sound dumb, but what if someone built a motor for...

carbed87

Member

Jun 5, 2005

215

0

16

Jun 15, 2006

#1

• Jun 15, 2006

• #1

gas milage! like mabey a motor with like 250hp, but with like 30mpg.

is this possible, could doing things like port the heads, but just enough to free restriction of airflow, and freeing up the exaust just enough to get the air moving better actually end up helping the gas milage.

i guess the point would be to free the motor of restriction, while being careful not to cross the line to where it trades it's gas milage potential to performance.

im not trying to sound stupid or anything, but wouldn't it be cool to have a rather modest 13 second car that at the same time gets like 30+

let me know what you think of this.

 

poneypower89

Now everyone in the world will know I wanna bang t

Dec 6, 2004

0

3

28

Indianapolis, Indiana

Jun 15, 2006

#2

• Jun 15, 2006

• #2

yea, most mid-level performance imports already do that.

 

carbed87

Member

Jun 5, 2005

215

0

16

Jun 15, 2006

#3

• Jun 15, 2006

• #3

ouch, i can see where this is going... better put my flamesuit on.

 

poneypower89

Now everyone in the world will know I wanna bang t

Dec 6, 2004

0

3

28

Indianapolis, Indiana

Jun 15, 2006

#4

• Jun 15, 2006

• #4

yep... sorry bro... sometimes you just walk into to situations like this.

 

MyBad70

Where's my Member?

Jan 30, 2006

0

0

0

Huntsville, AL

Jun 15, 2006

#5

• Jun 15, 2006

• #5

:damnit:

 

Aliate X

Member

May 9, 2005

602

1

18

Rockland NY

Jun 15, 2006

#6

• Jun 15, 2006

• #6

Honestly, if you want gas milage and power you shouldnt look towards a V8, smaller forced induction motors do this much better than V8's like STi's

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Jun 15, 2006

#7

• Jun 15, 2006

• #7

yeah, its called building a motor with better volumetric efficiency....it just so happens that when you build a motor to be more effecient it also makes more power.

 

Aliate X

Member

May 9, 2005

602

1

18

Rockland NY

Jun 15, 2006

#8

• Jun 15, 2006

• #8

dragnazz5.0 said:

yeah, its called building a motor with better volumetric efficiency....it just so happens that when you build a motor to be more effecient it also makes more power.

Click to expand...

More power = more air and more fuel. More fuel is less gas milage.

You cant have something for nothing.

On the other hand, after my h/c/i swap, my gas milage hasnt changed much but the car is a whole new animal.

 

CRASH7772

Member

Apr 27, 2003

401

1

16

NH

Jun 15, 2006

#9

• Jun 15, 2006

• #9

Stock 5 speed 87-93 5.0's (notchbacks and SD stangs would be best) get close to 30MPG highway and run low to mid 14's when healthy. If you lighten it up, keep the 2.73's and free up some HP with pullies, exhaust, and filter with a good dyno tune I don't see why you couldn't dip into the 13's with a good pass and get close to if not 30MPG with it. If you have the low end torque to pull the gear this will net some good ET's with 2.73's and keep good fuel mileage. I was running low 14's and getting 24-27 for MPG on a tank of all around driving prior to me messing with the gears and engine witout a dyno tune.

I have gotten 31 MPG with my 220HP Mazda 6 and that's a higher reving 6cyl which has no balls down low IMO.

 

Aaron

20+ Year Stangneter

Dec 5, 2003

95

40

38

Buffalo, NY

Jun 15, 2006

#10

• Jun 15, 2006

• #10

View attachment 462461

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Jun 15, 2006

#11

• Jun 15, 2006

• #11

My car makes 260hp at the wheels (probably a bit more now since I've done some garage tuning) and I consistently get between 21 and 25mpg. Not bad if you ask me.

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Jun 15, 2006

#12

• Jun 15, 2006

• #12

Aliate X said:

More power = more air and more fuel. More fuel is less gas milage.

You cant have something for nothing.

On the other hand, after my h/c/i swap, my gas milage hasnt changed much but the car is a whole new animal.

Click to expand...

i wasnt necessarily saying build the car to make more power and you get better gas mileage. i was saying that the gas mileage and effeciency of a motor depend entirely on its capability to change heat into motion (thermal efficiency). most engines run at about 30% thermal efficiency. the volumetric efficiency i was talking about has a lot to do with thermal efficiency. you cannot build a gasoline engine that runs at 100% efficiency...its impossible. but the closer you get to 100% the better the gas mileage and you just happened to be making more power.

i know what youre saying that more power equals more fuel and air...which is true. but if you take a motor that can run at 60% efficiency and a motor that can only run a 30% efficiency than the previous motor will get better mileage and make more power simply because it is converting more heat into more mechanical motion (power).

 

ryan218

In just 10 years, I'll be old enough to drive!!!!

Dec 28, 2005

0

1

38

columbus ohio

Jun 15, 2006

#13

• Jun 15, 2006

• #13

no in the 5.0 magazine there is a fox in there that has 800hp and 20MPG

 

bryce93lx

Member

Jan 20, 2006

88

1

19

Luke AFB AZ

Jun 15, 2006

#14

• Jun 15, 2006

• #14

You can check to see how much gas it burns??? i always figured it just burned all i put it, if you want to go fast an get good mileage buy a motorcycle

 

carbed87

Member

Jun 5, 2005

215

0

16

Jun 16, 2006

#15

• Jun 16, 2006

• #15

lol, i wasn't going to do it, just a stupid idea i had. sorry

 

poneypower89

Now everyone in the world will know I wanna bang t

Dec 6, 2004

0

3

28

Indianapolis, Indiana

Jun 16, 2006

#16

• Jun 16, 2006

• #16

well.. to help you our from get'n too flamed here...

An american company far exceeds your wish list here...


Yep.. the NEW zo6 corvette.. 500+ hp and 30 mpg on the HWY.. and this is with a PUSHROD

Oh yea, think I read somewhere they run something in the 11's as far the 1/4 mile