what is the actual difference between an evo 123 rs and a gsr gear box

[BMGTZ]

rs revs its tits off at 100kmph...ratios are the same so where is the difference

 

[DOUGMO]

whats it revving @ @ 100KMH brian,
my evo2 gsr sits on about 3300 or so @ 100kmh from memory

 

[trq-str]

my cuz has an rs galant sits at aprox 3000 @100kph

 

[VR-4Squid]

for evo 1-3, gsr and rs gearboxes are the same.

JDM vr4 and vr4 rs gearboxes are also the same (vr4 evo and vr4 evo rs are also the same).

evo4-up had different ratios for gsr and rs.

 

[BMGTZ]

yes the ratios are the same.......but why does an rs rev higher than a gsr. also if they were the same then why would there be two boxes?

 

[BMGTZ]

whats it revving @ @ 100KMH brian,
my evo2 gsr sits on about 3300 or so @ 100kmh from memory

the car in question does
about 4000revs maybe slightly more @ 100 kmph.......thinking of putting 3.545 gears in to reduce this.

 

[evopwr]

if it's doing 4000+rpm @ 100k/hr in 5th gear then it definitely does not have 3.9 gearing. Could possibly have some non-standard extra-close ratios?

 

[Liberoz]

where did you get the box from as It might have been set up sprint track rally who knows Brian whats the gearbox code on the box?

 

[EVO-00X]

Overall wheel/tyre diameter perhaps? But probably wouldnt make that much a difference.

Anyway, looking at info I got from NZMMC the EVO III had a slightly different front diff ratio and transfer ratio.

VR4s and GSRs:
1.090 Transfer ratio (TR) (24/22)
3.867 (58/15) front diff ratio. (FDR)
3.545 (39/11) Rear diff ratio (RDR)
RDR x TR = 3.866 combined rear final drive
Total final Drive ratio TFD of 4.9333

EVO 1 and 2s:
1.090 (24/22) TR
4.266 (64/15) FDR
3.909 (43/11) RDR
RDR x TR 1.090 (24/22) = 4.264 combined rear final drive
TFD = 5.443

EVO 3
1.074 TR (29/27)
4.200 (63/15) FRD
3.909 (43/11) RDR
RDR x TR = 4.199 combined rear final drive.
TFD = 5.358

Story time: When my younger brother's EVO 1 LSD gearbox died (when it was still running as a FWD with locking spline), he had the internals rebuilt using what was described to him as brand new 'EVO III quick ratio' components purchased from Ralliart. His friend's shop did the build. When his car got back on the road it possessed a remarkable difference in acceleration. I didnt believe him at first because I thought, 'how much of a difference could it make?'.... that was until I took it for a drive. It was quick before, but after the box was rebuilt with the alleged 'Ralliart' ratios it was bullshit quick!!! Traction was non existent at the plant of the right foot even at 60kmh! Torque steer on acceleration was remarkable... and its an evo engine with sotck ECU, injectors and turbo. I dont know what was put into it, but everyone who took it for a drive or went for a spin noticed the dramatic difference from beofre and after the rebuild.

Now his coupe has been converted to AWD and off the road. It would be interesting to see what rpm it sits at 100kmh to compare. Also interesting to see if his existing EVO 1 transfer case is a mis-match.

 

[VR-4Squid]

if it's doing 4000+rpm @ 100k/hr in 5th gear then it definitely does not have 3.9 gearing. Could possibly have some non-standard extra-close ratios?

could be 3.909 diff with a vr4 or cd5a gearset that originally had a 3.545 ratio..

I have the factory brochures saved on my comp and have the gear ratio's listed - quality is poor, but you can clearly see there's only one set of ratio's listed for both GSR and RS (evo3's in this case).

Edit: it's under specifications and level with the side view of the car.

 

[EVOCPE]

It matches Rob, i already took it on the freeway over 120km/h

The car accelerates very easy and as soon as i change gears it on boost right away, just loves to pull

 

[BMGTZ]

the gear box code is for an evo 1 rs