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Old 12-12-2004, 05:23 PM   #1
rexorama
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Default STI RA gears vs STI non RA gears

I know the RA gears are a popular upgrade for budget minded builders, but has anyone used the STI non RA gears and what have your results been? I believe that the difference between the two sets would be negligible on a drag strip and the stock 4th-5th ratios the non RA gears offers would be better for long distance commutes. If all I did was auto-x and short commutes with the car I'm sure the RA gears would be the set of choice. However it seems that there are some people that believe the RA gears are the only way to go and not to bother with the non RA gears. So I'm just looking for some oppinions from the community here.

Quick reference:
Stock WRX Ratio: 3.454 (1st) 1.947 (2nd) 1.366 (3rd) 0.972 (4th) 0.738 (5th)

STi RA ratios: 3.083 (1st), 2.062 (2nd), 1.545 (3rd), 1.151 (4th), 0.825 (5th)

STi (Non-RA) ratios: 3.166 (1st), 1.882 (2nd), 1.296 (3rd), 0.972 (4th), 0.738 (5th)
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Old 12-13-2004, 04:19 PM   #2
Blitz04
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Default

From the quick reference you gave...
I don't see the point of upgrading to non-RA gear set because the ratio is less than stock WRX ratio on 1-3 gears... It'll give more mph but it'll probably going to rev slower and transfer less torque to the wheel.. other than having stronger gear teeth, I don't think it's worth getting non-RA gear..
The RA gear set has lower ratio than stock wrx on 1st gear..which means it'll rev slower than stock wrx gear on 1st gear but 2-5th gear will rev faster than stock wrx and tranfer more torque to the wheels but max mph in each gear and top speed will be decreased

If you want to transfer more torque to the wheels, than go with RA gears, and if you want higher mph in 1-3 gear than go with non-RA gears
It looks like the 4-5gear ratio on wrx gear and non-RA gears are same..

I think it will be interesting to see a race between a 270hp 270ft/lb RA gear equipped WRX vs. 300hp 300ft/lb non-RA gear equipped WRX..

Last edited by Blitz04; 12-13-2004 at 04:26 PM.
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Old 12-13-2004, 06:14 PM   #3
jlevy
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I like the non-RA ratios better personally. You get the same 5th ratio for highway cruising and closer ratios overall (than stock). There's also less of a gap between 1st and 2nd than stock which I like. I still have a totally stock trans, but will consider the non-RA gears if/when the time comes.

-my 0.02

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Old 12-13-2004, 07:40 PM   #4
moremaga
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Quote:
Originally Posted by jlevy
I like the non-RA ratios better personally. You get the same 5th ratio for highway cruising and closer ratios overall (than stock). There's also less of a gap between 1st and 2nd than stock which I like. I still have a totally stock trans, but will consider the non-RA gears if/when the time comes.

-my 0.02

edit for calrity
What's calrity?
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Old 12-13-2004, 07:47 PM   #5
e28fixer
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Clarity.
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Old 12-13-2004, 10:25 PM   #6
ElJefe
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I thought that the sti ra and non ra gears were the same ratio, except for 5th. On the non ra gearset 5th was the same ratio as the us wrx and the ra gearset had the closer ratio. Am I wrong??
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Old 12-13-2004, 11:55 PM   #7
LVSUBARU
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Are the RA gears stronger?
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Old 12-14-2004, 12:13 AM   #8
majmun
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Quote:
Originally Posted by LVSUBARU
Are the RA gears stronger?
I would say they are less likely to break. They are shorter, which should mean that they see less torque than the longer ratios of the standard set.

The standard set gets an uprated dual-cone synchro for first and the RA's don't. But, first gear in the RA set is longer, so the synchros don't have to do as much work. It really comes down to ratios. Decide what ratios you want and get the appropriate gearset. They both have benefits and drawbacks.

Last edited by majmun; 12-14-2004 at 12:19 AM.
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Old 12-14-2004, 07:36 PM   #9
ebeck
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On the 2.0 the closer gears are fantastic. Shifts between are gears quick like a motocross bike and you stay in boost much better. Very fun to drive. Especially with the US motor.

Everything is a compromise. Fuel economy will suffer. I get 15-16 mpg. Worth every penny. Not so with with the 5mt for me. 6mt or Gears and diffs should be the first mod. The car is so much more enjoyable.

good luck with your selection.
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