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Author Topic: Understeer  (Read 618 times)

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Raeturbo

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Re: Understeer
« Reply #15 on: 10 July 2018, 08:42:55 »

My first move would be to get rid of the toe in and set neutral. Is the camber adjustable on these cars?
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Doctor Gollum

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Re: Understeer
« Reply #16 on: 10 July 2018, 08:53:00 »

Zero toe is what WIM suggested for mine when it had vertical poly bushes. Rest of settings remain unchanged from Omega recommended  :y
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Migv6

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Re: Understeer
« Reply #17 on: 10 July 2018, 13:18:01 »

Yes, camber is adjustable.  :y
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Raeturbo

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Re: Understeer
« Reply #18 on: 10 July 2018, 14:27:51 »

Good maybe a little more camber then too, and as said adjust tyre pressures. I would think those tweaks will make a nice difference
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TheBoy

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Re: Understeer
« Reply #19 on: 10 July 2018, 18:15:37 »

My ex plod was always run at fully loaded pressures... 42/48 iirc.

If it did understeer, then it was not enough to cause concern when pressing on, regardless of dry, rain or snow ;)
Errr, your white estate? That understeered like, well, and Omega.  On the plus side, because you used pretty crap tyres that were pumped up to 10m psi, it just slid all over the place, partially hiding it into a drift...   ...or did when I drove it at Wycombe.  "Pressing on" wasn't really possible I found.
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Re: Understeer
« Reply #20 on: 10 July 2018, 22:18:41 »

I never found that with it ??? Certainly never felt like it was about to let go. Sure the estates do wallow a bit when pressing on which might explain your impression :-\

I honestly thought that set up was a vast improvement on bushes... It was a bit trial and error though, but if it didn't corner properly, then I would have tried summat else.

Don't forget that I used it as a taxi with that set up :y

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Muroman

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Re: Understeer
« Reply #21 on: 11 July 2018, 07:48:01 »

Front 42, rear 44 psi.

I'm a race driver but I somehow think Omega is more complex than a tubural frame racing car, maybe the basics are the same but I believe we have exact Omega experts here :)

It will turn in sharp with high speed but once in corner it starts to understeer. It will also understeer when low speed and full throttle.

I'll get a better angle meter today or tomorrow so then we will have some results  :y
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ajsphead

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Re: Understeer
« Reply #22 on: 11 July 2018, 08:17:19 »

If it's any help, I get very little understeer from mine relative to the big barge heavy engine it'll never be a sports car principle. Camber and toe as DG has said, Eibach -30s and Bilstein B4s with polybushes 32 psi front 34 rear on standard size 17" tyres.

I only get low speed full throttle oversteer, never understeer and gradual mid corner application of throttle causes the front to slightly tighten unless you are doing stupid speeds relative to the turn in point. I'd suggest softening it off but getting rid of the standard springs as they are designed for all round comfort and if old are probably knackered.
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Kevin Wood

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Re: Understeer
« Reply #23 on: 11 July 2018, 09:38:42 »

I'm a race driver but I somehow think Omega is more complex than a tubural frame racing car, maybe the basics are the same but I believe we have exact Omega experts here :)...

The thing is, the Omega is no double wishbone setup. Once the suspension starts moving in a dynamic scenario, the angles probably bear little resemblance to what you've achieved with a static setup because the mcpherson strut arrangement is compromised. In addition, the monocoque is probably a bit more flexible than a sports car's spaceframe and you have big, flexible bushes supporting the suspension components. The principles that you apply to setting up a race car probably don't apply, at least not in the same way, so a bit of trial and error is needed, and you probably need to think more about how the suspension moves when loaded up than how it's set up in a static sense.

I've always found mine (standard MV6 LSC setup) to handle pretty neutral but then I don't really find it a fun car to be driving right on the limit (I have a Westfield for that).
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Doctor Gollum

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Re: Understeer
« Reply #24 on: 11 July 2018, 10:10:23 »

Perspective is a wonderful thing  ;)

Leave the camber. Adjusting that will have little more effect than killing tyres. That said once you zero the toe, camber will need adjusting again as the geometry is three dimensional...
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henryd

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Re: Understeer
« Reply #25 on: 11 July 2018, 10:33:19 »

Front 42, rear 44 psi.

I'm a race driver but I somehow think Omega is more complex than a tubural frame racing car, maybe the basics are the same but I believe we have exact Omega experts here :)

It will turn in sharp with high speed but once in corner it starts to understeer. It will also understeer when low speed and full throttle.

I'll get a better angle meter today or tomorrow so then we will have some results  :y

Another thing is mass,the omega is heavy and will behave/react differently to a lightly loaded racer
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Muroman

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Re: Understeer
« Reply #26 on: 11 July 2018, 16:22:53 »

Okay so I don't know what had I measured but I had 11mm toe in... Well changed that to 2mm toe in. Tested and it was better but then I changed camber from 1.1 degree to 2.2 degree. Now it goes good. Ofcourse you can make it understeer but now the understeer is correctable with throttle.

And also tested toe out but that made the car jump around on the trails so changed that back.

I'm happy for now but I could buy new suspension parts, might even need to give up with the self leveling.
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Nick W

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Re: Understeer
« Reply #27 on: 11 July 2018, 16:36:16 »

Okay so I don't know what had I measured but I had 11mm toe in... Well changed that to 2mm toe in. Tested and it was better but then I changed camber from 1.1 degree to 2.2 degree. Now it goes good. Ofcourse you can make it understeer but now the understeer is correctable with throttle.

And also tested toe out but that made the car jump around on the trails so changed that back.

I'm happy for now but I could buy new suspension parts, might even need to give up with the self leveling.


If you've really set the camber to 2.2, you'll be buying tyres on a monthly basis!


1.1 of negative camber at ride height is what you want, and you ought to measure it more precisely.
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Doctor Gollum

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Re: Understeer
« Reply #28 on: 11 July 2018, 16:49:23 »

Okay so I don't know what had I measured but I had 11mm toe in... Well changed that to 2mm toe in. Tested and it was better but then I changed camber from 1.1 degree to 2.2 degree. Now it goes good. Ofcourse you can make it understeer but now the understeer is correctable with throttle.

And also tested toe out but that made the car jump around on the trails so changed that back.

I'm happy for now but I could buy new suspension parts, might even need to give up with the self leveling.


If you've really set the camber to 2.2, you'll be buying tyres on a monthly basis!


1.1 of negative camber at ride height is what you want, and you ought to measure it more precisely.
And set toe to zero... ::)
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TheBoy

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Re: Understeer
« Reply #29 on: 11 July 2018, 18:16:49 »

It will turn in sharp with high speed but once in corner it starts to understeer. It will also understeer when low speed and full throttle.
Exactly my experience, and cured vastly improved by front springs (only) as I suggested above, but it can make the back a bit skittish under my idea of heavy braking at my idea of high speed if you have and steering angle on.
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