My FC Getting Better With Low RPM

[iagree]

Braking waste petrol because the distance you can travel with a litre of petrol is reduced since u brake. Energy is lost as heat because you brake mah. Thats why braking increases your fuel consumption.

hi SoL,

iagree with u loh.
lousier FC loh if so.

regards.

[LatioR]

In msia I think around 260 or 270 is ok bah. If not NSH but those kinda bumpy roads, reduce even more. Not very sure about this, you might want to ask those bros who frequent Msia.

i'm frequently to malaysia but not like u at very high pressure mah (believed not many ppl like u)

[Ying]

you feel nothing when you drive for short distance. Try driving to Ipoh with high pressure, those in the car especially back seat will feel very uncomfortable and very tiring.

[LatioR]

hi ying, wat's yr tyre pressure in Sg and while travel to malaysia? My at 250 and 235 now and intend to try this pressure at malaysia too. Will take small step to increase the tyre pressure to 260~270 later on in Sg.

Hi anyone know abt the spare tyre pressure, notice something written on tyre like "inflat to 420kpa or 60psi" yesterday night. Not sure if it's correct or not? Decided to top up to 250kpa instead (my spare tyre is smaller one, yr 2005). thanks.

[SoL]

@LatioR
Spare tire is definitely at higher pressure. Stick to wad is said on the tire. It unbelievably high, but thats normal.

@ying
I seldom drive long D, so I don't really know. If your pressure is comfortable for you, by all means go ahead. But be careful, long D driving with underinflated tires is dangerous.

[zzyzx]

hi ying, wat's yr tyre pressure in Sg and while travel to malaysia? My at 250 and 235 now and intend to try this pressure at malaysia too. Will take small step to increase the tyre pressure to 260~270 later on in Sg.

Hi anyone know abt the spare tyre pressure, notice something written on tyre like "inflat to 420kpa or 60psi" yesterday night. Not sure if it's correct or not? Decided to top up to 250kpa instead (my spare tyre is smaller one, yr 2005). thanks.

\


wah... 420... will burst or not?

[SoL]

If the tire writes 420 den pump 420 lor. Better than next time need to use, change to spare also like no change cause spare tire also no air LOL.

[zzyzx]

think must wear face mask etc in case it burst on me. i kia si la. haha...

[detach8]

har? what's written ON the tire is the maximum pressure. it is not the recommend pressure. u should pump the manufacturer's recommended pressure written on the side of the driver door. for spare tyre it is good to keep the same pressure as the front tire (33psi i think). it is ok to exceed - i pump 35psi, but please do not whack until the rating on the tyre sidewall for various safety reasons.

[SoL]

Hey detach8, if you read my previous post I actually showed why pumping more air is safe. Its ok to stick with the recommended though, just remember to check the pressure fortnightly, because underinflated tires is the thing that's really dangerous.

For the spare tire, I think I read somewhere before that you're supposed to inflate till very high. Can't remember where, maybe manual? Shall check it later if I have time.

[Ying]

ok, need to clear this out.

what I know is there are two type of spare tyre on sedan Latio.
1) smaller size -- these type have to pump with very high pressure, not all petrol station can support.
2) Full size  -- this is just like your other tyre which you pump 33psi.

LatioR,
When I drive in malaysia, 240,230 full load else 230,210. my route have many uneven small road.

[LatioR]

hi bro ying, thanks for the info. Went back to in law house during wkends and just went to KLIA this morning with tyre pressure at 250 and 235 and the drive really uncomfortable but still bearable. Next time mb only pump to 240 and 230 when travelling on NSHW or 250+/230+ while in local. It's really can help the FC, my last FC in NSHW (90% HW and 10% town area), can hit ~16km/l liao vs normally hit ~13km/l+ (of course with the help of changing new EO + engine flush at cousin in law workshop)

[liewks]

Cool! Another 19+km Latio :-). My last tank was 19.35km/L. Lifetime FC is now 19.07km/L. Record was a 22.12km/L tank.

But my tyres are only at 285/245kPa. Like SoL, I don't think this is a problem. Tyre wear has been even so far.

The "sweet spot" for CVT equipped the Latio is to go as slow as you dare and to keep an eye on the RPM/Speedometer and keep your gear ratio at the tallest possible (about 200rpm for every 10km/h).

With a constant 70km/h, no A/C, I think 24+km/L is possible.

