FUEL GAUGE FROM HELL.
#1
FUEL GAUGE FROM HELL.
I have just purchased a WRX sti. My fuel gauge can be seen visible dropping while driving hard over a coulple of miles. The car an 02 sti puts out 339bhp and has the usual basic mods, ie Pump, remap, decat, exhaust etc.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
#3
I have just purchased a WRX sti. My fuel gauge can be seen visible dropping while driving hard over a coulple of miles. The car an 02 sti puts out 339bhp and has the usual basic mods, ie Pump, remap, decat, exhaust etc.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
dnc
#4
I have just purchased a WRX sti. My fuel gauge can be seen visible dropping while driving hard over a coulple of miles. The car an 02 sti puts out 339bhp and has the usual basic mods, ie Pump, remap, decat, exhaust etc.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
Is this normal and what sort of MPG will I be getting with careful and hard driving?
Cheers.
#5
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339bhp and you're complaining about fuel consumption??!! You're in the wrong game!!
I can see my needle move on a hard run and thats in a 260bhp wagon!! What I would give for 340bhp!!
I can see my needle move on a hard run and thats in a 260bhp wagon!! What I would give for 340bhp!!
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#8
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when i had mine re mapped and done up i couldnt belive it ether but got used to it after a few hours i just worry about how to wipe my smile off my face when been out for a run
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#12
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How does your motor make 339bhp?... Seeing as the cc's and rev limit are fixed, then, when at WOT, it has to have bigger 'explosions' to achieve this greater power i.e. more fuel/air added for any given 4-stroke cycle.
Because of the extra air added via the turbo's upped boost - in effect, persuading the engine to be 'bigger' than what it is (depending on the boost level) - then this is the reason why forced induction engines are v. thirsty at WOT (despite, in the case of the Impreza, its relatively small cc's).
Because of the extra air added via the turbo's upped boost - in effect, persuading the engine to be 'bigger' than what it is (depending on the boost level) - then this is the reason why forced induction engines are v. thirsty at WOT (despite, in the case of the Impreza, its relatively small cc's).
Last edited by joz8968; 25 August 2009 at 11:45 AM.
#13
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As said already, don't expect to be able to use 339bhp and get good mpg..
My wrx puts out c350 and averages around 22 with mixed urban driving and no doubt if I drive harder more often it would be less ~18. however on a recent family holiday to the north Yorkshire Moors (600 miles) I drove 99% off boost and was astonished to return nearly 32mpg..! I'd have never believed it if it hadn't done it myself..!
It's all down to how heavy your right foot is. A boost gauge provides an excellent guide when you need to keep things economical..
My wrx puts out c350 and averages around 22 with mixed urban driving and no doubt if I drive harder more often it would be less ~18. however on a recent family holiday to the north Yorkshire Moors (600 miles) I drove 99% off boost and was astonished to return nearly 32mpg..! I'd have never believed it if it hadn't done it myself..!
It's all down to how heavy your right foot is. A boost gauge provides an excellent guide when you need to keep things economical..
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400 bhp on track = 6 mpg....
Average road use sees 22 mpg, down to 14 mpg on a "club run"....
ENJOY !
dunx
P.S. At 2 bar of boost you are running a six litre engine ! ! !
Average road use sees 22 mpg, down to 14 mpg on a "club run"....
ENJOY !
dunx
P.S. At 2 bar of boost you are running a six litre engine ! ! !
#16
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That's right!
So in dunx's example above...
3bar in total.... 1 bar of air pressure is what a normal N/A engine would ingest (so a F.I. engine would also get that 'for free' anyway)... But the remaining added 2 bar provided by the turbo is therefore equivalent to having another 2 Impreza engines' worth of capacity... so 1994cc x 3! (just under 6 litres).
So in dunx's example above...
3bar in total.... 1 bar of air pressure is what a normal N/A engine would ingest (so a F.I. engine would also get that 'for free' anyway)... But the remaining added 2 bar provided by the turbo is therefore equivalent to having another 2 Impreza engines' worth of capacity... so 1994cc x 3! (just under 6 litres).
Last edited by joz8968; 25 August 2009 at 01:56 PM.
#17
That's right!
So in dunx's example above...
3bar in total.... 1 bar of air pressure is what a normal N/A engine would ingest (so a F.I. engine would also get that 'for free' anyway)... But the remaining added 2 bar provided by the turbo is therefore equivalent to having another 2 Impreza engines' worth of capacity... so 1994cc x 3! (just under 6 litres).
So in dunx's example above...
3bar in total.... 1 bar of air pressure is what a normal N/A engine would ingest (so a F.I. engine would also get that 'for free' anyway)... But the remaining added 2 bar provided by the turbo is therefore equivalent to having another 2 Impreza engines' worth of capacity... so 1994cc x 3! (just under 6 litres).
I've got a standard(ish) V4 sti and average between 25-28 mpg, but I did get 33 mpg on recent long motorway trip which surprised me a lot. If driven enthusiastically it does drink a lot more tho - all about smiles per gallon after all
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