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Thread: Will Longtube Headers increase gas mileage?

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    Almost there Blade's Avatar

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    Will Longtube Headers increase gas mileage?

    If you drive the exact same as you did before?


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    I don't see why they'd hurt gas mileage...

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    Banned explosionhobbit's Avatar

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    IB4someonementionswindowsdowntorque

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    ki ki ki ki ma ma ma ma drivermod's Avatar

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    Maybe a little.

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    My borough's thorough drewsg's Avatar

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    Originally posted by warpedrotors
    IB4someonementionswindowsdowntorque

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    Re: Will Longtube Headers increase gas mileage?

    Originally posted by Blade
    If you drive the exact same as you did before?

    You'd be the first to know if you could actually drive w/o ever tapping the extra power....

    Matt

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    Registered Member Snuffalofogus's Avatar

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    Re: Will Longtube Headers increase gas mileage?

    Originally posted by Blade
    If you drive the exact same as you did before?

    no, cause chances are you'll drive the car harder so you can listen to the sweet symphony that is the LS1

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    Almost there Blade's Avatar

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    I'm gonna test it out next gas tank. Before the LT install, I usually averaged around 260-270 miles before my low fuel light came on.

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    Banned explosionhobbit's Avatar

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    Originally posted by DrewSG3
    i played out the thread in my mind and saw it turning into an argument which eventually led to someone mentioning windows down = more torque... but i also hit my head pretty hard about 7 minutes ago and now i feel nga/kljb lkenb

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    My borough's thorough drewsg's Avatar

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    Originally posted by warpedrotors
    i played out the thread in my mind and saw it turning into an argument which eventually led to someone mentioning windows down = more torque... but i also hit my head pretty hard about 7 minutes ago and now i feel nga/kljb lkenb

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    ki ki ki ki ma ma ma ma drivermod's Avatar

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    Originally posted by Blade
    I'm gonna test it out next gas tank. Before the LT install, I usually averaged around 260-270 miles before my low fuel light came on.
    Thats what I about get. I have a buddy that gets alot more than that per tank. Kinda pisses me off.

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    My borough's thorough drewsg's Avatar

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    I don't see it hurting your mileage, it's basically allowing your engine to breathe better. If there was a gain, I don't think it would be noticeable.

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    It's bad for your fuel pump to run it all the way down to the light, btw...

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    Originally posted by DrewSG3
    what happened, i blacked out

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    Moved to Tech....

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    REAL MEN GET BLOWN! JohnnyLS2's Avatar

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    Technically, your gas mileage should increase as long as you are driving the same way that you did before. But, that normally doens't happen.

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    Registered Member Snarks's Avatar

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    I havent really noticed much change in my gas mileage since my header install. Havent gotten it tuned though, so maybe I will get a little better after that.

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    Assuming you drive the same AND you don't start running pig rich after the install. You should have an increase in gas mileage.

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    my mileage has stayed the same since headers. I was hoping for a little better highway mileage, but no such luck...

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    I was under the impression that headers without a tune meant running rich enough to offset any mileage gain.

    I would think with a tune (and the headers) you'd get better mileage.

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    Registered Member 00_Z's Avatar

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    dunno mine seems about the same, I never let it get that low so I dont know for sure

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    I will experiment on this next tank. I'll have results in a week or so.

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    My mileage stayed the same.

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    My mileage has went down hill ever since I started modding the car.
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    i think my car hates being stock, i get 10mpg on a lid/cutout car! how is that possible, not sure. longtubes if anything will help me out! how do you guys get anything over 160 miles to tank in the city? im at 80 miles per 1/2 tank in the city, when i used sunoco 93 my car got 15/33mpg, here in montreal, shitty 91, 10mpg city and not sure on hwy.

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    Originally posted by JakeY2KZ
    My mileage has went down hill ever since I started modding the car.
    same here.

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    Originally posted by ssrunner
    I was under the impression that headers without a tune meant running rich enough to offset any mileage gain.

    I would think with a tune (and the headers) you'd get better mileage.


    Im untuned and it def hurt my gas mileage. It caused me to run rich.
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    Your normal driving fuel ratio will be mostly unchanged because the car is in closed loop, maintaining that 14.7. That being said, with the O2 sensors being further away than they were in the stock position can cause them to lag in the switching between lean and rich. this can cause a decrease in gas mileage, so try to get your car tuned fairly soon after installing headers. And if you dont, once you get it tuned, better get a new set of O2 sensors.

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    Registered Member Scotty's Avatar

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    I haven't noticed any better mileage, but I suppose it might help just a tiny bit.

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    I used to get around 260 per tank. Now I get about 300 after my long tubes and true duals. Thats with some WOT runs as well.

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    Originally posted by Blk02ls1a4
    Your normal driving fuel ratio will be mostly unchanged because the car is in closed loop, maintaining that 14.7. That being said, with the O2 sensors being further away than they were in the stock position can cause them to lag in the switching between lean and rich. this can cause a decrease in gas mileage, so try to get your car tuned fairly soon after installing headers. And if you dont, once you get it tuned, better get a new set of O2 sensors.
    If you !cats can't you just use your old rear O2s?

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    Engine Lubrication Guru UnleashedBeast's Avatar

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    Originally posted by MIKE2000Z28
    i think my car hates being stock, i get 10mpg on a lid/cutout car! how is that possible, not sure. longtubes if anything will help me out! how do you guys get anything over 160 miles to tank in the city? im at 80 miles per 1/2 tank in the city, when i used sunoco 93 my car got 15/33mpg, here in montreal, shitty 91, 10mpg city and not sure on hwy.
    Sounds like you need to change your 02 sensors, and check your plugs/wires. You have issues that are not normal.

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    I broke what? dudas35's Avatar

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    I got about 3mpg better after long tubes and a tune on the highway. Around town it wasn't as much but maybe it was because i couldn't keep my foot out of it.

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    Registered Member brandon's Avatar

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    Without a tune, my MPG went way downhill

    Stock ~ 22

    4.10s ~ 19

    4.10s + longtubes ~ 15

    =(

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    Registered Member SILV3R's Avatar

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    I usually get between 350-385 per tank. I noticed no change in mileage with the addition of LT's and ORYP. In order to get that kinda mileage I'm about 90% highway and shift at 1500-2000rpm's. I did notice that the motor doesn't feel as good in this rpm range as compared to manifolds.

    I don't believe that running the car til the low fuel light comes on is gonna hurt the fuel pump. The manual says the car holds 16.9 gallons. When I fill up after the light comes on it will hold about 13.5-14 gallons leaving about 3 gallons to spare. This is more than enought to keep the pickup covered. Now if you run it EMPTY, then you'll destroy the pump!
    Last edited by SILV3R; 06-16-2005 at 03:04 AM.

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    At times it absolutely kills milage. Even with cats, you will be a lot louder at higher rpms. It's like drugs, you just can't stay away.
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