My FC Getting Better With Low RPM

[liewks]

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.

Sorry, what I meant to say was that if one could get 17~18km/L by flooring it and getting to 5k rpm, then he should be able to get even better mileage by avoiding that... There must be some magic in the technique because I don't think I can get anywhere near 17~18km/h if I accelerate like that. Perhaps there could be a group meet to teach the technique? It would be easy to monitor the effectiveness in an FL Latio with the instantaneous+average FC meter. Now if TCM could retro-fit that FC meter into the pre-FL Latio...

[Latiorarri]

Sorry, what I meant to say was that if one could get 17~18km/L by flooring it and getting to 5k rpm, then he should be able to get even better mileage by avoiding that... There must be some magic in the technique because I don't think I can get anywhere near 17~18km/h if I accelerate like that. Perhaps there could be a group meet to teach the technique? It would be easy to monitor the effectiveness in an FL Latio with the instantaneous+average FC meter. Now if TCM could retro-fit that FC meter into the pre-FL Latio...

Hee.. if can retro fit me also want.

[limck007]

Hee.. if can retro fit me also want.

ME toooooo.. i dont mind the meter leh

[fri13th]

Sorry, what I meant to say was that if one could get 17~18km/L by flooring it and getting to 5k rpm, then he should be able to get even better mileage by avoiding that... There must be some magic in the technique because I don't think I can get anywhere near 17~18km/h if I accelerate like that. Perhaps there could be a group meet to teach the technique? It would be easy to monitor the effectiveness in an FL Latio with the instantaneous+average FC meter. Now if TCM could retro-fit that FC meter into the pre-FL Latio...

Hi guys! let me clear something on my acceleration at 5k rpm......i normally only do that when i am filtering into the expressway to reach my cruising speed of about 90km/hr and time taken is only a few seconds in 5krpm after that speed is reach i will relax and let the car cruise at the highest gear at 1.8krpm speed at 90km/hr.....on main roads i seldom press hard on the pedal and just relax let my car roll to cruising sped around 60-70km/hr at around 1.2krpm-1.4rpm and try to time the traffic lights for the reason being that i find no point to chiong fast on our main roads as i find that we will very fast kanna stop at traffic lights which i feel is a waste of fuel? Correct me if i am wrong

[Toalson]

Hi guys! let me clear something on my acceleration at 5k rpm......i normally only do that when i am filtering into the expressway to reach my cruising speed of about 90km/hr and time taken is only a few seconds in 5krpm after that speed is reach i will relax and let the car cruise at the highest gear at 1.8krpm speed at 90km/hr.....on main roads i seldom press hard on the pedal and just relax let my car roll to cruising sped around 60-70km/hr at around 1.2krpm-1.4rpm and try to time the traffic lights for the reason being that i find no point to chiong fast on our main roads as i find that we will very fast kanna stop at traffic lights which i feel is a waste of fuel? Correct me if i am wrong

Bravo u had applied the fuel saving techniques correctly. By having high rpm for merging into expressway speed limit does help with FC. But if on normal roads it will kill the FC. Going slowly to achieve highway speed will result in poor FC.

[clarence]

So am I correct to say that it is more economical to rev hard to 5000rpm to achieve cruising speed on the highway, than to accelerate gently on the highest gear to achieve criusing speed? 

fri13th, do you hit 5,000rpm on 2nd or 3rd gear? (if you are driving  Latio 4A/T)

[fri13th]

So am I correct to say that it is more economical to rev hard to 5000rpm to achieve cruising speed on the highway, than to accelerate gently on the highest gear to achieve criusing speed? 

fri13th, do you hit 5,000rpm on 2nd or 3rd gear? (if you are driving  Latio 4A/T)

I think its more economical this way but not really necessary to press untill 5krpm lar........our latio peak torque is achieve at around 4400rpm that is the point where our engine pull strongest so 4k+rpm should be more than enough ler For me mine is cvt so i dun really know which gear i am at

[LatioR]

I think its more economical this way but not really necessary to press untill 5krpm lar........our latio peak torque is achieve at around 4400rpm that is the point where our engine pull strongest so 4k+rpm should be more than enough ler For me mine is cvt so i dun really know which gear i am at

Hi bro fri13th, thanks for the great input .Hv tried recently to increase the tyre pressure & .......


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Here u r... i'm on 270/250 too liao but yet to achieve the great FC close to what u guys achieved. Yr input here will be great help & think like stop going JB and to monitor the FC. So far still maintain 12+ ~13km+/l depending how "chia lak" the jam at chkpt. Thanks

[fri13th]

Hi bro fri13th, thanks for the great input .Hv tried recently to increase the tyre pressure & .......


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.....

Here u r... i'm on 270/250 too liao but yet to achieve the great FC close to what u guys achieved. Yr input here will be great help & think like stop going JB and to monitor the FC. So far still maintain 12+ ~13km+/l depending how "chia lak" the jam at chkpt. Thanks

Hehe tell u a secret hor........my last few tanks of FC calculation was also around 17/18km/litre made on trips to jb with chia lak jams also but dunno why the FC still remain good? Maybe is becos i park at the slope of the caltex station to pump petrol thus able to pump a few litres more?

[fri13th]

Hey guys! i got 1 tip for saving abit of petrol when kanna jam at causeway at night dun on ur headlight just on the small light can ler i believe it can save some petrol and bulb life too

[clarence]

I thought the headlights get their power supply from the car battery and has nothing to do with petrol consumption? 

[Toalson]

I thought the headlights get their power supply from the car battery and has nothing to do with petrol consumption? 

When engine is running all electical supply comes from the alternator and not the battery. Battery is only for initial start up.

