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Steering ratio on Impreza


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10 replies to this topic

#1 edrach

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Posted 19 January 2013 - 07:45 PM

I checked the steering on my Impreza and it is 3.2 turns lock to lock. For rally purposes, I'd like to get it to around 2 turns lock to lock. Any models of the Subaru that have a quicker steering ratio? Or can one modify the rack and pinion to get the desired ratio?

#2 Fairtax4me

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Posted 19 January 2013 - 08:47 PM

No modification without having a new rack and pinion custom machined.
What year and model Impreza do you have? A WRX or STI may have a closer ratio.

#3 bratman18

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Posted 19 January 2013 - 08:51 PM

I know STi is an upgrade for most, but I'm not sure how much of an upgrade it is.

#4 987687

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Posted 19 January 2013 - 11:00 PM

According to cars101, the 05+ sti have a 2.6 turn lock to lock steering ratio.
Probably 04 as well, but the way cars101 is laid out is a bit funky for the impreza. But it does have that listed for the 05 and 07.

#5 1 Lucky Texan

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Posted 20 January 2013 - 12:32 AM

yeah, I was thinking the 06 WRX got a faster ratio than previous WRX - not certain.

#6 Caboobaroo

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Posted 20 January 2013 - 07:04 PM

But they won't bolt in. 2005 was a major design change in the way they mount to the engine crossmember. 2004 STi will be the closest thing to a bolt in without buying a Q-Rack.

#7 edrach

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Posted 20 January 2013 - 10:27 PM

According to cars101, the 05+ sti have a 2.6 turn lock to lock steering ratio.
Probably 04 as well, but the way cars101 is laid out is a bit funky for the impreza. But it does have that listed for the 05 and 07.

I went to cars 101 but neglected to do years other than my 2002 OBS. It didn't have any info; I tried a few other years also but didn't get into the STi or much newer cars.

#8 JRachner

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Posted 20 January 2013 - 11:17 PM

All 93-05 imprezas have a 16.5:1 steering ratio
The 04-07 STI and 06/07 WRX have 15:1 steering ratios

Subaru changed the design of the crossmember and steering rack in 2005/2006.

So the only 15:1 ratio rack that will bolt into any 93-05 impreza, is the 04' STI.
If you change the crossmember you can use a newer style rack.

(Any 02-07 impreza rack swapped into a 93-01 impreza will need a custom u-joint.)

#9 edrach

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Posted 21 January 2013 - 12:01 AM

I should have asked the kid first!!

#10 Caboobaroo

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Posted 26 January 2013 - 11:19 PM

What does this newbie know?

:-p

#11 edrach

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Posted 27 January 2013 - 02:29 PM

What does this newbie know?

:-p

A lot more than you think. I'm impressed. I've got a '06 rack and cross member coming for the upgrade.




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