Actually, pumping more air is much safer than having not enough air. The common misconception that pump more air will lead ur tires to bulge is because last time tires were poorly designed. Now new tires have steel belts in them, so its perfectly ok to pump more air.

I pump 300 on all 4, and combined with slower driving at 90km/h, I achieve FC of 19+km/l constantly. There's other techniques as well though.

People often complained that my ride is  bumpy. Yeah, it is, but when I told them I'm getting 19km/l, they go "oooh". So its a matter of whether you want to ride comfortably or save money, and considering the roads in SG are already relatively smooth, I'd go with saving money anytime.

[clarence]

To achieve 24km/l at constant 70km/h without aircon may be possible but only if you wind up your windows and leave a only small gap to allow some air to flow into the cabin.

Or you can wind all your window full up, and turn on the fan mode to allow outside to flow into the cabin.

But if the weather is hot, you will likely be sweating like mad in your car.   

If you wind down your windows too low, it creates wind resistance which may affect your record breaking fuel economy. .

[liewks]

Does anyone in the Forum have the face-lifted Latio with the FC meter?

If so, would the owner be open to collecting some facts that might help the rest of us with no FC meter?

Perform the following FC measurements:
- constant 60km/h, no A/C, both front windows 1" open
- constant 70km/h, no A/C, both front windows 1" open
- constant 80km/h, no A/C, both front windows 1" open
- constant 90km/h, no A/C, both front windows 1" open

Repeat above, but with A/C @ 27C, fan 1, windows closed.

Average over a reasonable distance.

Thanks!

[SoL]

There's strategy for opening windows too. Lower 1 inch is ok, but open only the driver's and the passenger's rear window. This makes the wind blows diagonally across the car and you can feel the wind better.

 Should improve FC too, since air can go in come out in a smooth path, not like 2 front window open.

[Jazz]

Cool! Another 19+km Latio :-). My last tank was 19.35km/L. Lifetime FC is now 19.07km/L. Record was a 22.12km/L tank.

But my tyres are only at 285/245kPa. Like SoL, I don't think this is a problem. Tyre wear has been even so far.

The "sweet spot" for CVT equipped the Latio is to go as slow as you dare and to keep an eye on the RPM/Speedometer and keep your gear ratio at the tallest possible (about 200rpm for every 10km/h).

With a constant 70km/h, no A/C, I think 24+km/L is possible.

Bro,

Care to share how you calculate your FC. 

[LatioR]

Cool! Another 19+km Latio :-). My last tank was 19.35km/L. Lifetime FC is now 19.07km/L. Record was a 22.12km/L tank.

But my tyres are only at 285/245kPa. Like SoL, I don't think this is a problem. Tyre wear has been even so far.

The "sweet spot" for CVT equipped the Latio is to go as slow as you dare and to keep an eye on the RPM/Speedometer and keep your gear ratio at the tallest possible (about 200rpm for every 10km/h).

With a constant 70km/h, no A/C, I think 24+km/L is possible.

hi liewks, look like u r another lation with very high tyre pressure and damn gd FC . For me, must try to top up to 270 and 250 liao to see if the FC really can gain much. Thanks for the sharing and a big challenge for me to go to next level

[Ying]

70kmh on Singapore hw still ok but I prefer to pay a bit more  driving constant 100kmh on NSHW which give ~16km/l.

anyone with ECU map want to break the record FC 

[liewks]

To start recording FC for the first time:

1. Head to your favourite petrol station and top off the tank. I just let the pump attendant do it.
2. Reset your trip meter AND/OR record your odometer reading.
3. Drive, drive, drive down to say, 1/4 tank.
4. Return to your favourite petrol station, and top off the tank the same way. Note down the amount of petrol you paid for (A).
5. Note the mileage either by reading the trip meter or subtracting the previously recorded odometer reading from the current odometer reading (B).
6. Then do the math: (B)/(A) to get km/L. To repeat, start from (2) again.
7. To get lifetime average, keep a spreadsheet with all your (A) and (B) data. So lifetime FC would be (Total B)/(Total A) which is not the same as avg((B)/(A)).
* Accuracy is limited by:
- variation in pump cut-off point
- variation in ambient temperature
- variation in pump flow meter
- driveway gradients
- etc, etc...

It's addictive trying to best your previous top score for FC everytime you top off. Helps to break the monotony of a long work commute. FC hasn't been great lately because of route changes and multiple forays into the CBD area.

Bro,

Care to share how you calculate your FC.