Geoff Toyota Aurion

Aurion Series 50 – Understeer FIXED - Upgraded adjustable rear sway bar FIXED - Harsh rear suspension FIXED.

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Aurion Series 50 – Understeer FIXED - Upgraded adjustable rear sway bar FIXED - Harsh rear suspension FIXED.

 

I guess anyone who owns an Aurion Series 50 (2011 to 2017), knows about the understeer, nothing fixes it. Until now. Just had installed

1.    Control Arm Lower-Inner Rear Bush Kit - Double Offset (too create more caster)

A Double Offset kit is used for enhanced handling performance and will deliver positive caster to both sides of the vehicle. The vehicle will have improved directional stability, crisper, more responsive steering and improved 'return to centre' feel. This is a non-tyre wearing geometry change that has a substantial effect on a vehicles handling characteristics.

 

https://superpro.com.au/find/superpro-suspension-parts-and-poly-bushings-for-toyota-aurion-2011-on-acv5-gsv5-/cid-999501509

 

2    For those who hate the understeer as much as I did, knows that getting an up graded rear sway bar is nearly impossible. Until now. I have just had my rear bar of 16mm upgraded to an adjustable 22 mm. The company builds sway bars in Aust. They put 21 mm on the TRD but chose to go to 22 mm on my stock Presara. The difference is beyond belief. Many would know that the back ends on Series 50’s always felt weird, it felt like the shocks worked hard all day and tyre pressures needed to be lower than normal just to be comfortable. ALL FIXED. The whole car drives, corners and balances so much better.

 

Drive Industries at Somersby, near Gosford made it happen. https://www.driveindustries.com.au/ Talk to Doug or Andrew to make your ride go like it should have from the day it was made.

 

The thing that impressed me the most at Drive Industries was their PASSION and PRIDE at every stage or the transformation. Be warned, this will sound ridiculous but the car goes faster on the same foot throttle position. Watch the speedo. It’s smoother and with less rolling resistance. When their amazing wheel aligning machine can set up zero THRUST through the centre of the vehicle it changes everything.

Aurion Rear 22mm Adjustable.jpg

Edited by Geoff Toyota Aurion
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Wow ! What an entrance Geoff. Hello and welcome to the Forum mate.

I must say that I wasn't aware of any understeer issues associated with the 50 as I don't drive it hard. I pussy foot it around to quite honest so I don't degrade it prematurely. But It would be plausible with all that weight over the front axles for it to understeer. I did recently post up a thread to ask if anyone had done a poly bushing upgrade because I have noticed my left front wheel always goes out of whack and this tyre wears the edges out far more than the right. I then have to do the tyre swap dance, left to right, then eventually front to rear to maximise the life cycles. Usually two fronts to one set of rears.

I do hear you though on the rear, being unweighted too has some definite peculiarity to it, especially when the tyres wear and get harder with age AND with the alignment always seemingly going off. 

I would definitely be interested in the kit. I could install it myself but then I'd have to take it to Gosford to have it adjusted and aligned. Gosford is quite a hike from Western Sydney.

What sort of money are we looking at for this ? ( you can send me a p.m. if you like)

Do you have more pics you can post up ?

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Hello Tony

Thank you for the welcome. My ride has very low kms and I always felt that left and right hand turns that happen at traffic lights always needed a lot more steering wheel action just to go around the corner. Initially I thought it may have been the type of steering system. I experimented with tyre pressures – no real advantage there. I put four Michelin’s on and that made a difference but not as good as I had liked. The tyres are now at 32,000 kms and half worn, running 36F/32R and wearing flat. A little outside edge and inside edge wear on the F/L. As the tyres are now half done the right-angle corners were showing up even more to understeer or having to use a lot of steering wheel. Originally, I thought it was because my daily driver is a Subaru AWD and it’s just the feel you get with AWD. Makes sense. Wanting a solution, I checked everywhere and always suspected the rear sway bar. Aurion’s with no weight in the boot feel “wrong” in the back. Put 50 to 75kgs in the boot, between the wheels and the rear end feels “nice.”

