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Old 06-29-2012, 04:40 PM   #1
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head scratcher

So this may sound crazy but it seems to me that my car performs better when I'm low on gas like in the quarter tank range. Is something possibly wrong with the air to fuel ratio when its full or fuel pump possibly? Any one else notice this?
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Old 06-29-2012, 04:48 PM   #2
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Re: head scratcher

Your car runs off of the gasoline fumes and vapors, when your at a quarter tank there is more pressure in the gas tank as well as fumes and vapor which causes your fuel injectors to reciever the gas just a little cleaner.
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Old 06-29-2012, 04:52 PM   #3
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So is there a way to keep that pressure at all times?
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Old 06-29-2012, 05:06 PM   #4
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Re: head scratcher

Octane Booster I use Nos brand which is about 15.00 at your local parts store

---------- Post added at 04:04 PM ---------- Previous post was at 04:03 PM ----------

Make sure you change your oil every 2k miles especially if your running it hard and continually use octane booster!

---------- Post added at 04:06 PM ---------- Previous post was at 04:04 PM ----------

My car takes 5.5 quarts of 5-w30 and one quart of Lucas oil stabilizer, which I use e ery time!
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Old 06-29-2012, 05:07 PM   #5
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I use Royal Purple motor oil change about every 5000 miles, I'm gonna try the octane booster!
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Old 06-29-2012, 05:12 PM   #6
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Re: head scratcher

Also you can usually get a bottle of pure methane from sunoco or your local drag track! Improves performance about 100 points as well as cleans your injectors and just about every part of your fuel system.
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Old 06-29-2012, 05:45 PM   #7
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Re: head scratcher

Quote:
Originally Posted by Infamous View Post
Your car runs off of the gasoline fumes and vapors, when your at a quarter tank there is more pressure in the gas tank as well as fumes and vapor which causes your fuel injectors to reciever the gas just a little cleaner.

I have heard some STUPID **** in my life , but that takes the cake , as they say...
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Old 06-29-2012, 05:49 PM   #8
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Re: head scratcher

Really? So what's your explanation, non ASE certified mechanic... LMAO!
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Old 06-29-2012, 05:56 PM   #9
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Quote:
Originally Posted by Gil_T2

I have heard some STUPID **** in my life , but that takes the cake , as they say...
Can you inform me on it I just really need some advice everyone has different experiences share yours please.
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Old 06-29-2012, 08:35 PM   #10
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Quote:
Originally Posted by Gil_T2

I have heard some STUPID **** in my life , but that takes the cake , as they say...
Lol
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Old 06-30-2012, 11:05 AM   #11
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I always wondered this same thing!!!!! My car is the eact same. It seems like I have so much more power when I'm accelerating at a quarter tank and below
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Old 06-30-2012, 11:11 AM   #12
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Isn't the fuel pulled from the base of the tank? At least that's what I thought...so how could your car run on vapor if it's suckin up the liquid? Granted the injectors make it very fine mist
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Old 06-30-2012, 11:35 AM   #13
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I'm willing to bet that what your feeling is mostly just less weight due to less gas in the system. A tank of gas is about 100 lbs and that makes a difference. I've seen lots of cars which use an octane booster and there may be a little more performance (more timing allowed) but it can be hard on the rubber components of the fuel system. I say find a tank of good gas and be done with it.
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Old 07-01-2012, 02:00 PM   #14
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Quote:
Originally Posted by Infamous
Also you can usually get a bottle of pure methane from sunoco or your local drag track! Improves performance about 100 points as well as cleans your injectors and just about every part of your fuel system.
Friendly correction: It's methanol, not methane.
Methane is an insanely flammable gas and would turn your engine into a grenade if your fuel pump ever decided to suck the vapor into the system. Methane + heat/pressure/direct source of ignition = a bomb

Like DaBlueDude said, most likely you're just feeling a better pull because you car weighs a lot less. That us exactly why no one ever runs more than a quarter tank at the track. It makes a HUGE difference.
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Old 07-01-2012, 05:42 PM   #15
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Quote:
Originally Posted by gqsmash
Isn't the fuel pulled from the base of the tank? At least that's what I thought...so how could your car run on vapor if it's suckin up the liquid? Granted the injectors make it very fine mist
Yes the fuel is pulled from the bottom of the tank and no your car doesn't run on vapors the fuel injectors atomize it into a extremely fine mist not sure where that other guy is gettin his information from
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Old 07-03-2012, 08:28 AM   #16
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Re: head scratcher

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Really? So what's your explanation, non ASE certified mechanic... LMAO!
ASE certification means you can follow directions well enough to get the certification. ONLY thing that makes a good mechanic is experience. All the theory in the world is about as useful as a 10 foot wing on a Honda Civic.

Sure, you need ASE certs to work at most places, but that isn't what makes a good mechanic.

It runs better because it is lighter. No offense, that stuff you spewed is complete and utter crud.

Any data, mechanical or scientific to back this up?
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Old 07-03-2012, 06:45 PM   #17
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Quote:
Originally Posted by Borii

ASE certification means you can follow directions well enough to get the certification. ONLY thing that makes a good mechanic is experience. All the theory in the world is about as useful as a 10 foot wing on a Honda Civic.

Sure, you need ASE certs to work at most places, but that isn't what makes a good mechanic.

It runs better because it is lighter. No offense, that stuff you spewed is complete and utter crud.

Any data, mechanical or scientific to back this up?
Dude's been snortn them fumes.
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Old 07-03-2012, 07:16 PM   #18
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could it be the weight of the gass and the gastank ?
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Old 07-03-2012, 07:25 PM   #19
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To answer the original question it is because your car weighs about 100lb less than with a full tank.

To the person above talking about running with 1/4 tank or less at the track I would advise against it. If you launch hard enough to slosh the fuel away from the fuel pump your car will run lean, possibly causing engine failure.

Quote:
Originally Posted by Infamous
Your car runs off of the gasoline fumes and vapors, when your at a quarter tank there is more pressure in the gas tank as well as fumes and vapor which causes your fuel injectors to reciever the gas just a little
No.
Quote:
Originally Posted by Infamous
Octane Booster I use Nos brand which is about 15.00 at your local parts store

---------- Post added at 04:04 PM ---------- Previous post was at 04:03 PM ----------

Make sure you change your oil every 2k miles especially if your running it hard and continually use octane booster!

---------- Post added at 04:06 PM ---------- Previous post was at 04:04 PM ----------

My car takes 5.5 quarts of 5-w30 and one quart of Lucas oil stabilizer, which I use e ery time!


---------- Post added at 07:24 PM ---------- Previous post was at 07:24 PM ----------


Read that bottle sometime, at most a full bottle will raise your octane rating .01%. I will also advise against oil additives. If ford meant for them to be used they would tell you.
Quote:
Originally Posted by Infamous
Also you can usually get a bottle of pure methane from sunoco or your local drag track! Improves performance about 100 points as well as cleans your injectors and just about every part of your fuel system.
It's on the same aisle as the sailboat fuel...

---------- Post added at 07:25 PM ---------- Previous post was at 07:24 PM ----------

Quote:
Originally Posted by Infamous
Really? So what's your explanation, non ASE certified mechanic... LMAO!
Lol...
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Old 07-03-2012, 08:10 PM   #20
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Read that bottle sometime, at most a full bottle will raise your octane rating .01%. I will also advise against oil additives. If ford meant for them to be used they would tell you.


+1 adding " octane boosters" is doing nothin but basically watering down your fuel waste of money
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