Gear Ratio.

[aja]

Guys,

Euro-R Tranny:
1st: 3.285 [64km/h (7800rpm => 4963rpm)]
2nd 2.090 [101km/h (7800rpm => 5527rpm)]
3rd 1.481 [142km/h (7800rpm => 5640rpm)]
4th 1.071 [197km/h (7800rpm => 5913rpm)]
5th 0.812 [259km/h]
Final 4.266


Integra R gear ratios
1st 3.230
2nd 2.105
3rd 1.428
4th 1.107
5th 0.848
Reverse 3.000
Final Drive 4.400

I noticed the ITR gear ratios...they are super close to Euro-R ..and FD is 4.2666 for Euro R & 4.4000 for ITR.

Actually what is the effect by having shorter final drive (Euro R 4.2666) and longer final drive (Integra TR 4.4000).?

anyone can help me out?. The only thing i know is shorter FD will contribute to higher top speed. Correct arr?

 

[Riezal-R]

This is the easiest way I understand the final drive concept. Example (not accurate):

FD 4.4 = 5th gear @ 3000rpm will get you 100km/h

FD 4.7 = 5th gear @ 5000rpm will get you 100km/h

So basically, your ratio gets shorter and you have to shift gears much quicker. Using a 4.785 FD, you will finish going thru all gears much faster than using a 4.4 FD.

Do correct me if i'm wrong.

 

[HanafyEG]

nicely explained..hehe, if ur gonna put turbo...4.2 fd is good but if ur gonna stay na then 4.4 or 4.7 is good..all depends on ur choice of driving..hehe :)

 

[aja]

So, technically speaking, lower FD will give much top speed la. Assuming FD 4.4 =100 kmh, so if FD 4.2 must be
Correct ka?.

 

[Riezal-R]

For application purposes, a 4.2 FD will mean that you want top-end power and a 4.7 FD will mean that you want pick-up. So to your 4.4 vs 4.2 FD, it will be something like:

4.4 FD, 5th gear @ 3000rpm = 100km/h

4.2 FD, 5th gear @ 3000rpm = 110km/h

Something like that la :unsure:

 

[aja]

Riezal,

SO, from the Euro R & ITR FD comparison above, this means that Euro R has higher top speed, as compared to ITR, right?.

 

[b18c5]

aja:-

have you ridden a mountain bike??.....put it this way a mountain bike has to set of gears right?.....6-8 at the back and 3 big ones infront right...

the 3 big gears work as the final drive.....once u change it affacts all the other 6-8 gears

:D

 

[Riezal-R]

A short answer to your question is Yes.

Comparing the Euro-R and ITR ratios + FD above, I would say that the Euro-R requires such ratio + FD due to its engine capacity. IMO, to optimise the 2.2-litre engine displacement, such ratio + FD is used to get top speed. Its common practice, sacrifice pick-up for top-speed and vice-versa.