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Posted by 95weclipse, Nov 4, 2012
Newbie Forum - Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum.
These cars don't really get good mileage unless your really really light footed.
I run my stock 16inch tires at 35lbs and that helps reduce rolling resistance.
Your numbers are close to normal for a 3000LB beast what the 2G vehicles almost weighs in.
Plus, you have a driveshaft running the back wheels and that eats up fuel pretty good as well since one motor is driving four wheels. If you were a GS NT with the 420A motor, then you might gain a couple of miles due to being FWD.
300 miles a tank is also about norm for city/hgy driving with these things.
And stay away from E-85 .. we don't have the protection to use that corrosive fuel along it will kill your MPG in a heartbeat. E-85 is made for the new cars that are 'flex fuel' qualified.
Lose about a half ton and then you might get some higher numbers...or, get a Honda for they have smaller motors, lighter chassis and sip fuel as a Honda are known for.
Next time I will try to retard timing as well so I can cut little more fuel so the mpg is more and heating is less...
If you got heating issues, look more into the A/F setup to get that balanced - from a lean issue to a more balanced issue.
Sorry, you just can't have mega performance and great gas mileage at the same time.
It takes fuel for performance, but if economy is what you want, either pull the motor out and put in a 1.8L, or get a smaller car that does give you the economy.
Just the nature of the game.
Yea, e85 is terrible. It allowed me to make over 550whp and get 25mpg on the freeway. Guess I better go back to 92 octane since my car isn't "flex fuel qualified".
Its not acid it won't melt a whole through your gas tank. And those of us that do run it (i plan to in spring) have proper supporting mods. U don't just go to the pump n fill it up with e85 and drice off on your merry way it requires specific tuning and op doesn't even have a safc to tune with yet your warning him to stay away from it. Nonsense.
As for mpg, sorry op I think 20 is good I'm lucky if I get 17 or 18. Alright I don't know how some of you guys can Daily a dsm you definitely need a daily driver to own a DSM. My slobalt gets about 36mpg. Has absolutely no power. But it gets me to work and back for less then half of what the gsx would cost me
However, you both have valid points. E-85 is not supposed to be used in the stock fuel system of the DSM. But if you replaced certian fuel components, you will be able to run E-85 successfully without any issues other than a tune of course.
of course i only boosted like 2 times.
tire pressure is like 35 psi i believe for me
40 with ecm link on a turbo motor?
Turbo doesn't hurt mpg and in ways in can help.
start [ECMTuning - wiki]
You can also post logs in the Tuning and Engine Management section of the site for more help with your tune.
I get better without tuning.