Fuel consumption 05 sti ppp???
06 December 2004, 10:03 AM
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Fuel consumption 05 sti ppp???
I have one of the above and I am getting 200 miles to a tank...this is far worse than my EVO ever was!!! It has done about 2,500 miles, and I drive it exactley the same as the evo
Surely I should be getting more than this???
Surely I should be getting more than this???
06 December 2004, 10:35 AM
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Strewth! I've been getting about 22mpg out of my JDM car and that's bad enough.
170 miles out of 50 litres is about 15mpg. That's pretty shocking, even for an Impreza.
On my old MY00 with PPP I used to get about 25-26mpg.
170 miles out of 50 litres is about 15mpg. That's pretty shocking, even for an Impreza.
On my old MY00 with PPP I used to get about 25-26mpg.
06 December 2004, 10:42 AM
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Originally Posted by AndyC_772
Strewth! I've been getting about 22mpg out of my JDM car and that's bad enough.
170 miles out of 50 litres is about 15mpg. That's pretty shocking, even for an Impreza.
On my old MY00 with PPP I used to get about 25-26mpg.
170 miles out of 50 litres is about 15mpg. That's pretty shocking, even for an Impreza.
On my old MY00 with PPP I used to get about 25-26mpg.
On a run i can get about 24mpg
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06 December 2004, 10:59 AM
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I guess it's easy to forget that a litre of petrol only contains so much useful energy; mash the pedal into the carpet and all that power comes from burning more fuel in a shorter space of time. Acceleration and economy are mutually exclusive.
Shame that some of the more interesting developments in engine technology haven't yet reached commercial viability - prototypes exist with variable compression ratio, variable displacement and radically altered geometry, all of which have dramatic effects on both power and economy but which, for one reason or another, just aren't commercially viable. Yet.
Shame that some of the more interesting developments in engine technology haven't yet reached commercial viability - prototypes exist with variable compression ratio, variable displacement and radically altered geometry, all of which have dramatic effects on both power and economy but which, for one reason or another, just aren't commercially viable. Yet.
06 December 2004, 11:05 AM
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Originally Posted by Ex_Pug
I could get 26-27mpg on a run-in 03 STi with PPP down the motorway. Normal town driving was about 18-19mpg. Even when new, it was never much less than that.
Its not me - I can get nearly 40 mpg from tuned 306 GTi-6 (200bhp)..
06 December 2004, 11:59 AM
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I'm getting 250 a tank on my MY03 STi PPP - mostly motorway work at (cough) 90mph.
It has got better over time (40k miles now). Interestingly enough, the Prodrive springs seem to have improved it - but that might be me watching my tyre pressures more closely, or the weather getting colder.
PM me if you're interested enough in this to want a copy of my spreadsheet showing MPG over time.
It has got better over time (40k miles now). Interestingly enough, the Prodrive springs seem to have improved it - but that might be me watching my tyre pressures more closely, or the weather getting colder.
PM me if you're interested enough in this to want a copy of my spreadsheet showing MPG over time.
06 December 2004, 12:30 PM
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Originally Posted by ThrustSSC
I'm getting 250 a tank on my MY03 STi PPP - mostly motorway work at (cough) 90mph.
It has got better over time (40k miles now). Interestingly enough, the Prodrive springs seem to have improved it - but that might be me watching my tyre pressures more closely, or the weather getting colder.
PM me if you're interested enough in this to want a copy of my spreadsheet showing MPG over time.
It has got better over time (40k miles now). Interestingly enough, the Prodrive springs seem to have improved it - but that might be me watching my tyre pressures more closely, or the weather getting colder.
PM me if you're interested enough in this to want a copy of my spreadsheet showing MPG over time.
06 December 2004, 04:06 PM
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AndyC,
Yes, it is true that the technology exists for all these hair-raising futuristic prospects, but you have to understand that it takes a long time from when the technology becomes a possibility to when it becomes a reality. Variable compression engines are remarkable and so is direct injection intake. These technologies however need to be tested and developed because after all is said and done, a company needs to radically change it's manufacturing and take a lot of risks to develop such ground-shaking tech, risking a lot in the process. You only need to look at Mazda's RX8, it might look great and as far as wankel engines are concerned it is amazing, but forums are riddled with complaints about it's reliabilities and quirks. I know for a fact that Ford spend around 2-3 thousand hours of dyno-time to test all variations of their engines. You wouldn't believe it, but that 1.4 fiesta has the equivalent of 170 full days of dyno-testing, and thats just for the engine!
