4G15 Gearbox n Ratio

[devraj]

Hi Sifu Sifu out there....

need an advise on this... i'm using 4g15 engine with original gearbox from 4g13.
I found that when im running on 110km/h the RPM is hitting to 4.5 - 5..

is there anything i can do? can i use any other gearbox to reduce the ratio?
advise what i can do? what wil b the positive n negative if i change the g/box

 

[SkYwAlKeR]

change ur final gear ratio... but that will be costly...
there is a reason for such high rpm... 4g15 isnt a powerful engine... it needs close gear ratio to extract the best power out of ur engine...

 

[rayracer]

skywalker!! where to found it the close ratio for 4g13 gear box?

 

[devraj]

so what i can do about my gearbox lah? i dont wanna change engine again lah... money matters..... what i can wit wat m having now?

 

[SkYwAlKeR]

err... our gearbox gear ratio is somewhat consider close already... no need to get a closer one or u'll mess up everything....

 

[cipan_supercas]

Hi Sifu Sifu out there....

need an advise on this... i'm using 4g15 engine with original gearbox from 4g13.
I found that when im running on 110km/h the RPM is hitting to 4.5 - 5..

is there anything i can do? can i use any other gearbox to reduce the ratio?
advise what i can do? what wil b the positive n negative if i change the g/box

Proton 1.3 and 1.5 have exactly the same gear ratios. I suspect that you have slipped your clutch or your tachometer and speedometer are not reporting correctly.

 

[MiOKu]

Proton 1.3 and 1.5 have exactly the same gear ratios. I suspect that you have slipped your clutch or your tachometer and speedometer are not reporting correctly.

i think so also...

 

[devraj]

Then what is the reading supposed to be in my speedometer of tachometer?

 

[SkYwAlKeR]

as for mine, 120kmh @ 3.8k rpm....
me driving stock standard 4g13p iswara....

 

[ky_fei]

my 4g15 gb hybrid with mivec gb final drive, ok for city driving , but not nice for long trip . =S 90++kmh @ 3k rpm

 

[putra4767]

i have a wira 4g15p... i feel it's very good oledy bro compared to 4g13...which is
kinda sluggish i feel for a wira...Iswara is ok coz it's lighter

 

[SkYwAlKeR]

iswara with 4g15 is ok....
but final drive rpm is kinda high... not good if u are using noisy muffler or if u wanna save fuel in long distance drive....

 

[devraj]

4g13p ya correct u can get 3.5-4rpm when u hitting 110-120....
but im talking about 4g15p with 4g13p gearbox.....

4g13p and 4g15p is same gearbox for 100%?? or is there any slight diffrences? if yes pls let know.....by technically or in mechanically

so sifu sifu all telling ...that its on right condition is it? so i supposed not to worry about the ratio isit?

 

[SkYwAlKeR]

according to cipan sifoo in previous post, both 4g13p and 4g15p using exactly the same gearbox with similar gear ratios...

 

[ky_fei]

change to 1.6 or 1.8 final drive , 4.2 sumthing
then u can cruise highway without worries, but if u plan to drive normally, stick to the same final drive ratio. =) coz converting final drive ratio gonna cost , not a bomb, but at least, it burn holes in ur wallet

 

[g88]

there is no different between 4G13 and 4G15 gearbox as they using the SAME model F5M21 gearbox.

I can't really what's the RPM at 110km/h but 5th gear at 80km/h my RPM is around 2370 RPM...before i fix it it was 2520 RPM (measurement from digital device)

Btw, mne is 4G15 carby old junk

 

[devraj]

so nothing to worry lah ?

 

[g88]

if dun believe...check here. Same gear ratio and same gearbox !! Eheheh...

http://www.eon.com.my/article.cfm?id=64

 

[rayracer]

really? which model of 1.6 final drive fit to 4g13 gear box?

4g92? how much will coz??

 

[Shinjite]

I dunno about manual, but I read through my manual book, for 1.6 auto GB and auto 1.5, the first 3 gears, both ratios are the same