Gas mileage after big turbo upgrade?
Apr 11, 2010, 10:14 AM
#16
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300 for a tank is not bad. On my stocker I got about 255-265 mostly highway. I'm curious to see what the guys with the 35R are getting? Specially the 3586.... Let's see if someone with this setup can chime in.
Apr 11, 2010, 12:41 PM
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I'm still trying to get over the fact you drive 231 round trip. What do you do if you dont mind me asking...?
Thinking back on it, these guys sound about right, if your not boosting you'll probably get some better mileage, i talked to a shop the yesterday and they said that even w/o a turbo upgrade you'll get better mpg. I think stock A/F is 9:2 if I remember correctly. As long as your not dumping fuel i guess you'd be ok.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
Thinking back on it, these guys sound about right, if your not boosting you'll probably get some better mileage, i talked to a shop the yesterday and they said that even w/o a turbo upgrade you'll get better mpg. I think stock A/F is 9:2 if I remember correctly. As long as your not dumping fuel i guess you'd be ok.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
Apr 11, 2010, 01:30 PM
#18
Thinking back on it, these guys sound about right, if your not boosting you'll probably get some better mileage, i talked to a shop the yesterday and they said that even w/o a turbo upgrade you'll get better mpg. I think stock A/F is 9:2 if I remember correctly. As long as your not dumping fuel i guess you'd be ok.
That is essentially the name of the game. Staying out of boost is so essential to your MPS's. I do not know the stock afr for the x however its definitely going to be rich. A proper tune will help your out in this case whether you have added parts or just want to optimize your stock setup.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
This is where injector scaling comes into play. They can flow more but at the same time if they are properly dialed in they dont just dump in unwanted fuel.
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
When using injection whether its alcohol of water or methanol they all help to reduce temperatures in the combustion chamber. With that being said you can run the car leaner. Most injection systems are triggered on at a certain throttle percentage or boost threshold so if you are driving efficiently you wouldnt even be injecting. If you like to take spirited drives a lot then a kit may help your gas millage. At the same time you will need to fill the tank with meth for example and that isnt free so you should factor that cost in.
That is essentially the name of the game. Staying out of boost is so essential to your MPS's. I do not know the stock afr for the x however its definitely going to be rich. A proper tune will help your out in this case whether you have added parts or just want to optimize your stock setup.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
This is where injector scaling comes into play. They can flow more but at the same time if they are properly dialed in they dont just dump in unwanted fuel.
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
When using injection whether its alcohol of water or methanol they all help to reduce temperatures in the combustion chamber. With that being said you can run the car leaner. Most injection systems are triggered on at a certain throttle percentage or boost threshold so if you are driving efficiently you wouldnt even be injecting. If you like to take spirited drives a lot then a kit may help your gas millage. At the same time you will need to fill the tank with meth for example and that isnt free so you should factor that cost in.
Last edited by heel2toe; Apr 11, 2010 at 05:03 PM.
Apr 11, 2010, 02:40 PM
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I'm still trying to get over the fact you drive 231 round trip. What do you do if you dont mind me asking...?
Thinking back on it, these guys sound about right, if your not boosting you'll probably get some better mileage, i talked to a shop the yesterday and they said that even w/o a turbo upgrade you'll get better mpg. I think stock A/F is 9:2 if I remember correctly. As long as your not dumping fuel i guess you'd be ok.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
Thinking back on it, these guys sound about right, if your not boosting you'll probably get some better mileage, i talked to a shop the yesterday and they said that even w/o a turbo upgrade you'll get better mpg. I think stock A/F is 9:2 if I remember correctly. As long as your not dumping fuel i guess you'd be ok.
Another thing thing tho is, if you upgrade turbo's, dont you need larger injectors? Wouldn't this put more fuel into the cylinder for the bigger turbo? So essentially you'd still be using a lot of fuel?
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
Apr 11, 2010, 02:47 PM
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Heel2toe: Everything you said is true based on my personal experience (with hondas at least). I would just love to get some real facts, from the guys with the 35r turbos. I am almost certain that a properly tuned one, and driving below 4000 rpms should get around 30 mpg at least (if they are still on a 2.0 litter bottom end)
Apr 11, 2010, 03:06 PM
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I am almost certain that a properly tuned one, and driving below 4000 rpms should get around 30 mpg at least (if they are still on a 2.0 litter bottom end)
Everyone else, though, without his tuning tweaks at cruise speed, seem to be basically at ~22-24MPG, no matter the turbo set up.
I went ~1500 miles round trip, 70-80MPH, and got, again, like before, heh, 22MPG on the dot. I'm not nearly smart enough/skilled enough to tweak anything to get better on the highway
What about water/alcohol injectors? Does anyone have these and get better mileage? Thinking on it, if your adding water/alcohol into the cylinder, it should require less fuel = better mpg with a larger turbo. Sorry just throwing thoughts out there...
Apr 11, 2010, 04:57 PM
#23
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[QUOTE=hotdog;8188327]There's a couple other Evo X fuel mileage threads, and HiBoost (his forum name) has done a lot of extensive testing and tuning to squeeze the most out of his gas mileage. He MIGHT be getting near 30MPG, but it required a lot of work; IIRC, he is/was running a GT30 setup of some....
Cool thanks I'm gonna check out some of his threads. I think I'm gonna go ahead and do a 35 or even a 37R with the goal of increasing the mpg to at least +30, and make ***** more power
. I calculated my year savings to be $1996.8 (gas at $3.20). If gas goes up to $5 (worse case scenario) I can save $3120.0 A year!!!! So the turbo upgrade should pay itself off in about 3-4 years...
What do you fellas think, my wife will buy it or stab me in my sleep lol. I think I'm gonna get stabbed....
Cool thanks I'm gonna check out some of his threads. I think I'm gonna go ahead and do a 35 or even a 37R with the goal of increasing the mpg to at least +30, and make ***** more power
. I calculated my year savings to be $1996.8 (gas at $3.20). If gas goes up to $5 (worse case scenario) I can save $3120.0 A year!!!! So the turbo upgrade should pay itself off in about 3-4 years... What do you fellas think, my wife will buy it or stab me in my sleep lol. I think I'm gonna get stabbed....
Apr 11, 2010, 05:01 PM
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Just curious as to what kind of gas mileage are we getting after a bigger turbo upgrade? I figured that if I can find a good enough "excuse" for my wife.... I can go to sleep without having to be worried about getting stabbed while I sleep lol!
I do a commute of about 230 miles a day, so a good saving should do the trick
I do a commute of about 230 miles a day, so a good saving should do the trick
Apr 11, 2010, 05:15 PM
#26
Heel2toe: Everything you said is true based on my personal experience (with hondas at least). I would just love to get some real facts, from the guys with the 35r turbos. I am almost certain that a properly tuned one, and driving below 4000 rpms should get around 30 mpg at least (if they are still on a 2.0 litter bottom end)
FWIW turbos help to atomize the air going into the combustion chamber so I wonder if a larger turbo does that better than a smaller turbo. Personally I think the biggest factor with regards to gaining MPG's with a larger turbo is the increased lag. So with that being said, I think gas millage is mostly affected by your right foot. It takes a talented driver to keep the car out of boost. My car spools so quickly and its just too much fun for me to stay out of boost
