My FC Getting Better With Low RPM

[Ender]

Hello guys,

Last Sunday, when i drove back from Msia to JB 2ndlink to SG with 110km/h & 2000 to 2200RPM, my FC has increased back to 17.5km/L.

Song!

Regards.

Despite some saying about 90km/hr is the sweet spot for latio FC. I personal experience also agrees with you. Came back from Cameron Highland along NSHW, controlling within the speed limit of 110km/hr, I also hit 17.1km/l...

[dsrio]

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.

thats very good fc 

[Ender]

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.

300 is at the upper limit the my tyre spec.. There's no margin left.

[SoL]

I know people who constantly exceed 300, don't worry, it won't explode LOL.

Besides, if you check the tire, they say maximum safety load is if tires are at 300kPa, so I think its safer to have properly inflated tires when carrying more load. Not very sure about this part though, any bros care to clarify?

[clarence]

My take is that fuel economy is not worth it at the expense of safety.

If you pump 300Ka when the tyres are cold, after constant driving and the tyre heats up, the pressure will exceed 300KPa.

You can bend down and look at a tyre inflated to 300KPa. Its sides or corners of the thread would be tilting upwards.

To see the amount of tyre contact your  tyre has with the road, rinse your tyre thread with water to clear off all dirt, then drive a short distance, and look at your tyre thread again, you will see dirt sticking onto the parts of your tyre which has contact with the road.

Or just drive your dry tyres over a damp road, and the wet part indicates the  part of your tyre thread that has contact with the road.

[SoL]

If you're not comfortable with tires at maximum sidewall pressure, you can follow a general rule of maximum-10%. So 270 is a perfectly good place to start with, if you don't mind the bumps.

Tires bulging at the middle is something from way back when tires did not have steel belts. Nowadays, higher pressure leads to much better wear. So in fact, higher pressure makes your car safer.

Check out this link for more info.
http://www.officer.com/web/online/Editorial-and-Features/Driving-Under-Pressure/19$27281

[LatioR]

hi SoL, look like u r the #1 top tyre pressure within TLC liao..RG at 280 & 260 will be 2nd and bro fri13th #3 i think at 270 and 250. Nevertheless, do take into consideration of safety too, OK. Mine started off with my very old car at 210 for all tyre. Then on latio, started with the recommended pressure at 230 and 210. Now started to slowly increased to 240/220 and to 250/235 now...the car feel much lighter now...In Sg, the rd is perfectly for high pressure tyre but don't think so in Malaysia..

[LatioR]

please correct me but won't overinflating our tyres make our ride more bouncy thus decreasing ride comfort?

hee, now post also very stressful in case give wrong info

hi bro dsrio, don't worry so much abt giving wrong info lah...some expert outside there will be ready to give their expert view one lah...by the way, to each is his own mah! Nothing wrong or right one lah..any exp shared is very important to all.

[SoL]

hi SoL, look like u r the #1 top tyre pressure within TLC liao..RG at 280 & 260 will be 2nd and bro fri13th #3 i think at 270 and 250. Nevertheless, do take into consideration of safety too, OK. Mine started off with my very old car at 210 for all tyre. Then on latio, started with the recommended pressure at 230 and 210. Now started to slowly increased to 240/220 and to 250/235 now...the car feel much lighter now...In Sg, the rd is perfectly for high pressure tyre but don't think so in Malaysia..

Yeah, in Msia I'll reduce pressure because of bumpy roads and long-D driving. Here in Singapore I feel that its ok to ride with high pressure.

But I still find it weird that car makers place tire pressure recommendations on their car. After all, they don't make the tires. I can't help but think if its a conspiracy to make us think latio ride is very smooth by asking us to use lower pressure. 

[LatioR]

maybe u r rite...by the way, what's the pressure travelling in Malaysia?

[SoL]

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.

[alangohek]

Yeah, in Msia I'll reduce pressure because of bumpy roads and long-D driving. Here in Singapore I feel that its ok to ride with high pressure.

But I still find it weird that car makers place tire pressure recommendations on their car. After all, they don't make the tires. I can't help but think if its a conspiracy to make us think latio ride is very smooth by asking us to use lower pressure. 

I suspect when they POC a particular model, the recommended pressure will yield a balanced FC and stability according to the presence of the manufacture. (I could be wrong, haha)

[iagree]

Despite some saying about 90km/hr is the sweet spot for latio FC. I personal experience also agrees with you. Came back from Cameron Highland along NSHW, controlling within the speed limit of 110km/hr, I also hit 17.1km/l...

Hi Ender

iagree. Light footed is always the best ^$^

[Jazz]

Hi Ender

iagree. Light footed is always the best ^$^

Hi iagree,

Light footer is 1 of the best but not always the best, there are few factors contributing to good FC, tyre pressure, weight of the car and traffic condition. 

[SoL]

I think for me the biggest improvement to my FC comes from the way I drive.

Braking reduces FC.

I see some people chiong off at traffic light and then brake hard at a red light 50m ahead. Or people braking for no reason on expressway.

One technique I use is to pretend I'm driving without brakes. Brake only when you have to. That way you won't accelerate or brake needlessly and your FC will definitely have a big improvement. Plus you save on brake pad replacement. 

[iagree]

hi

well, i aso agree with SoL & Jazz :)

[Jazz]

I think for me the biggest improvement to my FC comes from the way I drive.

Braking reduces FC.

I see some people chiong off at traffic light and then brake hard at a red light 50m ahead. Or people braking for no reason on expressway.

One technique I use is to pretend I'm driving without brakes. Brake only when you have to. That way you won't accelerate or brake needlessly and your FC will definitely have a big improvement. Plus you save on brake pad replacement. 

Shouldn't be Braking increases FC.

[SoL]

Oh yeah Jazz you're right!

[iagree]

Oh yeah Jazz you're right!

hi

u both kong si mi?

[SoL]

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.