I tackled the steering rack riser plates today, I was putting it off a bit because I hear mixed things about how beneficial they actually are but also involves some time spent in the footwell which is never pleasant...
The steering rack attaches to the car through slotted holes in the front of the chassis, these slotted holes allow it to be fitted with approximately 8mm of vertical adjustment. The bolts are then supported by a plate which is riveted in place and has non-slotted holes.
My car with an OEM 130/130mm ride height came with plates fitted that placed the rack in its lowest position. For any factory car that launched with 120mm or lower ride heights, riser plates were fitted to move the rack up 8mm to shuffle the car back into the optimal area of the bump steer curve. Clever little design feature, makes for a very cheap adjustment when the plates are ~ £10 from [mention]seriouslylotus[/mention] .
I took my roof off and driver seat out to make room. Taking the wheel off would have been easier still, but I didn't bother.
Process should be:
- Drill out existing rivets
- Loosen both bolts in each footwell (4 total)
- Loosen the lower rack UJ pinch bolt just to allow movement.
- Remove the bolts from one side, the rack will drop down a bit.
- Remove the OEM plate
- Refit new plate with new rivet (3mm x 8mm seemed a good fit)
- Using a screwdriver in the smaller bolt hole you can gently raise the rack up a bit until the big bolt hole lines up. Refit the bolts
- Repeat on the other side of the car
- Torque up, don't forget the UJ pinch bolt.
I read some other guides that suggested the car should be jacked up, wheels removed, helper raising the rack manually through the chassis box section etc etc - but I didn't need any of that.
The job is less awful if you take all of your tools with you into the footwell first time around, and a few extensions makes the job significantly easier!
Old vs New:
Whether or not I'll notice a difference who knows, but they're in now - and I can't imagine there are any downsides to them.