Maximmum Efficiency
Thread Starter
Burning Brakes
Joined: Oct 2000
Posts: 918
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Maximmum Efficiency
what speed and rpm should we drive at to get the best gas millege? for 99 and 00 tl's.
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Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
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Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
Three Wheelin'
Joined: Jul 2000
Posts: 1,505
Likes: 0
From: South Florida
By definition, it'd be the lowest speed at which the torque converter is fully locked up in the highest gear. On my 2000 that's around 55MPH in 5th.
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2000 WDP 3.2TL non-NAV
AEM CAI w/bypass, Comptech header
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2000 WDP 3.2TL non-NAV
AEM CAI w/bypass, Comptech header
Thread Starter
Burning Brakes
Joined: Oct 2000
Posts: 918
Likes: 0
can anyone else help out? so a 99 would be a lower speed? this means we waste gas after 55 mph?
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Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
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Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
Guest
Posts: n/a
Compared to everything else happening as you drive your car, the thermodynamic efficiency of the engine is relatively flat.
With that in mind, realize that the sum of the various types of friction in your drivetrain, tires, and aerodynamics... is approximately increased with the square of speed (actually, the exponent would be less than 2). This means that the speed at which you travel has the greatest influence on the car's overall efficiency. For instance, driving 70 MPH instead of 50 MPH doubles the aerodynamic friction your car experiences. This doesn't mean that your car gets half the gas mileage, though... it's more complicated than that.
Plus thermodynamic efficiency is measured at a greater engine demand (throttle position) than you use to cruise. The higher the demand on the engine, the higher the efficiency. I believe 85% load is the approprate figure. So driving in the highest gear possible increases the relative load on the engine. Unfortunately on automatic cars with fuzzy logic, the computer decides to shift down or drop out the torque converter if you keep a gear too low.
And driving is a dynamic event. For best overall efficiency you need to conserve energy at all time. This means lifting off the throttle earlier so you don't waste energy as brake heat. This means letting your car gain speed down hills and losing speed up hills. Etc, etc.
One time got 34 MPG out of the TL by driving 55-60 MPH and using cruise control on flat highway, my energy efficient driving technique on hills.
Because a sedan is relatively aerodynamic, you can usually drive 65-75 MPH and still get good gas mileage. But in a SUV, which has a large frontal area, the increase in speed makes a huge slurping sound as a whirlpool forms at the bottom of the gas tank
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Had 2000 3.2TL... Got bored with a big car.
Now I have:
2001 Civic EX Coupe, Black, Auto... wife uses mostly. Getting 36 MPG overall.
1999 CR-V EX 4WD Auto White... bad weather car, hauls stuff including bicycle.
1992 MR-2 5-Speed T-Tops 2.2L, Greddy SP S/S Exhaust... sunny-day car.
Next up: MR2 gets sacrificed to make garage
space for a Yellow S2000!!!!
With that in mind, realize that the sum of the various types of friction in your drivetrain, tires, and aerodynamics... is approximately increased with the square of speed (actually, the exponent would be less than 2). This means that the speed at which you travel has the greatest influence on the car's overall efficiency. For instance, driving 70 MPH instead of 50 MPH doubles the aerodynamic friction your car experiences. This doesn't mean that your car gets half the gas mileage, though... it's more complicated than that.
Plus thermodynamic efficiency is measured at a greater engine demand (throttle position) than you use to cruise. The higher the demand on the engine, the higher the efficiency. I believe 85% load is the approprate figure. So driving in the highest gear possible increases the relative load on the engine. Unfortunately on automatic cars with fuzzy logic, the computer decides to shift down or drop out the torque converter if you keep a gear too low.
And driving is a dynamic event. For best overall efficiency you need to conserve energy at all time. This means lifting off the throttle earlier so you don't waste energy as brake heat. This means letting your car gain speed down hills and losing speed up hills. Etc, etc.
One time got 34 MPG out of the TL by driving 55-60 MPH and using cruise control on flat highway, my energy efficient driving technique on hills.
Because a sedan is relatively aerodynamic, you can usually drive 65-75 MPH and still get good gas mileage. But in a SUV, which has a large frontal area, the increase in speed makes a huge slurping sound as a whirlpool forms at the bottom of the gas tank
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Had 2000 3.2TL... Got bored with a big car.
Now I have:
2001 Civic EX Coupe, Black, Auto... wife uses mostly. Getting 36 MPG overall.
1999 CR-V EX 4WD Auto White... bad weather car, hauls stuff including bicycle.
1992 MR-2 5-Speed T-Tops 2.2L, Greddy SP S/S Exhaust... sunny-day car.
Next up: MR2 gets sacrificed to make garage
space for a Yellow S2000!!!!
Three Wheelin'
Joined: Dec 2000
Posts: 1,444
Likes: 0
From: Nothern VA
Originally posted by Danny with a silver stock:
Thats what I was going to say...