[Toalson]

I think its more economical this way but not really necessary to press untill 5krpm lar........our latio peak torque is achieve at around 4400rpm that is the point where our engine pull strongest so 4k+rpm should be more than enough ler For me mine is cvt so i dun really know which gear i am at

Correct, need to understand what is the max torque and that will determine how fast the car and move off. And its pretty pointless to rev higher than max torque as its a waste of petrol. And maintaining rev at max torque will ensure very quick pickup.

However at higher speed, the bhp of the engine will determine how fast u can go; i.e. max speed. That's why small cars tend to lose the bigger cars when trying to accelerate from beyond 100km/h.

[limck007]

I think its more economical this way but not really necessary to press untill 5krpm lar........our latio peak torque is achieve at around 4400rpm that is the point where our engine pull strongest so 4k+rpm should be more than enough ler For me mine is cvt so i dun really know which gear i am at

to summary fri13th's secret>>

1)Expressway>> rev hard till 3.5Krpm to 4krpm so as to achieve 90km/h in shortest time then relax to 1.8Krpm/2.2krpm to maintain at 90km/h.
2)Main Road>> Dont step the pedal too hard, maintain at 2k rpm.

Am i correct to say these??

[fri13th]

to summary fri13th's secret>>

1)Expressway>> rev hard till 3.5Krpm to 4krpm so as to achieve 90km/h in shortest time then relax to 1.8Krpm/2.2krpm to maintain at 90km/h.
2)Main Road>> Dont step the pedal too hard, maintain at 2k rpm.

Am i correct to say these??

Yes bro but these 2 points are only part of my secret of good FC......pressing hard to reach cruising speed at expressway have to depend on road condition like if its up hill slope i would advise to stay at 2krpm and if its flat or even better if down slope i will press harder to take advantage of gravity to pick up my speed

For cruising on highway i do not stay at 90km/hr constanly as i adapt my speed according to gravity.....example if i know that i am approaching a uphil slope i will step on the throttle slightly harder to reach maybe 100km/hr to build up my car kinetic energy to go up the hill but i will still stay at highest gear and not press that much to let gear shift to lower range as that would mean that our engine is wasting fuel to fight with gravity and when i reach the top of the slope i will than let the car glide down it to reach speeds up to 110km/hr and very slowly gently ease the throttle to let it reach back to 80-90km/hr

For normal road actually quite simple to get good FC if we all follow the logic of 'The less u brake the better ur Fc' & 'The moment u release the throttle no fuel is consume untill ur speed fall untill about 30km/hr' soo we try if we can to look further to anticipate traffic and lights and let the engine do the braking and not the brakes to save on the fuel and brake pads

[LatioR]

Hehe tell u a secret hor........my last few tanks of FC calculation was also around 17/18km/litre made on trips to jb with chia lak jams also but dunno why the FC still remain good? Maybe is becos i park at the slope of the caltex station to pump petrol thus able to pump a few litres more?

hi bro, u should minus 2~3 l to calculate the correct FC mah..rite?

[LatioR]

Yes bro but these 2 points are only part of my secret of good FC......pressing hard to reach cruising speed at expressway have to depend on road condition like if its up hill slope i would advise to stay at 2krpm and if its flat or even better if down slope i will press harder to take advantage of gravity to pick up my speed

For cruising on highway i do not stay at 90km/hr constanly as i adapt my speed according to gravity.....example if i know that i am approaching a uphil slope i will step on the throttle slightly harder to reach maybe 100km/hr to build up my car kinetic energy to go up the hill but i will still stay at highest gear and not press that much to let gear shift to lower range as that would mean that our engine is wasting fuel to fight with gravity and when i reach the top of the slope i will than let the car glide down it to reach speeds up to 110km/hr and very slowly gently ease the throttle to let it reach back to 80-90km/hr

For normal road actually quite simple to get good FC if we all follow the logic of 'The less u brake the better ur Fc' & 'The moment u release the throttle no fuel is consume untill ur speed fall untill about 30km/hr' soo we try if we can to look further to anticipate traffic and lights and let the engine do the braking and not the brakes to save on the fuel and brake pads

Hi bro. thks for the sharing as i tot going down the slope shd let it slide down by turn on neutral gear, and look like it's another way round. Will try it up. 

[clarence]

For normal road actually quite simple to get good FC if we all follow the logic of 'The less u brake the better ur Fc' & 'The moment u release the throttle no fuel is consume untill ur speed fall untill about 30km/hr' soo we try if we can to look further to anticipate traffic and lights and let the engine do the braking and not the brakes to save on the fuel and brake pads

The moment I release the trottle, no fuel is consumed?

I though as long as the engine is running, fuel will be consumed.

Can you enlighten me?

[limck007]

The moment I release the trottle, no fuel is consumed?

I though as long as the engine is running, fuel will be consumed.

Can you enlighten me?

To my understanding, as long as u depress ur accelerator, the fuel will be injected. BUT if u dont press it, no fuel will be injected loh..

thats y, when i go downslope, i dont depress the accelerator... let gravity do the work for me + i save fuel aka $$$

[limck007]

I think its more economical this way but not really necessary to press untill 5krpm lar........our latio peak torque is achieve at around 4400rpm that is the point where our engine pull strongest so 4k+rpm should be more than enough ler For me mine is cvt so i dun really know which gear i am at

been trying your method hehe, rev to 3+K rpm to hit 90km/h

but i find that the ride is not very comfortable, quite jerky>>i think it is due to  the acceleration  when i step and the deceleration when i release the pedal

Anyone who tried Fri13th's method, do you have this  feeling ?