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I am doing test with the superchips as we speak have 13 whole fuel tanks logged with manually calculated mpg...my wife and I feel only a difference on 93 octane. I think the people that feel any results are mainly people with automatic as it helps shift points. No custom programs that incorporate CAIs or after market exhaust.
 

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It pinged on occasion under load when it was stock too; not quite as easily but it did it.

I've got my own little suspicion that it has something to do with the heat under the hood and the temp of the air being fed. Maybe I can free up funds for a snorkel finally.
I 100% agree that this hood holds the heat of the engine in and thus the intake sucks it in. While doing all my gas tank testing(all 13 tanks), I have been monitoring the IAT using the superchips plugged in while driving down the highway. All I have to say is WOW the engine heats up the intake tube and housing thus it then heats the air coming in as it goes through the intake. I would really love to run a test of a my crappy AFE intake temp, versus the stock one. Let me explain. The stock intake although looks restricting is actually smooth on the inside. However the RIBS on the outside act like heat sinks, to help reduce heat(My theory ofcourse). Anyone got a stock intake box would donate to the cause.(I normally never throw anything away but I threw my stock one away-I know I know DumbA**). I have actually been thinking about wrapping the intake tube with exhaust wrap to see what testing differences it would give me especially when combined with a AEV hood. I really would also like to know the IAT temp of people who have a AEV hood, and then also the know the IAT temp of people running both a AEV hood and snorkel, with relatively to the outside air temp ofcourse and how fast your driving and if you are behind someone on the road.
 

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What kind of milege increases, if any, are you guys seeing? I am considering a JK Unlimited and a daily driver and the factory estimated MPG doesn't look too inviting...

Thanks.
I'll be nice, and say that if you are in it with one main focus on MPG then a Wrangler probably isn't going to fullfil your needs and thus you will end up hating wranglers. They are box going threw the wind..... not necessarily aerodynamic.

I achieve 17mpg in the extreme city driving(WITH EXTREMELY Light pedal work) and 19-20mpg with a max of 72mph on a down hill slope. Overall average... around the low side of 18mpg
 
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