C34 Wheels/suspension Help Plzzz

[kjb_r33]

As for steering geometry the effect of spacers is exactly the same as getting the "right" offset with no spacers.

The correct offset is more than having the wheels flush. Its about where a line drawn through the center of the tyre would intersect with a lne drawn though the centre of the ball joints. Moving the tyre inboard or outboard without using the correct offset moves that intercection point further apart ot closer together, further changing the scrub radius. Using a spacer will not correct the incorrect offset UNLESS it brings the incorrect offset being used closer to the original scrub radius.

The pulling affect is called bump steer.

[rasored]

would the scrub radius be pacified by adjusting the camber angle ?

not necessarily the standard camber setting !! , but a re-calculated angle to account for the offset change / or indeed lowering of the vehicle - different size tyres are said to contribute to the scrub effect .

I now run 25mm spacers on the front of my RSV4 S1 ET43 8.5" - and it was the best thing i did so far .....

Cured my horrible understeer .. and improved the look

I have adjustable suspension all round and I am low , BUT running standard caster / camber / toe in/out measurements .

However on uneven roads it dose tend to wander off .

So now i am wondering If another angle for the caster , other than standard , is worth a try ( $130 bucks a shot in UK !! ) this i would think may also include toe angle ? and may help with the original questions issue

[SNEEZYC34]

Well i spent hours taking the spacers off yesterday as the previous owner must have used locktite to put the nuts on.

Drove it this morning with no spacers and it still pulled when on uneven roads, spoken to the located mechanic and he is going to ave a look next week, i need new tyres anyway so gonna get new tryes and a wheel alignment saturday and go from there, eveeryhitng under the car seems ok, but im not a mechanic so im not 100% sure, i have new sway bar links and sway bar and sway bar rubbers but bushings etc at 150k old so could be anything. least i know its not the spcaers, and i can put them back on and try a few other things i guess

[KiwiRS4T]

The correct offset is more than having the wheels flush. Its about where a line drawn through the center of the tyre would intersect with a lne drawn though the centre of the ball joints. Moving the tyre inboard or outboard without using the correct offset moves that intercection point further apart ot closer together, further changing the scrub radius. Using a spacer will not correct the incorrect offset UNLESS it brings the incorrect offset being used closer to the original scrub radius.

The amount of offset is irrelevant. The act of moving the wheel (and tyre) out from the original, stock position changes the geometry and while it may be done mainly for appearance it also has the effect of increasing the track. Whether this is achieved by wheels with a different offset or with spacers the result is exactly the same. In my experience this change has no bad effect on steering or handling. In Ted's case he reports an improvement in that he has reduced understeer.

would the scrub radius be pacified by adjusting the camber angle ?

I have adjustable suspension all round and I am low , BUT running standard caster / camber / toe in/out measurements .

However on uneven roads it dose tend to wander off .

So now i am wondering If another angle for the caster , other than standard , is worth a try ( $130 bucks a shot in UK !! ) this i would think may also include toe angle ? and may help with the original questions issue

Yes a little negative camber (1 to 1.5 deg for the street or rather more... 3 deg for the track) will help. More castor (6 -7 deg ) will help with straight line stability particularly at speed. You will need adjustable castor arms to achieve the latter but you can achieve a small increase in negative camber with adjustable bushes. In either case you will then have to correct toe-in.

[SNEEZYC34]

So i was lucky enough to get my mechanic to ahve a look at my car today, Jon from Driven Motorsport in SA is amazing and knows his stuff and highly reccomend them to anyone in SA.

As i said in previous post spacers, didnt seem to be the issue.

Mechanic did a full check front and back, seems that previous owner cut the rear springs so rear is very soft, the rear sub frame bushes in the rear, are fine, but not the best and have a bit of movement, and could do with replacing.

so after getting new tyres this week will see how it goes =)

[coparts41]

Well I have had our Stagea for 6 years now and bought the car with Tein suspension , Rays Volts 18x8 + 32 with 235x40`s , 25mm spacers all around , 1 1/4 degrees camber front and back , lowered 40mm as well and have no issues . However it depends on many variables and in the end , who sets up the suspension.

Edited June 5, 2014 by coparts41