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Gas Saving Mods

This is a discussion on Gas Saving Mods within the Firebird / WS6 forums, part of the Vehicle Specific category; My best mpg was 27.4 on a trip from Carmichaels, PA to Dayton, OH for the TA Nats in2006. That's ...

  1. #41
    Member 02ragtop t/a's Avatar
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    sunset orange metallic
    2002 T/A convertible

    My best mpg was 27.4 on a trip from Carmichaels, PA to Dayton, OH for the TA Nats in2006. That's with the top down and doing about 70 mph all the way. Around town ( congested northern NJ city) I get about 11-13 mpgs. Only mod to the car is an SLP LM II cat-back. Usual highway mpgis about 22-25. Not too bad for cruzin down the GSP at abot 75-80mphs.

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    Quote Originally Posted by BlackTAWS6 View Post
    Is that the 2 stroke from walmart that you are using? If so, why? I actually put the same thing in my cummins for the fuel pump, but at 1oz/gallon.

    Best mpg i have gotten is 31mpg (twice). Got it in New Mexico/West Texas area doin 75-80mph (on I-10) for virtually the whole tank.

    Check this out: Been testing

  3. #43
    TA Nut BlackTAWS6's Avatar
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    makes sense to me. haven been doing it in the truck for years. will start tomorrow.

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    Quote Originally Posted by shady milkman View Post
    get another car....that is the best gas saving mod...if you baby dick the throttle on a ls1 in a musclecar/sports car to save money...not only are you in the wrong car..but you are in for a world of hurt...drive the piss out of the car...gun it at every light...fight every fight with her..and enjoy low teen mileage
    roflmao, i love you.

  5. #45
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    my dads old 99 z28 camaro M6 got 28-30MPG (no A/C) didnt work lol

    think was a beast on the highway. ....i think someone swapped out the rear end for a 2.73 rear end...i could cruise 90MPH at little over 1500 RPM'S pretty fuel efficient i'd say:P my auto never got more than 20 even stock-.-

  6. #46
    Senior Member Too Fast's Avatar
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    ^^^Maybe someone did do that rear ends swap. I do about 1600 RPM in 6th at 70 right now with the stock 3.42.

    The '98 Trans Am, with 2.73 and AT, I would get 25-27.3 highway. It would only go high 13s @ 100-103.

  7. #47
    its short but its skinny. jiveass's Avatar
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    Quote Originally Posted by Too Fast View Post
    ^^^Maybe someone did do that rear ends swap. I do about 1600 RPM in 6th at 70 right now with the stock 3.42.

    The '98 Trans Am, with 2.73 and AT, I would get 25-27.3 highway. It would only go high 13s @ 100-103.
    my 95 t/a had 2:73's and yea i could do 70 and only be pullin about 1600 rpm..whereas the 2000 formula would be around 2100 at 70mph with the 3:23

  8. #48
    Member BirdCountry02's Avatar
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    How many gallons are in a 1/4 tank? Is it about 3.5?

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    Quote Originally Posted by BirdCountry02 View Post
    How many gallons are in a 1/4 tank? Is it about 3.5?
    The 99 and up are 16.8 gallons, so 4.2 is 1/4 or a full full full tank

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by Zinergy View Post
    The 99 and up are 16.8 gallons, so 4.2 is 1/4 or a full full full tank
    yep and you can probably add about a gallon or so to that because it seems GM and all the other car manufacturers fudge the "E" mark on the gauge a bit so that you actually have a little extra wiggle room when you start running out of gas. So 1/4 tank might really be 5 to 5.5 gallons.

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    Senior Member Too Fast's Avatar
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    I've never gotten more than 15 gallons in my car. And it has been on E or just below, so it must be a lot of wiggle room on my particular car.

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
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    For me, at about 1/8th tank, my car will take about 13 to 13.5 gallons to fill up.

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    Not sure how much heat our fuel pumps generate, but I always try to keep at least 5 gallons in the tank as I assume the fuel also acts to keep the fuel pump motor cool. Any validity to this?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Not sure how much heat our fuel pumps generate, but I always try to keep at least 5 gallons in the tank as I assume the fuel also acts to keep the fuel pump motor cool. Any validity to this?
    I do the same.

  15. #55
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    Quote Originally Posted by BashamWS6 View Post
    i could use better gas mileage....
    what are some mods and tricks?
    park it...

  16. #56
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    I get about 200-230 miles out of tank and thats 95% city driving. And I might floor it once per tank.

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Not sure how much heat our fuel pumps generate, but I always try to keep at least 5 gallons in the tank as I assume the fuel also acts to keep the fuel pump motor cool. Any validity to this?
    Yep, the gas helps cool the pump. Thats also why the pump is in that plastic bucket. when the pump is running the bucket stays full of fuel keeping the pump submerged, even when the fuel level is low. But even then its a good idea to not run the fuel tank too low, as the less fuel volume there is, the faster that fuel warms up.

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    Senior Member Too Fast's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Not sure how much heat our fuel pumps generate, but I always try to keep at least 5 gallons in the tank as I assume the fuel also acts to keep the fuel pump motor cool. Any validity to this?
    Quote Originally Posted by Mr. Luos View Post
    I do the same.
    Quote Originally Posted by Cutlass View Post
    Yep, the gas helps cool the pump. Thats also why the pump is in that plastic bucket. when the pump is running the bucket stays full of fuel keeping the pump submerged, even when the fuel level is low. But even then its a good idea to not run the fuel tank too low, as the less fuel volume there is, the faster that fuel warms up.
    Yes.

    As Cutlass so eloquently put it.

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    Quote Originally Posted by pajeff02 View Post
    Not sure how much heat our fuel pumps generate, but I always try to keep at least 5 gallons in the tank as I assume the fuel also acts to keep the fuel pump motor cool. Any validity to this?
    I do the same.

  20. #60
    Senior Member Schmalgar's Avatar
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    Speaking of the fuel pump, I have noticed that if I refuel after about a half-tank, I show higher mileage than if I go down to a quarter-tank or further. I have tested this now 4 or 5 times, and I have been showing about 1-1.5mpg more than my normal average.

    I have been wondering if this is related to fuel pump heating issue. Would the pump lose efficiency if it heated up? Do you think I am just bad at math? Has anyone else noticed this?

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