So to lay it out: I'm building my Z28 to be a track/drift car, I'm keep grip & handling in mind but I want to also get her sideways. I've done my research on wheels for handling and most seem to agree 17's are great all around and 18's are best for just grip and handling, I've decided to run both; 18's for street and the track and 17's for goofing around and drifting. So my question is the steeing box. I've seen where other members have changed theirs out, and I am wondering what the best steering box ratio to go with? I know Flaming River (20:1) and AGR(12:1) both make upgraded steering boxes, and that cardone remanufactures all third gen boxes. I have and '82 Z28 with the stock 15's and to my knowledge the stock steering box. So yeah thats what I want know: which would be the best ratio for full turning radius on 18's and 17's?

 

12:1. I believe that is what came in the Z28 stock, someone correct this if I am wrong. Definitely a fast enough ratio to catch the slide.

The ratio has nothing to do with turning radius, however. The cars with 15" wheels had a slightly better turning radius due to smaller stops in the box, whereas the 16" wheel cars had bigger stops to prevent rubbing at full lock on the inner fender liner and frame.
For even more angle, word on the street is that you can grind down the stops in the box or replace it with a remanufactured or rebuilt junkyard quick ratio box from a Monte Carlo SS.

This thread may help you:
https://www.thirdgen.org/forums/susp...gen-101-a.html

Good luck, and if you go through with this, remember... WE LIKE PICS AND VIDEO!

 

I have the 12-1 box out of a GTA Trans Am and if you have the OEM steering wheel you should have about 2 1/2 turns from left lock to right lock thats all the way from left to right

 

Thanks guys, I plan on just grabbing another two or so steering boxes, just to be safe. Mirror Image I plan on running a 12.5" steering wheel, and midnight I'll definitely get some videos