My FC Getting Better With Low RPM

[liewks]

Looking good  ! Looks like you should be able to hit 20km/L if you keep at it .

BTW, you might be interested in following a record breaking attempt being undertaken by a team of hypermilers in the US. They are trying to topple a record set several months ago by the Taylors. This involves crossing the 48 states with the best fuel economy. The hypermilers are attempting the record breaking feat in a Civic Hybrid. I think they are currently at 64+ US MPG. This is with 3 people in the car, a boot full of luggage, climbing mountain passes and potentially negotiating snow and ice!

Hi everyone! today fuel tank lights went up and pump in 37litres of petrol milaege 664km
Thats about 18km/l really still getting better with each tank! wondering when my good Fc will reach its limit I think only time will tell

[SoL]

Its ironic that they're burning so much fuel just to set a world record for best hypermilers!

[liewks]

Its ironic that they're burning so much fuel just to set a world record for best hypermilers!

It is. Perhaps it is part of their effort to gain greater recognition amongst the community so that they can spread their methods to the sceptics.

[MadMatty]

While it is true that having a wide open throttle minimises throttle loss, there are other factors to consider. Throttle and RPM's are not necessarily directly related. Engine load can influence throttle position.

I am guilty of accelerating slowly. My aim to to spend as much time in the maximum gear ratio which loads the engine as much as possible at a given RPM. After a short blip to 1500rpm, I ease up on the throttle to get it down to 1200rpm. Wait for speed to hit 60km/hr and then there is a sort of ratio lock-up and I can accelerate the car from that point onwards in "top" gear.

If only we had a 5-MT Latio! More tricks to play with.

is there a possibility that engaging a low rpm from start for too long will affect the FC? after all engaging too low rpm means on low gear which in effects translate to higher fuel consumption as engine "dragging"...

[fri13th]

is there a possibility that engaging a low rpm from start for too long will affect the FC? after all engaging too low rpm means on low gear which in effects translate to higher fuel consumption as engine "dragging"...

Yah i think its best to press harder and reach cruising speed fast and than let the gear auto shift into the highest gear when u reach cruising speed rather than dragging the engine along at low rpm is a waste of time and maybe fuel too for me i quite often press until 5k+ rpm to reach cruising speeds in expressways and i am getting consistent good FC of 17/18km/litre

[clarence]

Wow! That is absolutely amazing and impressive! 

You can rev to excess of 5,000rpm (almost redline) and still achieve a consistent good Fuel Consumptiom of 17/18km/litre! 

Are there any special techniques to achieve your record breaking fuel economy?

[clarence]

Yah i think its best to press harder and reach cruising speed fast and than let the gear auto shift into the highest gear when u reach cruising speed rather than dragging the engine along at low rpm is a waste of time and maybe fuel too for me i quite often press until 5k+ rpm to reach cruising speeds in expressways and i am getting consistent good FC of 17/18km/litre

fri13th,

You may have missed this.

We look forward to your reply on how you managed to achieve this remarkable record breaking 17 to 18km/l feat on your Latio despite almost red lining to over 5000rpm (redline is 6500rpm).

Please share your secret with us.

[fri13th]

fri13th,

You may have missed this.

We look forward to your reply on how you managed to achieve this remarkable record breaking 17 to 18km/l feat on your Latio despite almost red lining to over 5000rpm (redline is 6500rpm).

Please share your secret with us.

Dear Clarence,

i did not miss ur question....its that i am lazy to post my driving pattern again which i posted b4 previously in this thread but nvm lar i will do it once more for u

1) % highway/city driving? 70/30
2) Brand and RON petrol used? mobil 5000
3) Tyre Pressure? Front 270, Back 250
4) Driving with air con turned on or off? Air con on 100% set temp at 23-24
5) Drive mostly during the day or at night? 50/50
6) Brand of engine oil used? amsoil 5-30w
7) Mileage? going 10k
8) How many people are usually in the car or just yourself? 3-4ppl
9) Any modifications done to your car? ez-stab and spark bridge
10) Do you use any after market additives? never before.


i think we all have to drive smart lor....example like dun fight with gravity when going up slope and floor ur pedal....down slope time press more to pick up speed faster....look further in front to anticipate the traffic lights changes the lesser u use ur brakes the better ur fc....and also leave home 15 mins earlier everyday so we dun have to rush and ram our engine unnecessary and can enjoy a safe and pleasant drive 

[clarence]

Very impressive.
    

Your Latio is really one in a million.     

