Turbo power vs mpg

[RichieRocket]

Sorry to inform you, but it's not linear, period.
Gears are linear, sure, that's a given.
Engines are *not* linear and they are part of that equation.
What it would take to be able to achieve those numbers would blow your mind, or your motor.

Please, show me the dyno sheet that disproves that fact, I'd love to see it.

CoHPhasor, wow, I think you are misunderstanding the chart I made! No where does anyone say the car can actually go 217 mph
It's a theoretical chart, so yes it is linear...
If I recall correctly, someone said the actual top speed was 124 mph, with stock tune, power limited.

If you read my original post for that chart, I jokingly say you would need 800 horsepower to go 217 mph Please do not quote me on the 800 horsepower, that is only a guesstimate!

The chart you are thinking of is 'driving force' versus 'road speed' so it has 6 lines, one for each gear ratio. If you know drag (aero & mech) versus speed, you can draw in that curve also. Where they cross is your top speed. I don't have drag info.
Here are the plots I created:
http://www.sonicownersforum.com/forum/t655/
All the info and assumptions are described in the post. Check them out...

 

[gsxr1000]

If you read my original post for that chart, I jokingly say you would need 800 horsepower to go 217 mph Please do not quote me on the 800 horsepower, that is only a guesstimate! ..

Lets do it .... i will test drive it lmao

 

[Chevrolet Customer Care]

i'm absolutely loving the mpg of my 1.4L. I filled up this morning, reset my DIC and drove to work. here's what it was telling me. out of town i have a stretch of 60mph then goto I-80 where its 75mph, to I-215 which is 65mph, to Legacy Parkway which is 55mph and finally I-15 and 65mph until i get to the offramp and do around 40mph.

sorry for this bad picture, but if you look at my Ultra-Guage it will tell just how much boost i usually do around 55mph

Great to hear you're enjoying your Sonic! Please keep everyone updated on your experiences. Enjoy the weekend!

Matt (Assisting Vanessa)

GM Customer Service

 

[CoHPhasor]

If you read my original post for that chart, I jokingly say you would need 800 horsepower to go 217 mph Please do not quote me on the 800 horsepower, that is only a guesstimate!

Didn't see that, definitely dives to the heart of what I was getting at, lol!
Sorry about that.

 

[MCa23]

For these tunes some of you are talking about... are they cost efficient? Meaning, do the gains in mpg out weight the cost of getting to tune. If the tune is of significant cost how long would it take for it to balance out and actually give you an advantage of saved money from improved mpg?

 

[SSpeckerwood]

All depends on your foot. Mine paid for itself in 2 months

 

[MCa23]

How much do tunes typically cost and where can I find one for the 1.8L?

 

[SSpeckerwood]

Goto the vendor on this forum called BNRacing.

Check out there website