Subaru Impreza 1.6i - Tips to Increase FC

[Esvtec]

Bro,

I might be wrong, but isn't 'Neutral' gear to be free wheeling and even if you are AWD, it is the same as 2WD free wheeling???

Anyway, nothing wrong with Neutral gear, just that do remember when either of ur tyre run over 'oil' on the road and result it spin fater than another tyres, ur vehicle will oversteer..

So plz beware ur driving with Neutral!!!

[Gim_ong]

You got a point,

 

I have found out something, in my experiment.

 

 

My TS drink more when I enter Low gear.

 

Now I trying to Change Gear @ 2200 rpm

 

So that After I change gear immediately it drop to 1900 rpm.

 

Trying to Explore and try to get the optimum.

 

Thanks for all the advices Thus far

 

Thank You

 

Cheers

 

Gimmy

[Scaglietti]

When I looked that the thread title..."Tips to increase FC"... I thought... isn't it easy... rev all you can... fuel consumption sure increase one...

 

BTW... just curious... you are trying to reduce FC for saving $$$ or for the kick of it.

 

I think you could have spend more $$$ than you save via fuel-saving. You might incur more cost later, cos keeping engines at low-revs is a sure way of carbon build-up. My friend got to overhaul his engines due to carbon build-up because he never rev pas 2500rpm. He decided to scrap the car instead.

 

Is yours a AT? You may also wear the transmission if you switch between D and N too often... if its a MT... then it's not so bad. BTW, when going down hill, if you release the accelarator pedal, the momentum keeps the car engine going, some ECU actually cuts of fuel to the engine. But if you are in neutral, the engine have to run on petrol to keep it idling... so you might not save petrol in this way.

 

Good luck to you...

 

BC

Edited July 11, 2007 by Scaglietti

[Osiris]

In auto car, there's no engine brake

 

i am a bit confuse here. Auto car do have engine brake.

[Paul123]

"1) I have installed EZ-stab EXTreme. I have just Spend $620 on this Extreme. Very worth it

It aids in Power and Fuel Efficiency "

 

 

Is this not a little to much? I mean 620$ ... is this valuable?

[En0203]

Free-wheeling is dangerous especially during hard-braking. Enough said.

 

ok lar, i only see that as dangerous for racer. anyway, u all always rite because most ppl here are racers

 

food for thought:-

1) for manual driver:-

during emergency braking, i wonder how many have the reaction to downshift quickly to make use of that engine braking? maybe i am clumsy, even with more than 10 yrs of driving experience i don't have enough time to downshift for engine braking during an emergency braking, though i am used to heel-toe downshifting before corners, can only blame myself for my lousy driving skill

 

2) for auto driver:-

during hard braking, i wonder how many cars' ECU will be clever enough to downshift to provide engine braking in normal driving mode? that doesn't happen on my car, rpm stays around 1k until my car stops totally

 

just something to think. no puns intended. cheers

[En0203]

You are giving a rather wrong signal here. In auto car, there's no engine brake, thus the safe manner of driving is to apply brake before entering bend/corner... I'm sure your many years of driving will tell you that corner at high speed without any form of brake will only result in some nasty situation if the car cannot hold well.

 

Moreover, there's a difference between free wheeling and having your car in gear. If you are in gear, when the driver sense that the car is losing grip, he can do corrective action by adding torque and not jamming the brake. If it's on freewheel, what do you think an inexperience driver will do?

 

You need to differentiate between freewheel and in gear as well.

 

BTW, the above don't apply to gentle driver.

 

actually that's exactly my point, apply brake before corner and it doesn't matter whether u are in free gear or not throughout the corner it makes no difference because theoretically whether or not i am in free gear or i am in auto i still gain nothing from the gearbox throughout the corner. the speed should be corrected before the corner and not during the cornering itself, that's too dangerous for a normal driver.

 

as for ur 2nd statement, corrective action by applying torque when the car loose grip only applies to oversteer by RWD. most of the cars here are front weight biased and i would say 90% of the time inexperience driver only lose grip to understeer due to entering corner too fast with their FWD, and the only corrective action for that is to ease off the accelerator, applying torque will not help at all

 

anyway, hope u guys don't get me wrong. i am not encouraging ppl to do free-wheeling, it's just that free-wheeling happens to be an everyday-business for most of the autocars. if one drives a manual car, it's always a good practice to engage a lower gear before the corner

Edited July 11, 2007 by En0203

[En0203]

hi bro do u still drive sunny?