Even when I just drive alone, mostly highway driving, never rev above 2500rpm, travel at 80km/h, air con thermostat set at 26 degrees, best I got was 14km/l.

[Toalson]

Fantastic! 

Well your driving pattern almost similar to mine however as mine is still a heavy small korean car till i get my new ride  and I managed to achieve 12km/L

[rooneytoon2004]

Fantastic! 

Well your driving pattern almost similar to mine however as mine is still a heavy small korean car till i get my new ride  and I managed to achieve 12km/L

congrat! saw in mycarforum that u got ur COE today.

care to tell me which korean car u r driving currently? me on getz (wating for successful COE for my new ride) and only get btw 10-11km/L

[Toalson]

Sorie tink u read wrongly, I didnt manage to get my COE cos booked at too low a price. Doubt very much TCM will give it to me. Even if willing to give me also not so soon. 

I am also currently driving a Getz. 

[rooneytoon2004]

Sorie tink u read wrongly, I didnt manage to get my COE cos booked at too low a price. Doubt very much TCM will give it to me. Even if willing to give me also not so soon. 

I am also currently driving a Getz. 

sorry for my mistake.. hope both of us can get our COE soon.

not bad for u to achieve 12km/l for getz. me trying so hard and can only acheive on 12km/l when i drive 90% on highway. but due to the increase of ERP prices & gantries...now 70% on city driving.

[Toalson]

Yup lets  together.

[rooneytoon2004]

Yup lets  together.

bro..care tell me how old is ur getz?
so did u trade it to TCM n how much did they offer u above scrape value?

[limck007]

Very impressive.
    

Your Latio is really one in a million.     

Even when I just drive alone, mostly highway driving, never rev above 2500rpm, travel at 80km/h, air con thermostat set at 26 degrees, best I got was 14km/l.

let me join ur club.. FC of 12 niah ... even with same driving habits...
nwo reaching 8K mileage and still on mineral oil

[Toalson]

bro..care tell me how old is ur getz?
so did u trade it to TCM n how much did they offer u above scrape value?

Mine a 4yr coming to 5yr and TCM say 0....  And dont noe why gong gong still take. haiz

[LatioR]

let me join ur club.. FC of 12 niah ... even with same driving habits...
nwo reaching 8K mileage and still on mineral oil

hi bro, yr car still very new and sb able to hv better FC rite? Or u must be cheongter then? Mine > 3yrs now with best achievement of 13.5+KM/l in local and ~17+km/l 100% on malaysia NSHW. Do follow some tips given by some fellow lations for better FC.

[liewks]

When you floor the pedal to hit 5K+ rpm, the engine has to go into open-loop mode momentarily. That is not really a fuel saving technique. While throttle losses are reduced, excess fuel is used to cool the engine to avoid detonation (engine burns rich when > 3/4 throttle). Also high rpms increase losses due to friction.

It is generally agreed that shifting up at low rpm in MT equipped cars is the most efficient way to accelerate. This does not mean that you need to use light throttle. Opening the throttle while keeping engine RPM low minimises throttle loss. I am not sure if 5k+ rpm on an AT has the same effect. You might be able to get 18~19km/L.

Anyway, the ECU & TCM will ensure that the engine is never "dragged".

Yah i think its best to press harder and reach cruising speed fast and than let the gear auto shift into the highest gear when u reach cruising speed rather than dragging the engine along at low rpm is a waste of time and maybe fuel too for me i quite often press until 5k+ rpm to reach cruising speeds in expressways and i am getting consistent good FC of 17/18km/litre

[clarence]

When you floor the pedal to hit 5K+ rpm, the engine has to go into open-loop mode momentarily. That is not really a fuel saving technique. While throttle losses are reduced, excess fuel is used to cool the engine to avoid detonation (engine burns rich when > 3/4 throttle). Also high rpms increase losses due to friction.

It is generally agreed that shifting up at low rpm in MT equipped cars is the most efficient way to accelerate. This does not mean that you need to use light throttle. Opening the throttle while keeping engine RPM low minimises throttle loss. I am not sure if 5k+ rpm on an AT has the same effect. You might be able to get 18~19km/L.

Anyway, the ECU & TCM will ensure that the engine is never "dragged".

No matter how hard I try, I can never achieve 18 to 19km/l when I drag my engine beyond 5,000rpm. Is there a special technique to achieve this?

I get 10+km/l at best if I drag the engine beyond 5,000rpm.

When I drag past 5,000rpm, by 2nd gear, I am almost at 100km/h.