4G15 Gearbox n Ratio

devraj

Known Member
Senior Member

devraj

Known Member
Senior Member
Sep 6, 2005
135
0
1,516
Malaysia
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

Over 10,000 RPM!
Senior Member

SkYwAlKeR

Over 10,000 RPM!
Senior Member
Mar 12, 2005
10,139
300
5,183
ePoh ~ malacca
Visit site
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...
 

devraj

Known Member
Senior Member

devraj

Known Member
Senior Member
Thread starter
Sep 6, 2005
135
0
1,516
Malaysia
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?
 

cipan_supercas

1,500 RPM
Senior Member

cipan_supercas

1,500 RPM
Senior Member
Feb 4, 2004
1,698
7
3,138
Shah Alam
www.draxecu.com
devraj said:
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

Known Member
Senior Member

MiOKu

Known Member
Senior Member
Oct 27, 2005
136
0
1,516
cipan_supercas said:
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

Known Member
Senior Member

devraj

Known Member
Senior Member
Thread starter
Sep 6, 2005
135
0
1,516
Malaysia
Then what is the reading supposed to be in my speedometer of tachometer?
 

putra4767

500 RPM
Senior Member

putra4767

500 RPM
Senior Member
Sep 13, 2004
550
0
3,016
Visit site
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

Over 10,000 RPM!
Senior Member

SkYwAlKeR

Over 10,000 RPM!
Senior Member
Mar 12, 2005
10,139
300
5,183
ePoh ~ malacca
Visit site
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

Known Member
Senior Member

devraj

Known Member
Senior Member
Thread starter
Sep 6, 2005
135
0
1,516
Malaysia
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?
 

ky_fei

1,000 RPM
Senior Member

ky_fei

1,000 RPM
Senior Member
May 31, 2004
1,007
3
3,138
Kay Elle
Visit site
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