Since I have had cars, every car has either had a rear bar installed or up rated, makes a world of difference. So that is what started the process and finding Drive Industries to manufacture a 50 series adjustable rear bar. They checked the car and found a split R/H side caster bush. At this point I would say, the car with just 63k’s, drove straight, never wandered and the steering wheel was always centred. Enter the new Caster urethane bushes, double offset, installed both in the lower control arms.

The transformation with L/H and R/H turns is remarkable with more caster out of the packet. Add an up rated rear sway bar and the grin is still on my face. Two front adjustable camber bolts were always part of the install, just to give the opportunity to a precision wheel alignment and as I found out, small adjustments in caster, camber and toe, front and rear make a big difference towards zero thrust through the centre of the car.

Open road cornering is flat and as precise as it gets and “apexing” the corners is just fun.

I have had wheel alignments, both 2-wheel and 4-wheel alignments done for centuries and many of my vehicles have been independent suspensions from way back with the Cooper S and the 240 (still two of my all-time favourites.)

Rather than quote my price, please give them a call. This firm makes things happen.

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16 hours ago, Geoff Toyota Aurion said:

The transformation with L/H and R/H turns is remarkable with more caster out of the packet. Add an up rated rear sway bar and the grin is still on my face.

Very interested to see a follow up post in a few months time to see whether the grin is still there or even wider.

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17 hours ago, Geoff Toyota Aurion said:

Rather than quote my price, please give them a call. This firm makes things happen.

Not even a ballpark ? Do I have to be seated for the price ?

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On 6/9/2020 at 6:39 AM, Tony Prodigy said:

Not even a ballpark ?

This post has been on my mind about how this outlay would have improved the driving experience.

I have previously considered a rear sway bar but not gone further. This time I did a bit more research and an internet comment about upgrading sway bars was like a band aid approach for worn suspension got my attention. It is not applicable for Geoff's vehicle. However, I am sure that it would be relevant for my Oct.2006 Aurion ATX now at 215K on the odometer and I know that the car has a lot of rear body roll through a roundabout. 

I also like apexing corners.

I have just order a set of front and rear standard height King springs and a set of Sachs shock absorbers for a total outlay of $950 using 3 different sellers. I have also got some adjustable camber bolts [previous purchase] so might as well fit them to both front and rear.

Certainly expecting that body roll to be greatly diminished and hopefully not need to also upgrade the rear sway bar or fit a front strut bar.   

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1 hour ago, campbeam said:

I also like apexing corners

Haha, I drive like that too Ashley.

I have to ask though, back on the subject of suspension, what condition are your bushes in ?

I think I'd start with replacing all the bushes before doing the shocks or perhaps just do the whole lot when the time comes. I'm on the hunt for a decent press to have on hand and have all the appropriate tools ready to be able to carry out this work. Doesn't seem like a hard job, just a bit fiddly i reckon and maybe some cursing in there for good measure too :laugh:

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1 hour ago, Tony Prodigy said:

what condition are your bushes in ?

I think I'd start with replacing all the bushes before doing the shocks or perhaps just do the whole lot when the time comes.

As far as I can tell the bushes are in good condition. I have been meaning to reinforce them using Sikaflex so will add them to the list.

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On 6/5/2020 at 11:21 AM, Geoff Toyota Aurion said:

" it felt like the shocks worked hard all day and tyre pressures needed to be lower than normal just to be comfortable."

 

What exactly do you mean ? What was uncomfortable about the stock setup ?

 

 

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Hello ZZT86

Thank you for the question, a little background. The car is a 2013 with about 63K’s. The suspension felt tight all over and many of the suspension components still have the manufacturing stickers on them from the factory. The car always understeered at L and R traffic lights. In a straight line or when cornering on uneven surface the back shocks seemed harsh, something that has been said in previous posts. So, I dropped the tyre pressures. The car runs empty all the time, nothing in the boot. As soon as the boot is loaded or 40 to 70 kgs put in the boot between the wheel arches, the harsh feel goes. I didn’t notice it when we bought the car at 31K’s two years ago, because I sat in the back during one of the test drives. When driving without anyone in the back seat, the shocks or tyres seemed to go, bump, bump, bump at every opportunity over the smallest crap road surfaces. I also noticed that the sway bar directly linked to the half way point up the struts/shock absorbers, a little different to traditional sway bar set ups that link to the trailing arms in many cars.

