slate blue

Has anybody considered a quicker ratio steering rack? Or thought that this would be beneficial? The 928 is a bit more than 3 turns lock to lock, modern front engine Ferraris are closer to 2. So essentially 1 less turn or 50% more responsive. This may all not be positives of course. Maybe it makes it to sensitive but I doubt that for track use.

So all that should be required is an aftermarket rack and pinion fitted to the housing. A group buy should make it quite economical if there was enough interest. Just tossing it into the pot to see what the feedback is.

Greg

littleball_s4

I´m a big fan of direct racks. Sort of improves driver's skills automatically, only drawbacks are, depending on the driver, more attack is temporary induced (more tire wear and less lap-times consistency). Good things are, less effective reaction time, more info on the steering wheel (all other factors not changed). Both things are really important and beneficial.

I'm NOT in for a group buy because I'm far too amateur for that stuff. I've had hundreds of things to do before in my semi-track car.

There are many good racing steering racks available, it's just a matter of choosing the parameters, and making the adapters. But I warn you, the things are really expensive. 3000$ for a good one would not be crazy.

Just FYI, a 360 challenge (track version) has 2 turns or less, but more or less the same ratio as a stock 928. It just turn very little.

Regards,

mark kibort

buy a smaller steering wheel

Hey, in a race car on even a tight course, you will NEVER turn the wheel more than 180 degrees. unless you are drifting or in the snow, but that aint road racing!

littleball_s4

+1.

It's not a cheap mod for non-100% pro racing. Steering wheel is waaay cheaper

However, At least in my experience, you don't have to suffer "arm twisting" to benefit from a faster rack. Drivers were convinced it was good only after they try it, nobody could see beforehand how a faster rack would help.

Regards,

slate blue

By Littleball
I have no idea of a price, a small steering wheel is not the same, it is the amount of degrees not the amount of movement. I would approach it on the basis of having a CNC program written and then we pay for machine time. That way the IP is owned by the group not the merchant.

The ratio is not the same as the Ferrari you quoted, the turns lock to lock give an idea of that. The steering ratio for the 928 is known, I did have it but can't find at present the ratio for the Ferrari 599 GTO. I will search for that when I get a moment.

I do agree that most wont commit till they have tried it. 180 degrees is quite a lot and I don't think you would have the same feel when on the arm twisting limit.

Greg

Imo000

Isn't it easier to control a car with a lager ratio? Having a smaller wheel is like cutting down the gear shifter. It's not a closer ratio but it does makes it feel like it.

Lizard928

I looked at this for a long time. All the racks that I could find had more turns lock to lock.

RyanPerrella

Try Quaife

I believe they make racks or differing pinions to go what your after. Wether or not they make one for the 928 is another story. But I recall them having nearly as many steering rack options as ATB options in their catalog.

slate blue

Guys what I am talking about is just having 2 pieces made and fitting to the existing casing. There is custom rack makers in the UK because of their racing industry. I could have tried them but that is of no interest and that is a complete replacement and will be expensive. A 599 GTO rack will have less turns, I think it is 2.2?

Greg

mark kibort

Its fine. The fastest 928s in the world have no complaints of the sterring ratio. In fact, just check out this latest video and see if there is too much movement for your pro like goals.
Mk

http://www.youtube.com/watch?v=aJd31du0UUQ

Ispeed

Why not just relocate the tie rod end closer to the center of the wheel hub with something cnc machined, then use rack spacers so it won't go too far? This might allow for a flatter tie rod on lowered cars.

90 S-4

I used one of these made by " Howe Racing" I was very
satisfied with it.

http://www.howeracing.com/c-446-steering-quickener.aspx

90 S-4

It wasn't on my 928, it was on a BMW I had ..

mark kibort

one thing that is nice about a slow ratio, is that it is more forgiving. not so much as to desensitize, but enough to give you a little safety margin for error. I even noticed a little difference going to a smaller steering wheel. sure, you dont change the degrees of rotation, but you do change the distance and THAT is most important.

Dave928S

I agree with Mark on the rack ratio. I've tried different rack ratios and wheel sizes at hillclimbs and pro tracks here in Australia and I always kept coming back to a more forgiving ratio and wheel size on cars I drove.
I tried smaller wheels ... but ended up coming back to larger stock sizes because steering input was just too severe and touchy when I was on the absolute limit. More direct rack ratios were the same.

You don't use all the rack on a 928, and you could have a smaller wheel and a more direct rack ratio ... but it wouldn't suit me.

I guess it boils down to individual preference and driving style ... but I like the standard 928 setup ... even on really tight multiple switchbacks.