AALAWS Posted January 24, 2018 Share Posted January 24, 2018 Hey folks, So I have investigated the option of fitting Rack and Pinion steering to my KE25 Corolla. With out delving uber deep into the science, I have ascertained that a AW11 MR2 rack, with KE70 brackets to mount it to the cross member, a KP starlet steering shaft and uni, and possibly some starlet outer tie rod ends.....it should work. I'm at the point where I need to make the decision in my build to do it, or lose it and keep the standard recirculating ball set up...... Is it worth it to convert it? what will the benefits be for a road car (with 20v Blacktop 4age)......is it worth doing it? Yeah nah? Quote Link to comment Share on other sites More sharing options...
Mr Vapour Posted January 24, 2018 Share Posted January 24, 2018 What would the difference be lock to lock. Quote Link to comment Share on other sites More sharing options...
AALAWS Posted January 24, 2018 Author Share Posted January 24, 2018 1 hour ago, Mr Vapour said: What would the difference be lock to lock. No idea....have no reference for this unfortunately Would that be the only real difference? the amount of turns of the steering wheel? Pic for reference Quote Link to comment Share on other sites More sharing options...
beachlander Posted January 24, 2018 Share Posted January 24, 2018 A mate has fitted it to anothers KE35, @drftnmaz, unsure how he did it but yea Quote Link to comment Share on other sites More sharing options...
drftnmaz Posted January 24, 2018 Share Posted January 24, 2018 I guess it depends what your using the car for, but a change to rack done correctly will make a much nicer car to drive IMO, and at a guess for a ke25 i think a starlet rack+housing+mounts would be about right for the bumpsteer, ke70 housing is ~1" wider so if anything you may need the starlet housing with the ke70 shaft inside, Quote Link to comment Share on other sites More sharing options...
ajg193 Posted January 24, 2018 Share Posted January 24, 2018 Do you get any road feedback with recirculating ball? Less slop with rack Quote Link to comment Share on other sites More sharing options...
AALAWS Posted January 24, 2018 Author Share Posted January 24, 2018 4 hours ago, ajg193 said: Do you get any road feedback with recirculating ball? Less slop with rack Last time I drove one was about 17 yrs ago so I can't say...... I assume a rack would be better than the standard set up, but just not sure if the gains will be worth the effort you know? Quote Link to comment Share on other sites More sharing options...
cletus Posted January 24, 2018 Share Posted January 24, 2018 A rack is more 'direct' feeling. However the biggest thing is getting the geometry correct. It is surprising how many people fit racks to improve handling, but end up making it considerably worse by not understanding how rack height/steering arm length etc all affects geometry I had a look at a car on monday that had a 1uz put in it and they had fitted a commodore rack to clear the sump. They had put the rack where it fitted, but it was too low, and it had 80mm of toe change from ride height to full droop. Another example on Tuesday of a charger with an aussie rack kit, its finally ok now the rack was lowered 20mm to correct the bump steer, previously it was about 50mm over its full range of travel fitted as per the instructions. Which is twice as much as a standard one has. 9 Quote Link to comment Share on other sites More sharing options...
Carsnz123 Posted January 24, 2018 Share Posted January 24, 2018 80mm toe change!? Jeasus that would be an exciting ride. Quote Link to comment Share on other sites More sharing options...
AALAWS Posted January 26, 2018 Author Share Posted January 26, 2018 I'm thinking I might put it in the "Meh" pile....... As a first build i've already got my hands pretty full. I found a pretty detailed break down on rolla club of a switch but it's using completely different parts (struts, LCA's, steering arms, non factory column and top end etc). I'll set it up as standard for now and if it ever gets finished I'll drive it a wee bit and assess again then. 1 Quote Link to comment Share on other sites More sharing options...
MaxPower Posted January 26, 2018 Share Posted January 26, 2018 please go ahead and put a rack in your ke25 so i know what parts to use in mine. the steering is the one thing i would like to address in my track car, just doesn't feel good at all, could be the wide tyres on the front though. Quote Link to comment Share on other sites More sharing options...
AALAWS Posted January 26, 2018 Author Share Posted January 26, 2018 5 hours ago, MaxPower said: please go ahead and put a rack in your ke25 so i know what parts to use in mine. the steering is the one thing i would like to address in my track car, just doesn't feel good at all, could be the wide tyres on the front though. Look up the one on rollaclub, it's pretty thorough, just different parts compared to my setup. The pic above is from another rollaclub post from a guy in Dunedin, he used all the bits I mentioned in the first post. 1 Quote Link to comment Share on other sites More sharing options...
cubastreet Posted February 11, 2018 Share Posted February 11, 2018 I think R&P is why I like driving my brumby so much. It's got the power of a kei, understeers like a Kia and rolls like a ketch in the corners, but the steering feels so direct I never tire of it. I say do it. Quote Link to comment Share on other sites More sharing options...
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