I started to wonder if the rear sway bar maybe too soft and there may have been a rebound type of action. Think of playing a piano, using two fingers. One finger on each key (side by side) and just tap on the keys, one finger up, one finger down and continue. Think now of the possibility that these were the two rear shocks, going up and down with no sway bar. Now add a soft sway bar and the result is basically the same. Now add a stiffer bar and the shocks don’t go down as far in the travel. I read a couple of reports about people who put a 19mm bar on the back and they said it was better. I was given the opportunity for a 22mm bar to be made, and it made all the difference. In the three random google photos, notice the back wheel how the shock is extended during cornering, one off the ground when the car is in ‘hurry mode.’ A lot of travel happens with a lot of compression on the opposite side of the car.

Got me thinking that maybe the shocks were working hard against the sway bar and there was a type of bounce back, not in this driving style but just round town mode.

In any case I put the 22mm bar on and hey presto the harsh bump, bump is gone, the cornering is amazing and with the urethane caster bushes, all the understeer has disappeared. The car is completely different. Oh what a feeling – still smiling.

Car 1.jpg

Car 2.jpg

Car 3.jpg

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Nice write up!

I've got a 2012 GSV50 Aurion Touring and wanted to share some mods.

I bought an Ultra Racing 19mm rear sway (UR-AR19-159) bar last year or year before, it was about $314 delivered (Sydney to Melbourne).

The same bar fits on the 50 series camry, https://ultraracingaustralia.com.au/product-category/toyota/camry-aurion-xv50-asv50r-gsv50r-avv50r-11-17/ comes with the stronger polyurethane bushes. Took about 3-4 weeks delivery, not sure how it will work with COVID atm.

Other mods:

  • Upgraded brakes to 2 piston kluger, pretty much straight swap of caliper + new disc and pads following a guide that was on this forum? I think.
  • Running bendix rotors / qfm pads.
  • Have KYB shocks all 4 corners
  • Springs have been changed to King Spring Low (~25mm drop), only really scrape on super steep driveways
  • Running Bridgestone S007a (changed tyre to 225/50/17 from 215/55/17 on stock rim) - Don't recommend going to a lower profile unless your car is lowered, the car looks funny, really big wheel gap.
  • K&N filter - (with drilled holes in airbox for more noise, very obvious on WOT) doesn't do too much.. but has nice induction noise

I've owned since the car since 2017, did the upgrades slowly over ~16 months (did installation of the bar/springs and shocks in my garage), the 19mm rear sway bar wasn't that great on it's own, but once I had new shocks + stiffer springs and better tyres, it's definitely a lot nicer to drive.

Had a trip to the Yarra Ranges in Victoria last year with a few mates who had some pretty quick cars (2013 Megane RS265 / 2011 wrx) and through the hilly parts, there was no problem keeping up within the 90-100km/h+ zones.

Obviously at higher speeds they'll pull away, but keeping it within the country speed limits through the sweeping corners, they found it hard to pull away (did most of the hilly parts in 2nd/3rd gear, used about 20L/100 lol), 80-120km/h was very similar for all 3 cars. 

I'll definitely be seeing how much it'll cost for the double offset kit, probably last thing I do to this car before I give it to my wife and I move on haha.

115390874_772224980214683_6502294264729074213_n.jpg

116262766_298018801401878_1418407609122675344_n.jpg

Edited by yoshi2015
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I did a previous post in early June saying that I would be replacing/upgrading the struts and springs rather than upgrading the rear sway bar. Front struts arrived very quickly. KIng springs took longer because they were a special order and they arrived. Well Karma must have decided to get involved and it has taken about 6 weeks to finally get the rear struts. 

During this wait period, I ended up going to wreckers and getting a rear sway bar off of a Sportivo; cost $50 and 2 hours time to remove. It has the same 16mm diameter but the bar is solid not hollow. In the meantime, I have been enjoying the improved handling with reduced body roll.

Looks like I will be leaving the upgrading of the struts and springs for a bit longer and wait for warmer morning weather without any wind.

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