I am going from 16x7 stockers OE to 18x8.5 Bullitts soon.
Seems like the size of wheel installed from the factory limits the turning radius with OE installed steering stops. Pic from the 07 Ford Workshop Manual showing lock to lock on the steering wheel for particular Mustang models:
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Found on Fords website: For vehicles with 16" wheels from the factory: -installing 17" x 8" wheels, use steering stop 4R3Z-3932-BA -Installing 18" x 8.5" or 18" x 9.5" wheels, use steering stop 6R3Z-3932-CA For vehicles with 17" wheels from the factory: -installing 18" x 8.5" or 18" x 9.5" wheels, use steering stop 6R3Z-3932-CA
Question is - Anyone ever delt with installing these steering stops? What do they look like and how are they installed? Are they really needed? I never knew that Ford installed steering stops for larger OE wheels or that I would be needing them to install 18" OE Polished Bullitts. (18x8.5 50mm offset)
That 07 Ford Workshop Manual showing lock to lock on the steering wheel does not have anything to do with turning radius.
Sure it does. Same rack, same vehicle unibody, same reverse L lower control arms. Whats different? Not the steering rack from what I can find.
Different lock to lock specs on the same steering rack indicates steering stops. Ford part #s and reasons for installing stops indicates the same steering rack is being used between models. Ford indicates the same steering rack for the different models of the 05-08 stang. I crawled under a few different stangs yesterday and didnt see any different part #s for racks. Different lock to lock specs in the workshop manual indicates to me the use of steering stops. Anyone know FOR SURE?
Here is the only other steering rack I can find that Ford offers for the 05-08 Stangs:
3.13 Turns of the steering wheel to go from full left to full right turn of the 4.0L equipped Mustang
2.83 Turns of the steering wheel to go from full left to full right turn of the 4.6L equipped Mustang
2.60 Turns of the steering wheel to go from full left to full right turn of the 4.6L equipped Mustang w/18" wheels
2.60 Turns of the steering wheel to go from full left to full right turn of the 5.4L equipped Mustang w/18" wheels
The turning radius is how tight a turn the car can make. The smaller the number the quicker the turn. In other words quick ratio.
Yes I see what you mean. But there is only one steering rack part #, not 3 different part #s for three different racks with different ratios for S197s The only one is the FR500C quick ratio 15.6:1 for road racing. And the "steering stops" that I found that Ford recommends all exist and have part #s. I have yet to find but one part # for the steering rack.
ORIGINAL: wingman75 The manual indicates that it takes:
3.13 Turns of the steering wheel to go from full left to full right turn of the 4.0L equipped Mustang 2.83 Turns of the steering wheel to go from full left to full right turn of the 4.6L equipped Mustang 2.60 Turns of the steering wheel to go from full left to full right turn of the 4.6L equipped Mustang w/18" wheels 2.60 Turns of the steering wheel to go from full left to full right turn of the 5.4L equipped Mustang w/18" wheels
The turning radius is how tight a turn the car can make. The smaller the number the quicker the turn. In other words quick ratio.
That assumes the wheels are turning to the same ultimate angle, which they are not. The steering quickness is staying the same; the bumpstops are just stopping the bigger wheels sooner in the travel. That way they don't scrape on body bits & samage something, but also limits how tight the turning radius is.
That 15.6:1 I think is the stock rack, or very similar to it. The stock rack is 15.642 according to this: http://www.fordvehicles.com/assets/pdf/2005mustang_specs.pdf page 16 of 37 (or page 14 on bottom of page) has the steering info. Lots of really usefull info there!
< Message edited by SlideWRX -- 3/6/2008 6:55:24 AM >
That assumes the wheels are turning to the same ultimate angle, which they are not. The steering quickness is staying the same; the bumpstops are just stopping the bigger wheels sooner in the travel. That way they don't scrape on body bits & samage something, but also limits how tight the turning radius is.
That 15.6:1 I think is the stock rack, or very similar to it. The stock rack is 15.642 according to this: http://www.fordvehicles.com/assets/pdf/2005mustang_specs.pdf page 16 of 37 (or page 14 on bottom of page) has the steering info. Lots of really usefull info there!
I looked at that and it indicated the same rack and ratio for the V6 and GT platform.
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V6, GT and GT-500 turning radius difference - 
The steering quickness is staying the same; the bumpstops are just stopping the bigger wheels sooner in the travel. That way they don't scrape on body bits & samage something, but also limits how tight the turning radius is. 