 

sunny does provide engine braking when u off the OD

 

but in normal mode, the engine brake is negligible, as good as no engine brake

Edited July 11, 2007 by En0203

[Friendstar]

en0203,

i believe that most guys here got u wrong. so just spread the safer message, that is, engage gear when cornering and not "oh u know huh, many people actually free wheel during cornering cos they'r driving auto, so it doesnt really matter LAH"

[Friendstar]

When I looked that the thread title..."Tips to increase FC"... I thought... isn't it easy... rev all you can... fuel consumption sure increase one...

 

BTW... just curious... you are trying to reduce FC for saving $$$ or for the kick of it.

 

I think you could have spend more $$$ than you save via fuel-saving. You might incur more cost later, cos keeping engines at low-revs is a sure way of carbon build-up. My friend got to overhaul his engines due to carbon build-up because he never rev pas 2500rpm. He decided to scrap the car instead.

 

Is yours a AT? You may also wear the transmission if you switch between D and N too often... if its a MT... then it's not so bad. BTW, when going down hill, if you release the accelarator pedal, the momentum keeps the car engine going, some ECU actually cuts of fuel to the engine. But if you are in neutral, the engine have to run on petrol to keep it idling... so you might not save petrol in this way.

 

Good luck to you...

 

BC

 

 

I like ur reply man!!!! it sounded like the TS has just banged his balls

[En0203]

sorry my bad

[Osiris]

ya i still do. that's what I am talking about. can drop to 1(L) or 2 too

[Sony]

In auto car, there's no engine brake

 

i am a bit confuse here. Auto car do have engine brake.

 

sorrie to add to the confusion. I was half asleep with that reply. Technically there's engine brake but as the gear usually do not drop until the rev or speed drop too low, thus essentially, the potential of engine brake is not felt or doesn't kick in.

[Vit4wd]

For engine brake to be really effective in an auto car, you need to manually downshift the gears, to for example, '2'

[Thermodynamics]

YA, to test whether that THING really works or not is to drive like normal but not go to extremes to save fuel.... it makes me wonder whether that THING really works or not....

[Boyboy]

[reply

i dun know what to say.. but changing gear at 1.5k rpm.. is seriously lugging ur engine, be prepared for engine damage in the future...

 

[reply]

 

not at all true. depends on the load. i can be changing gear at 1.5k in HDB heartlands at minimal throttle cos the vehicles in front of me are so slow.

 

in fact, can change at 1.5k and floor gas pedal. read somewhere abt this method to save fuel. though i seldom use it.

 

what will be a problem, is driving up the NTU slope near bioscience without downshifting, until engine starts lugging. then i agree with what u say

[Boyboy]

if u hit 5th gear at 60-65km/h yr engine would be straining to reach 90km/h...

even when u enter 5th gear at 50km/h also can ... start from stand-still in 2nd also can... but u'll juz not be optimising the gears with respect to the speed of the car or gradient of the road....

 

 

p.s. basic theory book got sae NEVER DO FREE WHEELING (ie put to neutral)...

 

actually if u enter the bend fast and dip the clutch fast enough and turn... u can do a drift...

 

freewheeling on the straights is fine. just be alert and ready to clutch in shd u need power. i can think of MANY more dangerous stuff than that, some of which i'm guilty of. e.g. using hp when driving (even with handsfree)

 

my car can comfortably change to 5th at just 50km/h. dun generalize, unless u know the gear ratio for TS (i don't). if i want, can change to 5th at 40, on flat roads, still no strain. of course throttle press very gently and make sure that no one behind me

[Boyboy]

yea he's just trying to share tips to achieve good fc, in a polite manner somemore, but why so many ppl shoot him

 

herd mentality. typical of most pple, particularly citizens of our nation

 

even the free-wheeling issue.. auto cars have practically no engine braking to speak of at normal cruising speeds. so all auto cars are freewheeling, unless u purposely downshift (and make the transmission up lorry faster). so auto cars dangerous?

 

personally, i dun support freewheeling all the time, for FC reasons. but it isn't as dangerous as driving school paints it to be