Thats what I was going to say...
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Senior Moderator
Joined: May 2000
Posts: 17,085
Likes: 740
From: Brooklyn, NY USA
Just shut up and drive!
Ed
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Acura-TL.com - Forum Moderator
'66 Mustang Fastback
'99 Mazda Miata
'99 Acura TL Satin Silver/Ebony, Non/Nav, Comptech Springs and Sways, CL Type S wheels wrapped with 225/45/17 Dunlop SP9000's, Comptech Air Filter Element, Inspire Tails, AEM Brake Pads all around, Comptech Axle Back Exhaust, Gutter Guard Grille, "Guy Smiley" doll on the dash as my Co-driver...
Pics of my TL
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Ed
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Acura-TL.com - Forum Moderator
'66 Mustang Fastback
'99 Mazda Miata
'99 Acura TL Satin Silver/Ebony, Non/Nav, Comptech Springs and Sways, CL Type S wheels wrapped with 225/45/17 Dunlop SP9000's, Comptech Air Filter Element, Inspire Tails, AEM Brake Pads all around, Comptech Axle Back Exhaust, Gutter Guard Grille, "Guy Smiley" doll on the dash as my Co-driver...
Pics of my TL
Pics of my Miata! Wadya think?
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Guest
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Originally posted by Einstein:
Compared to everything else happening as you drive your car, the thermodynamic efficiency of the engine is relatively flat.
With that in mind, realize that the sum of the various types of friction in your drivetrain, tires, and aerodynamics... is approximately increased with the square of speed (actually, the exponent would be less than 2). This means that the speed at which you travel has the greatest influence on the car's overall efficiency. For instance, driving 70 MPH instead of 50 MPH doubles the aerodynamic friction your car experiences. This doesn't mean that your car gets half the gas mileage, though... it's more complicated than that.
Plus thermodynamic efficiency is measured at a greater engine demand (throttle position) than you use to cruise. The higher the demand on the engine, the higher the efficiency. I believe 85% load is the approprate figure. So driving in the highest gear possible increases the relative load on the engine. Unfortunately on automatic cars with fuzzy logic, the computer decides to shift down or drop out the torque converter if you keep a gear too low.
And driving is a dynamic event. For best overall efficiency you need to conserve energy at all time. This means lifting off the throttle earlier so you don't waste energy as brake heat. This means letting your car gain speed down hills and losing speed up hills. Etc, etc.
One time got 34 MPG out of the TL by driving 55-60 MPH and using cruise control on flat highway, my energy efficient driving technique on hills.
Because a sedan is relatively aerodynamic, you can usually drive 65-75 MPH and still get good gas mileage. But in a SUV, which has a large frontal area, the increase in speed makes a huge slurping sound as a whirlpool forms at the bottom of the gas tank
Compared to everything else happening as you drive your car, the thermodynamic efficiency of the engine is relatively flat.
With that in mind, realize that the sum of the various types of friction in your drivetrain, tires, and aerodynamics... is approximately increased with the square of speed (actually, the exponent would be less than 2). This means that the speed at which you travel has the greatest influence on the car's overall efficiency. For instance, driving 70 MPH instead of 50 MPH doubles the aerodynamic friction your car experiences. This doesn't mean that your car gets half the gas mileage, though... it's more complicated than that.
Plus thermodynamic efficiency is measured at a greater engine demand (throttle position) than you use to cruise. The higher the demand on the engine, the higher the efficiency. I believe 85% load is the approprate figure. So driving in the highest gear possible increases the relative load on the engine. Unfortunately on automatic cars with fuzzy logic, the computer decides to shift down or drop out the torque converter if you keep a gear too low.
And driving is a dynamic event. For best overall efficiency you need to conserve energy at all time. This means lifting off the throttle earlier so you don't waste energy as brake heat. This means letting your car gain speed down hills and losing speed up hills. Etc, etc.
One time got 34 MPG out of the TL by driving 55-60 MPH and using cruise control on flat highway, my energy efficient driving technique on hills.
Because a sedan is relatively aerodynamic, you can usually drive 65-75 MPH and still get good gas mileage. But in a SUV, which has a large frontal area, the increase in speed makes a huge slurping sound as a whirlpool forms at the bottom of the gas tank
Thread Starter
Burning Brakes
Joined: Oct 2000
Posts: 918
Likes: 0
worthless people...
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Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
------------------
Some Said, "TL Type S," Soon They Will Say, "Wannabe TL-S." Laguna METALLIC, Navi, Side Cuts, Tint All Around, Interior Footwell Lighting, Eibach ProKit, PIAA 1700x Fogs custom cut into side holes, Akimoto Intake, Inspire Tails, 17" Type-S Rims with 215/45/17 Bridgestone Potenza RE730's, Visor, Wood Shifter, Comptech Sways making me ride on rails...
http://albums.photopoint.com/j/Album...026&Auth=false
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