GT mods and gas mileage
08-01-2010, 09:31 PM
#1
Staging Lane
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GT mods and gas mileage Im going to be picking up an GT soon (unless something terrible happens) and im going to use it as a daily commuter... probably around 25k miles a year or so :o
Of course i wouldnt mind a bit more power, but i can end up with GXP type fuel economy... and id like to keep 87 oct as well (at least 89?)
What are the options? Im going to keep the stock exhaust (at least cat back) but headers and an electric cut out would work.
how do those with a standard CIA/exhaust/tune etc... for power #s and mileage?
thoughts?
Of course i wouldnt mind a bit more power, but i can end up with GXP type fuel economy... and id like to keep 87 oct as well (at least 89?)
What are the options? Im going to keep the stock exhaust (at least cat back) but headers and an electric cut out would work.
how do those with a standard CIA/exhaust/tune etc... for power #s and mileage?
thoughts?
08-02-2010, 07:40 AM
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With my listed mods I lost 3-4 MPG highway (namely due to the DOD delete) and I get 13-14 and change kicking it around town instead of 15-16 (I never averaged up to 16 mpg non-highway anyway). CAI+headers+tune combined I gained 40-45hp maybe?
08-02-2010, 07:51 AM
#4
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From his list of mods I would say yes he tuned it out...
The other route is pulling the top half of the engine off and changing the lifters...but if you go that far most do a cam swap while they have it apart.
The other route is pulling the top half of the engine off and changing the lifters...but if you go that far most do a cam swap while they have it apart.
08-02-2010, 08:24 AM
#5
Staging Lane
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Im not interested in getting into the motor. I need to keep reliability and gas mileage etc...
08-02-2010, 03:54 PM
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With my mods in sig. I run 93 octane (cost all of $3 more a tank full) but pull 363WHP and 368WTQ average about 15 City and 26 Hwy on long trips cruising about 70MPH the entire way. Those calculations are done manually not by the car but are usually with in .2 MPG or each other.
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08-02-2010, 07:35 PM
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With my mods in sig. I run 93 octane (cost all of $3 more a tank full) but pull 363WHP and 368WTQ average about 15 City and 26 Hwy on long trip uising about 70MPH the entire way. Those calculations are done manually not by the car but are usually with in .2 MPG or each other.
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08-03-2010, 11:42 AM
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08-03-2010, 10:52 PM
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08-03-2010, 11:51 PM
#15
I drive it normal, probably harder than most people would call normal but I dont race from light to light either like my wife does, lol. Tuning made the biggest gain in mileage by far, hands down. I have many hours in my tune and tried playing with dod setting and in the end turned it off and was able to get better mileage with it off.
08-05-2010, 07:36 AM
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I would probably get better then 15 city, but hell I can't manage to leave a light with out acting like a damn fool or taking a hard say 80-90* turn and kicking the *** end out. So that is my bad, but it's fun none the less. Last night on the way home from the track I was getting 25.8 MPG, that's not to bad.
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08-05-2010, 08:49 AM
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I would probably get better then 15 city, but hell I can't manage to leave a light with out acting like a damn fool or taking a hard say 80-90* turn and kicking the *** end out. So that is my bad, but it's fun none the less. Last night on the way home from the track I was getting 25.8 MPG, that's not to bad.
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08-06-2010, 11:25 PM
#19
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I get 19.5mpg .. mixed about 1/2 around town and 1/2 on the fwy.. (most of the time I am on the 91fwy.. people in SoCal know what that's like...)
Avg Speed is 35mph... so says my super awesome car computer..
Avg Speed is 35mph... so says my super awesome car computer..
08-07-2010, 09:40 AM
#20
Just did a little road trip up to RPM... about 250 miles round trip. Averaged 21-22MPG at 80MPH but went up to 24 once I slowed down to 65-70 due to traffic. So the gears only impacted fuel mileage a little, well worth the loss of MPG! I used to be able to eek out 25-26 cruising at 70 prior to the gears.
