Changing the steering ratio

Yep.

Go to the next grasstrack/speedway meet near you. You'll see half the field use an epicyclic cluster from an overdrive unit or butchered auto box to up the gearing.

You simply weld or match on your appropriate column attachments and go racing. It's as crude as you get, but very effective.

You need plenty of room for installation though, as the units are typically around 150mm diameter.

Not really very "Ferraristic", but ingenious none the less.

Better off getting a rack/pinion built and a power steer specialist to adjust pump pressure/delivery accordingly.....not that hard.

 

Peter,

There is an optional quicker ratio rack for F355 Challenge. Issued in 1997 when the wing came out, it was part of the update package mandatory for continued participation.

• Wing
• Rack and new power steering pump to match
• Oil to air oil cooler mounted up front with ducted air from the driving light housing (replacing oil to water in the V of the engine)
• Removal of the headlight assembly and motors, replaced with housing shells only
• Alternate larger front and rear anti-roll bars

If you have those other components on your Challenge, you may also have the rack too. I don't have specific part numbers or specifications.

If you have the history of the car, you may find the information there.


Best regards,

Rob Schermerhorn

 

Like this? It's a 30% reduction so 2.75 turns goes to 1.83, but you need to cut it in.

http://store.summitracing.com/partdetail.asp?part=HRE%2D5220

 

mk e,
Any chance you know what splines the 3x8 series has?
I'd love quicker steering, even if the force increases.

 

Verell,
I don't know what splines are in the 308s. I don't have one of those, I just remember seeing them and it seemed like what Aircon was looking for.

I don't know know how big the gear box is. I'm sure it can be installed in any car if you're pigheaded enough, but I'm also sure it won't bolt in. The steering columb probably needs to be cut to fit it. I've see weld on splines in race chassis catalogs, coleman has these:

http://www.colemanracing.com/section/index.htp?id=56
http://www.colemanracing.com/section/index.htp?id=32

 

I purchased the quick turn rack and pinion set for my 308, from Superformance in the UK.
I had planned on installing it while rebuilding my steering rack last week, but I unfortunately injured my hand and have yet recovered enough to turn a wrench.