I've read that our stock power steering is 2.5:1 and the "Z" marked boxs from some IROCs had 2.25:1 ratio. What are some other options? What is the s10 manual box? I'd like something with a 2:1. I know that the first gen maro's and early Nova's used the same power steering box (probably more cars but I don't know for sure) as we do so what are our options?

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, Jon (350 TBI!)
91 Red My website

 

A manual steering box isn't a quick ratio box. It's geared low for mechanical advantage since there's no power assist. I never counted mine but it's probably 3:1

Quick ratio boxes were usually used on third gens with 16 inch rims but not all. My 454SS also came with a quick ratio box.

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87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.69
Best MPH on a time slip: 121.52 altitude corrected to 127.76
Altitude corrected rear wheel HP based on power to weight ratio: 504.5
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
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87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

Yeah I know it's not a quick ratio box. I want to know OF a quick ratio box other than the "Z" box. I might just get a smaller steering wheel but I'd like to just get a different steering box if possible.

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, Jon (350 TBI!)
91 Red My website

 

I believe people but "manual" S10 steering boxes in F-bodies to save weight. The box is physically smaller and lighter, plus you get to loose the power steering pump and pulley. The manual box has a different ratio so you can steer the car manually

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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

And the FirstGens had ANYTHING but a close-ratio steering gear. My '67 had a tight front end but was still failrly wide, lock-to-lock. The SecondGen 'F' cars began using a variable-ratio box that was really nice. The '71½ Z28 and later had an optional variable-ratio box that was very nice, and the same box was available for some of the Firebirds.

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Later,
Vader
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"Fear is how I fall, Confusing what is real..."
Adobe Acrobat Reader

 

That won't change the ratio.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES,it is a 9 bolt & YES they are 3.73's, not 3.70. 4.11's to follow soon )
www.koolmeister.com

 

...but will change the distance your hands have to move to get the same amount of turning action

 

Thanks Mike. I had a smaller grant wheel on my 86 sc and it was great. I felt like I had a lot more control over the car. The larger the wheel the more it feels like a boat.
So Vader, what would be the tightest box for autocross? A second gen f-body?

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, Jon (350 TBI!)
91 Red My website