Bump Steer

[Craig!]

Who's adjusted the bump steer on their T350 and what route did you go down? I've heard several suggestions, just wanting to hear from people who've actually done it!!

1) Space the rack, flip the steering arms and mount them the other way round.
2) Fit Sagaris steering arms, any pictures showing the differences?
3) Str8six modification, anyone know what exactly this involves?

Any help is much appreciated.

[alex_gray255]

Suggest you look around on this forum a bit and the Tuscan one.

This has been discussed several times over the last few months alone - from memory.

As such, you could probably find the answers you wanted from there

[Craig!]

Had a look for T350 info and not found too many specifics, a lot of guys just seem to hand their car and their cash over to garages where as I want to get stuck in and do the work myself!

Is the Tuscan chassis and steering rack the same, along with the hubs, etc?

[plasticman]

I think you should measure it before you decide how to rectify it .

[Craig!]

Obviously, but whilst sat bored I'd rather be researching it and finding out ways to rectify it than watching tripe on TV.

Initial impression after driving the car is it needs a degree of bump steer correction and firming up the rear suspension.

[tail slide]

Craig! said:

Had a look for T350 info and not found too many specifics, a lot of guys just seem to hand their car and their cash over to garages where as I want to get stuck in and do the work myself!

Is the Tuscan chassis and steering rack the same, along with the hubs, etc?

Hi, I think I can save you some time with this.

I did - and undid! - a few things myself 18mths ago, eg raising rack (no space to raise enough to match Sag/Tuscan2!) while discussing it with Jason at STR8SIX amongst other little developments on my road/sprint T350. So Jason was also looking into it and funded himself a big batch of bespoke new steering arms, which we fitted and worked perfectly on mine (once I had then put the rack back down to standard height, changed toe-in etc) but as with anything that fundamentally changes the geometry he found it had to be set up carefully.
I then tested it thoroughly on track & road - as you probably know bump-steer can be difficult to isolate from following cambers etc which have very different causes, and I also logged tyre wear just in case which remained even across the tread.

To ensure that it works perfectly for other customers, he quite rightly will now only supply and fit them as a package, but at a reasonable rate (IMO). I'm all for DIY when possible, but this saves a lot of hassle and can't be replicated without the bespoke steering arms that drop the steering arms into the correct position to be as parallel as possible with the wishbones' arc of travel.

[Basil Brush]

Probably a stupid question but if they are bespoke arms to get the track rods to the correct position, why the need for rack spacers as part of the kit?

[Walford]

Basil Brush said:

Probably a stupid question but if they are bespoke arms to get the track rods to the correct position, why the need for rack spacers as part of the kit?

For fine tunning if you alter ride hieght
.

[Basil Brush]

I understand that the set up would ideally need fine tuning for each car, my point was that the kit includes 2 arms and 2 fixed height spacers. If the arms are bespoke to suit a standard ride height car, why not make the arm drop larger so the rack doesn't need lifting at all, given the lack of space above the rack on earlier cars?

[savroo]

this may help u see link, Cerbera BumpSteer fix.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...