More questions. Why? Because racecar (hopefully some day when it's finished).

I would like to run a custom light-weight steering column setup mounted to my roll cage, but I am wondering how people incorporate the Steering Angle Sensor into this? Do you use the OEM SAS somehow?

For older Evo's without ABS this is not an issue as I think the SAS is not needed. However an Evo9 needs the SAS input for the ACD to function properly, correct??

Also, one more question so I don't have to start a new thread - if I run a Tilton or similar style floor-mount pedal box, does it still use a vacuum booster or would it only be manual, non-powered, brakes?? How does it feel compared to the stock brake setup??

Thanks for any help you guys can provide.

 

Just found it in the fsm. sorry for the confusion

 

Those Tilton setups look badass.

Would you go floor-mount or over-hung?

 

Hmmm If you start down that path of bypassing the SAS and pedals for alternative methods such as the ones used in the Uber builds, it's going to get VERY expensive. From what I recall, the ones that did the custom racks not only replaced the rack but had standalone ECU's, standalone diff controllers, etc etc etc to compensate for the "OEM stuff." Sorta like "if i'm going to get rid of OEM part 1, why not 2 - 10 related." Also remember that not only is the SAS in there but part of the ABS, steering lock which is attached to the vehicle security somehow electrically but I forget, and a slew of other stuff that will get "killed" in the process. Next on my list for your car would be a fuel cell or maybe a sequential.

 

Thanks for the info on the SAS, etc. That is what I was afraid of. I am planning on running a standalone engine management ECU, but I want to keep the OEM ACD controller and all the wiring/inputs for it. I guess I may have to pick and choose what is most important for me. The easiest and lightest solution would be to ditch the ACD and go back to a VCU transfercase, but I really like the potential tunability of the ACD.

Already been in touch with MakTrak and Holinger for quotes and info on the sequentials

I have thought about the fuel cell, but as of right now I think the stock tank is REALLY hard to beat for it's location. As low as possible and centrally located. Some sanctioning bodies would not allow a cell where the stock tanks mount, and I don't want to throw that variable weight out back. It will have much more effect on the handling of the car from full to empty when mounted out back. Plus it would take up realestate where my planned rear mount radiator is going to go

 

Sorry to triple post, but it might be useful.

https://www.evolutionm.net/forums/10540981-post244.html

Very interested in the pedal box, but from the rough measurements I've taken, I don't think the floor mount will fit. You'd have to be WAY back in the car to get the clearance you need to make it work. Seems like being that far back would make the car hard to drive, particularly if you went with a low seat position? The over hung pedal box though looks to be doable.

 

Curious what steering column you're looking to run? Im trying to debate between stock or aftermarket but can't find an aftermarket brand to start with to save me. Must be searching in the wrong areas.

Edit: Actually just found the Woodward column. Would like some other ideas if you are looking at a different brand. Thanks.

 

"Aftermarket" in this case generally means custom built.
It usually amounts to a chromoly hollow shaft, a collapsible section, and some bearings mounted to the cage. If you want to get fancy, you can do an outer housing too for mounting things to.
Something like this:
http://www.howeracing.com/p-7412-col...ng-column.aspx
http://woodwardsteering.com/images/s...%20columns.pdf

 

I cut out the steering lock and all the brackets from the stock column so that it was nothing but a tube, the bearings, and the shaft. Then I triangulated the column into the position I wanted. I was able to re attach the sas buy positioning it onto the column, then welded a small tab to keep the sas from spinning. It worked perfect. If you need a pic let me know.

 

Being triangulated and hard mounted, would it meet the requirements of being "collapsible" as most rule sets mandate? I looked at your pics and am planning something similar, but it doesn't seem like it would be legal.

I guess with enough force the c-clips that locate the center shaft respective to the outer tube would shear, then that inner shaft could move inside the outer tube and collapse??

 

NASA nor pikes peak had any rules about a collapsible steering column. i've never actually seen that rule before, because even in SCCA with the FSAE cars the columns were always hard mounted. even the OEM column isn't collapsible. there are 4 12mm bolts holding it to the dash bar, and if it broke loose the airbag would be worthless.

 

Old thread, but thought I would post up anyway.

By "collapsible" they are talking about the steering rack being able to push up without it pushing the steering column around. The stock column absolutely is collapsible. The steering column is made up of a shaft that can slide into the steering shaft tube. This assembly is then bearing mounted into the steering column. In a wreck, if the steering rack was pushed into the firewall, it would not cause the steering shaft to push towards the driver, potentially breaking the steering column free from the dash bar.

 

Thanks for the clarification. I did finally come to understand this over time. Originally I thought the "collapsing" was done on the steering wheel end if the driver hit the wheel too hard. But you are right, it is in case of a front end impact to keep the steering shaft/wheel from being pushed into the driver.

 

In that case was a suitable piece made or found to work with the sas?

 

Going to use the stripped OEM steering shaft with either OEM or fabricated mount for the OEM SAS. . .

An ultralight aluminum setup would only save a couple pounds over this. . .

https://www.evolutionm.net/forums/10540852-post154.html