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Old 09-16-2016, 05:25 PM   #41 (permalink)
Tinkerer
 
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Location: Tennessee
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Silver - '15 Mazda CX-5 Sport
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90 day: 37.23 mpg (US)
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I picked up 3mpg doing under drive pulleys, stainless headers and 3 inch Gerlisch straight through muffler on my 99 4wd Silverado 3dr. I did much of what you had done first and was frustrated with 13mpg mixed city.

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Mirror deletes, 80% grill blocks, wheel covers, 50 psi tires = 6% better MPG avg. over a year. Wheel skirts overcoming ethanol winter fuel mpg losses and more!
http://ecomodder.com/forum/showthrea...ead-30641.html
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Old 09-30-2016, 08:45 AM   #42 (permalink)
Studying Brick economics
 
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Join Date: Feb 2016
Location: Kenly, NC
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Tahoe - '04 Chevrolet Tahoe LT
90 day: 12.27 mpg (US)
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Switched to 89 oct and did a lot of none AC driving at 50-53 mph to and from work. Got a current best tank of 19.22mpg. Absolutely blown away right now.

Tomorrow I was going to trade the Tahoe in for a C4 Corvette for fun and MPG reasons... the 20mpg tank is now in sight I'm having second thoughts about getting rid of the Tahoe for the Corvette.

On the other hand I'm sure I can pull 30mpg out of the 6 speed C4 I'm looking at getting and it'll be a lot faster, just less practical.

I'm very split right now.
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Old 10-05-2016, 08:20 PM   #43 (permalink)
Studying Brick economics
 
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Join Date: Feb 2016
Location: Kenly, NC
Posts: 29

Tahoe - '04 Chevrolet Tahoe LT
90 day: 12.27 mpg (US)
Thanks: 2
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Ended up not getting the Corvette.

The Tahoe modding continues. I'll be doingmore like a 75% grill block here when I get back from a business trip till the end of October. Temps should have dropped enough to where this is a non issue.
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Old 10-06-2016, 10:15 AM   #44 (permalink)
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Location: NewMexico (USA)
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Sub - '84 Chevy Diesel Suburban C10
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camaro - '85 Chevy Camaro Z28

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90 day: 26.43 mpg (US)

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I saw your intake temperature was 80F.
Have you thought about a warm air intake?
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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Old 10-06-2016, 11:44 AM   #45 (permalink)
Studying Brick economics
 
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Join Date: Feb 2016
Location: Kenly, NC
Posts: 29

Tahoe - '04 Chevrolet Tahoe LT
90 day: 12.27 mpg (US)
Thanks: 2
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Yeah, the performance and engine safety half of me doesn't want to do that but the eco half really does.

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