sway bar?

[neil d]

I run 250lbs in the rear and 400lbs in the front, the rear sway bar is connected by 2 zip ties. This is all in my 2f Na race car with a welded in cage.

Those springs are just way to stiff for a standard car.

a full set of king springs would be around $200.

Neil

[manga_blue]

I agree with CT and Neil about those rear springs being over stiff but there's sttill no harm in trying disconnecting the rear bar. I have Teins with 5kg/4kg spring rates on my NA. Removing the bar balanced it fairly well. From memory you've got 7/6 in the Tein Flex - not all that different proportionally from mine. Only takes 10 minutes to do and at least it'd be better than now.

[Nickb]

So maybe a plan of attack would be to remove the rear bar, give it a go, then look at softening the rear end and increasing bars front and back?

I'm not going to be able to do springs, bars etc n the next 4 weeks, so hoepfully this might suffice until after then...

[Nickb]

Starting to understand how this all works now, didn't realise the effect that spring stiffness had to whether the car oversteers/understeers.. Been playing with the FCM spreadsheet (thanks Phil!) can now see what you guys are talking about. Certainly explains a bit about how the car feels.... I'll take the rear bar off this evening and give that a go for the time being. Looks like it should help.

Thanks guys.

[NB8C]

Hey Nickb, at what speed does the car start to roll badly? I am trying to solve out the 'body roll\" problem with my 5 too...

btw, have u tried to play around with the tyre pressure? when you hv the suspension changed, you may need to have the right tyre pressure to match...

[Nickb]

It doesn't really have body roll. When it oversteers it feels like the back is rolling, but its more that it just moving around.... At high speed it feels pretty touchy.

Pulled the rear bar off this arvo and went for a quick spin, definitely feels better. See how that goes for a bit.

[manga_blue]

Once you get close with to FRC with springs and sway bars then you can fine tune with the adjustables you already have at hand: damper rates (tightening them at one end is like a small increase in spring or bar stiffness), camber (more negative at one end can give relatively more grip there), toe out and tyre pressures. Just vary them one at a time and make them incremental changes, not big steps. It's fun to feel it all come together.