FC drop after putting sub in boot

[joyrob]

hi all... i got this problem.. i used to have FC of around 14.5 to 15km/litre  for my sedan.. but after i install a 12 inch sub (about 11kg) in the boot, the FC drop to about 13plus to 14 at most.. but then how come an 11kg item can cause the FC to drop so much ? or is it not correct to place heavy items in the boot ?

doesn't make sense.. even when i fetch my wife and kid last time without the sub, the FC dun drop as much.. very strange....

[FamilyManz]

hi all... i got this problem.. i used to have FC of around 14.5 to 15km/litre  for my sedan.. but after i install a 12 inch sub (about 11kg) in the boot, the FC drop to about 13plus to 14 at most.. but then how come an 11kg item can cause the FC to drop so much ? or is it not correct to place heavy items in the boot ?

doesn't make sense.. even when i fetch my wife and kid last time without the sub, the FC dun drop as much.. very strange....

batt working harder = alternator working harder?

btw.... fc still good mah....

[Carmodz]

agree with stephen...damn good liao.....

sorry, i know its not helping you by saying that, and i honestly dunno whats causing your higher petrol consumption. I got a rather heavy sub myself and twice so far, i can clock 13.5km/l usually its about 10+km/l

BTW, any one of you guys here getting low fc even when being light footed? <2k rpm? Cos i kinda notice my fc actually gets better if i rev it.

[josho]

Other than just that, did you put anything on your car? Driving manner same? Petrol? Not servicing yet? Just wondering because after servicing my FC did drop 

[xuan511]

agree with stephen...damn good liao.....

sorry, i know its not helping you by saying that, and i honestly dunno whats causing your higher petrol consumption. I got a rather heavy sub myself and twice so far, i can clock 13.5km/l usually its about 10+km/l

BTW, any one of you guys here getting low fc even when being light footed? <2k rpm? Cos i kinda notice my fc actually gets better if i rev it.

Got ppl say before the Latio engine is more FC between the 2~3k rpm range.. if drive below 2 FC will become bad..

perhaps u should give it a try =D

[NotYetz]

agree with stephen...damn good liao.....

sorry, i know its not helping you by saying that, and i honestly dunno whats causing your higher petrol consumption. I got a rather heavy sub myself and twice so far, i can clock 13.5km/l usually its about 10+km/l

BTW, any one of you guys here getting low fc even when being light footed? <2k rpm? Cos i kinda notice my fc actually gets better if i rev it.

I'm light footed... <2k rpm 99% of the time. Used to get quite good fc... about 14+km/l even after I changed my rims to 17". But now... sigh...  about 12km/l. Not too sure what happened. 

Got ppl say before the Latio engine is more FC between the 2~3k rpm range.. if drive below 2 FC will become bad..

perhaps u should give it a try =D

Oh... is that for cvt or 4AT?

[josho]

I'm light footed... <2k rpm 99% of the time. Used to get quite good fc... about 14+km/l even after I changed my rims to 17". But now... sigh...  about 12km/l. Not too sure what happened. 


Oh... is that for cvt or 4AT?

CVT is Sport right? Heh...

Dun try better... I tried twice... FC up and down... But I change my E.O. recently so I dun want to try so much... You changed to 17" still having good FC?? Whats ur Rim weight and brand? (kay po  )

Just keep on monitoring. Or talk to your car... guai guai hor...  .. Im  today due to ytd RT training 

[FamilyManz]

Oh... is that for cvt or 4AT?

some dude went to TCM, & the service manager did a trial & inform tat its due to CVT running on low gear...tats why must rev.

i tends to agree & disagree.... as CVT does not run on gear but ratio...... so even rev should be ok. 

my fc recently drop to 11 from 13+..... other than rear exhuat kena jialat jialat few time recently.... i also notice tat it start to drop drastically @ 6K after oil change...... I tends to think it has something to do with the fastflo oil tat was used @ my last servicing......