Heaven forbid you sold a car with less than 2 years guarantee! even if it was a cut-throat price... Stay tuned though, we'll see both vari-comp engines and direct petrol injection pretty soon at a car near you!
By the way, this is my first post if you didn't already notice! Thanks for reading!
-Antonis
Yes, it is true that the technology exists for all these hair-raising futuristic prospects, but you have to understand that it takes a long time from when the technology becomes a possibility to when it becomes a reality. Variable compression engines are remarkable and so is direct injection intake. These technologies however need to be tested and developed because after all is said and done, a company needs to radically change it's manufacturing and take a lot of risks to develop such ground-shaking tech, risking a lot in the process. You only need to look at Mazda's RX8, it might look great and as far as wankel engines are concerned it is amazing, but forums are riddled with complaints about it's reliabilities and quirks. I know for a fact that Ford spend around 2-3 thousand hours of dyno-time to test all variations of their engines. You wouldn't believe it, but that 1.4 fiesta has the equivalent of 170 full days of dyno-testing, and thats just for the engine!
Heaven forbid you sold a car with less than 2 years guarantee! even if it was a cut-throat price... Stay tuned though, we'll see both vari-comp engines and direct petrol injection pretty soon at a car near you!
By the way, this is my first post if you didn't already notice! Thanks for reading!
-Antonis
Last edited by Engineer@Uni; 06 December 2004 at 04:09 PM.
06 December 2004, 04:20 PM
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Originally Posted by George W Bush
Thats the extra weight of the dark seats Aaron..fancy a swap for some lovely blue ones??
06 December 2004, 04:26 PM
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Hello and welcome to the board 
I'm well aware of the amount of R&D that goes into any mass-produced, complex product - I'm a design engineer by trade myself
The internal combustion engine has reached an extraordinarily high level of advancement through years of development, and to date, there's nothing out there to threaten its dominance. Conventional engines have such a head start over the more radically advanced prototypes (such as Lotus' active valve design or the Mayflower variable-displacement unit) that it's no surprise these new ideas are struggling to meet the competition. Economy and power are no use without low cost, refinement and reliability - nobody will buy them.
That's not to say they're not coming, though - I wholeheartedly look forward to an engine with scooby power that does 50mpg (heck, 30mpg would be nice!!), but I'm not holding my breath
I'm well aware of the amount of R&D that goes into any mass-produced, complex product - I'm a design engineer by trade myself
The internal combustion engine has reached an extraordinarily high level of advancement through years of development, and to date, there's nothing out there to threaten its dominance. Conventional engines have such a head start over the more radically advanced prototypes (such as Lotus' active valve design or the Mayflower variable-displacement unit) that it's no surprise these new ideas are struggling to meet the competition. Economy and power are no use without low cost, refinement and reliability - nobody will buy them.
That's not to say they're not coming, though - I wholeheartedly look forward to an engine with scooby power that does 50mpg (heck, 30mpg would be nice!!), but I'm not holding my breath
06 December 2004, 04:39 PM
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Wow thanks AndyC! I never knew you were an engineer too. The mayflower variable displacement really was a hell of an invention. I honestly hope we get to see them in our lifetimes! Imagine that, they quoted frictional losses down by 13% on the prototype. Couple that to direct fuel injection (BMW quoted 13% efficiency and 11% power up on their new direct injection 3-series) and we're looking at quite a bit off bang-for-buck, n'est pas?
-- Edited by tiggers --
But until then, and until pigs fly, we'll all be stuck with 20mpg!
-Antonis
-- Edited by tiggers --
But until then, and until pigs fly, we'll all be stuck with 20mpg!
-Antonis
Last edited by tiggers; 06 December 2004 at 05:56 PM. Reason: Removed potentially troublesome comments!
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