Fitted ATB diff, massively increased torque steer.
Turbo Mini Forums

I was expecting some torque steer issues when bolting on a gt2056 but not with 96lb/ft from my current engine. The car is very skittish across the road if you nail it and frankly not that fun.

Suspension set up is fairly normal, 1.5 neg camber bottom arms, poly bushes etc. only issue I see is the deep dish 6x12's I have fitted, which could do with going in the bin for something with less offset.

As the car is pretty low, not sat on bump stops low but will fitting the standard bottom arms help, I will have to fit some rose jointed adjustable arms I think, but as I will be competing next weekend, have no time to get the suspension set up properly before then.

Will tweeking castor have any impact on reducing torque steer?

I feel that a number of small issues that have come together to create one larger one.

Thanks

James

Edited by minimole23 on 12th Jul, 2014.

From what I have read, they will highlight any small issues with your suspension setup.

You haven't been a retard like me and forgotten to tighten up the ball joints when fitting the quaife.

That was quite embarrassing.....

bump steer, corner weights?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

i corner weighted my car = torque steer gone

but i had an open diff so when only 1 wheel spun things got interesting

Yes i moved to the darkside

Instagram @jdm_brett

My car doesn't really feel to good with the ATB fitted neither, my suspension is spot on. However corner weights have never been done. My car feels 100% better with a passanger.

Edited by alaskanow0 on 12th Jul, 2014.

Class C 3rd Place Avon 2011 14.18 @101mph

Set your front tracking more parallel

I seriously doubt it!

yeap echoing the above....

if the cornerweights are off when the weight tranfers to the rear it the car will sit slightly lopsided putting weight more weight ( and hence traction) on on wheel causing ot to pull to one side,

also as paul says if the tracking is off the front wheels will fight each other, std tracking is basically a fudge for suspension flexibility, chances are you'll have uprated bushes so ther will be less flex so it will need to be set closer to parallel.

Which caster are you running??

This is the castor I'm currently running
Project car woes :(

I'm still getting a feel for my ATB equipped car so will reserve judgement.

As a starting point I have had my suspension set (very kindly by a TM member) to:-

Front
3.5 degrees positive caster
1 degree negative camber
2 degrees toe out

Rear
1 degree negative camber
2 degrees toe in

Feels better than the negative caster it was running! lol

If something is worth doing, it's worth doing half of.

My setup is more or less the same as Johns. However I have also tried more Caster, and front toe in / out and Parallel.

I've been on the look out for some corner weights. There's some longacre ones on ebay for £400 collected, but there in Norfolk. I don't fancy the 6 hour round trip.

Edited by alaskanow0 on 13th Jul, 2014.

Class C 3rd Place Avon 2011 14.18 @101mph

The trick is getting it the same either side at the front, any imbalance in the caster with make it torque steer.

John, does your car feel better? Lighter steering at least.

I think the real problem here though is the wheels. 6x12 are a great wheel, but the deep dish ones have a large offset and this just makes the torque steer worse.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Some useful info there, I will definitely be going shopping for some scales

The only way forward will be a proper suspension set up. The issue has improved now I have dialed in a load more castor, but at this stage its only guess work.

The only unknown settings are front camber by virtue of the fact I don't know what the effect of the lowering has had on it, and castor because Its never been an issue.

3.5 degrees caster is too little

3.5 is standard and works well. If you're thrashing round a race track then more would be better (assuming that you're using radials).

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

My mini could of won 'worst torque steer' if there was such a thing... just thought it was nature of the beast but bunged my normal tracking guy a tenner to 'check' it was ok.. lil adjustment and shocked was not the word! I can now floor it whilst holding with one finger

Much better thanks Wil!

If something is worth doing, it's worth doing half of.

Indeed, But power doesn't affect the suspension geometry

On 13th Jul, 2014 Vegard said:

On 13th Jul, 2014 wil_h said:
3.5 is standard and works well. If you're thrashing round a race track then more would be better (assuming that you're using radials).

On 13th Jul, 2014 Vegard said:
3.5 degrees caster is too little

A turboed Mini with an LSD is not standard

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

No, but power changes the needs of the suspension geometry. So does the LSD.

I take it he's not running 145R10s either..,,

Edited by Vegard on 13th Jul, 2014.

What would you suggest Vegard?

If something is worth doing, it's worth doing half of.

Interesting thread - I can hardly tell my ATB is there, maybe it's faulty?!