[joyrob]

i done servicing not long ago.. anyway i still monitoring. my driving habit dun change much. i rev to about 2.3k rpm for the first few gears, then cruising speed is 2 to 2.1k at around 90 to 100kmh..

[josho]

i done servicing not long ago.. anyway i still monitoring. my driving habit dun change much. i rev to about 2.3k rpm for the first few gears, then cruising speed is 2 to 2.1k at around 90 to 100kmh..

  Good good... Hope ur FC goes better! 

may I know ur rim and tyres? 

[FamilyManz]

both ur nick almost similar.... i almost tot one is quoting own postings

[joyrob]

15inch GR80 185/65 , with stock rims

[josho]

both ur nick almost similar.... i almost tot one is quoting own postings

HAHAHA    You need a new ???

Now I see wrongly!!! I mistaken Carmodz to joyrob posting!!!  (too bored in office.... Been posting non stop  )

Carmodz- which rim you using.. I know you using Hankook, right?

[iagree]

15inch GR80 185/65 , with stock rims

after i chg to Mobil1 fully synthetic oil @ KL, my FC is abt 13.5km/litre (this tank, i used it from KL to jb 2ndlink). my record for the FC was 17km/l with mineral oil for my 1k, 5k and 11k servicing with TCM. the weeks b4 i service my 17km, my FC dropped to 11.x km/litre.

i believe, if i would change my tyres to better one e.g. GR80 with stock rim of coz, then my FC might improve too?

regards.

[infinityx]

HAHAHA    You need a new ???

Now I see wrongly!!! I mistaken Carmodz to joyrob posting!!!  (too bored in office.... Been posting non stop  )

Carmodz- which rim you using.. I know you using Hankook, right?

Carmodz is using 5Zigen rims(pretty light, think around 7.2kg). Using HanKook S1 Evo tyres.

PS: Ken, I hope you don't mind about the "free advertise info" of your rims and tyres! 

[josho]

Carmodz is using 5Zigen rims(pretty light, think around 7.2kg). Using HanKook S1 Evo tyres.

PS: Ken, I hope you don't mind about the "free advertise info" of your rims and tyres! 

  Thanks buddy. I think Carmodz dun mind la  Hor? (Im looking around for tires and maybe rims tho)

May I know who did any VS?

[NotYetz]

CVT is Sport right? Heh...

Dun try better... I tried twice... FC up and down... But I change my E.O. recently so I dun want to try so much... You changed to 17" still having good FC?? Whats ur Rim weight and brand? (kay po  )

Just keep on monitoring. Or talk to your car... guai guai hor...  .. Im  today due to ytd RT training 

Mi using Buddyclub P1 rim... ehh... dun remember it's weight leh... but if i didn't remember wrongly... it's slightly lighter than stock rims.

Mi light footed mah... that's why 17" still quite good FC.... last time lah... now... 

Mi almost going for 20K servicing... maybe 'feedback' to TC see how.

Wah... RT training so siong?   

[josho]

Mi using Buddyclub P1 rim... ehh... dun remember it's weight leh... but if i didn't remember wrongly... it's slightly lighter than stock rims.

Mi light footed mah... that's why 17" still quite good FC.... last time lah... now... 

Mi almost going for 20K servicing... maybe 'feedback' to TC see how.

Wah... RT training so siong?   

Haha.. Better be even more light footed! PETROL INCREASE AGAIN!!!!

RT- siong... walk also siong leh... someone vomited after the run.. I jog within my limit... got exercise better then I never start at all. 

[Jazz]

Got ppl say before the Latio engine is more FC between the 2~3k rpm range.. if drive below 2 FC will become bad..

perhaps u should give it a try =D

More FC = bad ??

So which one you are trying to tell us, above 2000 rpm or below? 

[josho]

More FC = bad ??

So which one you are trying to tell us, above 2000 rpm or below? 

He is referring to this:
http://sgforums.com/forums/1962/topics/126888