Turn-in oversteer

[StephenH]

Now that I am settling into the Europa I want to start thinking about some setup tweaks and closing the gap on the competition.

One thing I have noticed is that on initial turn-in there is a feel of light roll oversteer, then the car settles nicely.
Not scary, just slightly disconcerting at times.
Car is on adjustable springs and dampers with adjustable rod ends, so plenty of scope for simple tweaks.
No rear roll bar.

Before I get too carried away I am looking for a baseline setting for rear wheel alignment if anyone can provide a known (good) reference.
Tread face is wearing pretty evenly so nothing wildly out of the envelope.

Thanks in advance.

[jbcollier]

Baseline? Start with the factory settings.

S1/S2:

http://www.lotus-europa.com/manuals/s2work/tech/index.htm#k

TC/S:

http://www.lotus-europa.com/manuals/tcwork/tech/index.htm#k

[StephenH]

 

However, I will revise slightly.
Before I get too carried away I am looking for a baseline setting for rear wheel alignment if anyone can provide a known (good for track use) reference.

Maybe the standard factory (road use, standard suspension) setting is fine, but happy to explore some direction from others pain

[Mecky]

Hi Stephen,

I never experienced any oversteer while turning in to a bend. Maybe because our car has 9" rear rims. Sometimes I had a tiny bit of oversteer at the exit of the corner. But thinking about correcting that was enough as long it was dry. Our wet tyres were not the best. Softer ones are necessary.

We set up our suspension like it was recommended by Jensens competition manual.

Best regards

Stefan

[jbcollier]

http://www.lotus-europa.com/manuals/misc/jensen.pdf

[StephenH]

Thanks, I'll check a few things against the Jensen manual.

When I say 'roll oversteer', it is fairly mild and hasn't led to anything scary, just 'feels' a bit loose as you turn in.
Car is currently fairly supple on suspension as it is used mainly on public roads and road courses, not smooth racetracks.
might be able to tune out with damper adjustment. Will stick the car on the alignment table near work and have it measured up accurately first.

Actually Stefan I was going to contact you as it was planned for me to be in Belgium next week, but that has been put off for a while, next time maybe.

[Valerio Leone]

I had the same problem and then it turned out I was losing a wheel...
I had to replace the hubs and stub axles.
 

[StephenH]

That bit I have checked, several times
The wheels are still firmly attached to the suspension.
Actually I replaced the axle nuts and checked for float only last week.

[jbcollier]

Interesting reading in the comp manual: " It is recommended that the stub axles be replaced after three practice and race sessions as a precautionary measure."

[Serge]

I have talked this over with Richard at Banks and he recons if you install them properly they will stay on. He races with them regularly and says that it isn't a problem for him.

He installs everything, torques it all down without loctite to seat it properly. Then takes the nut off and then loctites the nut on. But you have to make sure that your spacers, hubs and stub-axles are in good condition, if there is any play in there, you are going to get problems.

Serge

[Valerio Leone]

I would recommend to buy a well done American stub axles and hubs alligment conversion.
It is for sale on e-bay.
It's pricely but it works damn good!
It's a litte investment on safety, we should bear in mind we are driving a kind of plastic torpedo after all.
Serge, this is even more important if we will have 160hp on our back...

[Serge]

Valerio,

I've seen the kits on ebay, they look nice! Do you have these? If so, did you have to send your stub axles to them?

Serge

[Valerio Leone]

Of course I have that kit.
I really recommend to buy it for competition cars!!
you have to send to them your stub axels and the alluminim hub carriers.
They will give you back the conversion ready to fit with new bearings.
ciao
V

[Mecky]

Sometimes I had a tiny bit of oversteer at the exit of the corner. But thinking about correcting that was enough as long it was dry.

I experienced it yesterday again. I don't even have to think about correcting. It straightens out by just staying on the throttle.

[Valerio Leone]

I am wearing dunlop racing.
With those tyres I ve experienced many times what it was called "four wheels drift".