything hooked up, my turbo will be spooling around 2500-2800 RPM's. Thanks guys.

January 30th, 2012, 11:09 PM	#2
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	Unless your really into the throttle your car isnt going to be spooling up the turbo. So your gas mile stays about the same. __________________ 410rwhp 520rwtq @ 12.9 psi

January 31st, 2012, 09:15 AM	#3
WickedSnake00 MM's king of Neon's 404 - car not found 17.81@87 Join Date: Aug 2010 Location: Diesel Engine Capital of the World, Columbus, IN Posts: 7,373 iTrader: 0 reviews	Generally more boost means you're pushing more air, and to keep the mixture stoich, you need more fuel, thus worse gas milage. However under light load, the drive pressure is low, so you won't be pushing much boost. As long as you stay well below the torque curve you won't see much boost or worsened fuel economy. That and when cruising it isn't hard to stay under 2500 RPM at all. Low RPM and low load and you'll keep your MPG's down. __________________ Official Secondhand Snake Build Thread Here Looks Like a Cobra, Sounds Like a Cobra, Tastes Like a Cobra, Not a Cobra. For Sale: P71 Interceptor motor

January 31st, 2012, 12:15 PM	#5
nkausch Enthusiast 94 Mustang Gt Join Date: Jan 2012 Location: Central, NJ Posts: 568 iTrader: 0 reviews	Correct. If your not WOT all the time you should really notice a huge difference. __________________ 94 Mustang Gt Vert-Mods: Tubular Headers, BBK Catted X, SLP Loudmouth 2's, EGR Delete

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