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Quick steer ratio manual racks

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Old Sep 11, 2009 | 09:44 AM
  #1  
SomeGuy25thZ's Avatar
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From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Quick steer ratio manual racks

Anyone have one? ANy pics?

Where can I get one? The spohn manual rack is 3.75 turn to turn which is too much. I am looking for something with a quicker steering ratio.
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Old Sep 11, 2009 | 04:22 PM
  #2  
l_dis_travlr's Avatar
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From: League City, TX
Car: 90 Formula -- tot resto in progress
Engine: 350
Transmission: 700R4 w/ 2500 stall, by Owen @ ARD
Axle/Gears: 3.23 posi disc
Re: Quick steer ratio manual racks

Isn't less than 3.75 l-to-l getting into Indy/Formula car range?
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Old Sep 16, 2009 | 01:46 AM
  #3  
RED_DRAGON_85's Avatar
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From: Norfolk VA
Car: 85 Camaro IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: open rear, 3.42 gears
Re: Quick steer ratio manual racks

you have to realize two things:
a) this is a manual rack, ie, no power steering. anything less will really wear you out.
b) rack and pinions are measured differently... the lock to lock only crudely estimates the actual ratio, which is really determined by the pinion size

another thing to keep in mind is that to properly use rack and pinion you will need to shorten your spindles, which will effectively increase the rate of steering.
you can shorten the spindles even more and have a much higher rate.
IMO steering systems should be measured in degrees of steering wheel input per degree of wheel turn...
the lock to lock thing is really outdated.
for example
box a from an s-10 is a 2.75 LTL box
box b from a camaro is 2.6 turns LTL.
immediately the camaro one looks like a faster ratio, but upon closer inspection, you find that the s-10 box has a greater throw or angle at max lock than the camaro one, so although you turn the wheel more to get to full lock, you get more steering angle in the end.
the truth is that these two boxes are both 12.5:1 or whatever the ratio is. the point is that the ratio is the same and you cannot use turns-to-lock to accurately describe a steering box


[/rant]



sorry, i just had to get that out
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Old Sep 16, 2009 | 08:18 AM
  #4  
AlkyIROC's Avatar
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Quick steer ratio manual racks

Less turns from lock to lock also means you need more mechanical leverage to turn the wheel. Without using a power assist, this increased leverage is achieved by using a larger diameter steering wheel.

If you want a quick ratio steering, stick to a power assist. You won't like a quick ratio manual steering.
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Old Sep 16, 2009 | 08:51 AM
  #5  
Scorpner's Avatar
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From: MN
Car: 85 SC, 86 Berlinetta
Engine: V6, V8
Transmission: 700r4, 700r4
Re: Quick steer ratio manual racks

It's been a while, but I recall a manual rack being really heavy when moving slowly, so that is another compromise you might have to make.
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Old Sep 16, 2009 | 11:40 AM
  #6  
Saabster's Avatar
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From: Greater D.C. area.
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: Quick steer ratio manual racks

Originally Posted by Scorpner
It's been a while, but I recall a manual rack being really heavy when moving slowly, so that is another compromise you might have to make.
Yeah, manual racks are at their worse when at a dead stop, more so if you have wide tires. Once you're rolling, it doesn't matter as much.

I'm kinda skeptical of a manual steering on a camaro, my steering is pretty heavy in stock form.
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Old Sep 16, 2009 | 01:13 PM
  #7  
89_RS's Avatar
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From: Ft Wayne, IN
Car: 2003 F-150
Engine: 4.6L Modular V8
Transmission: 4R70W
Axle/Gears: Ford 8.8"/3.55 LSD
Re: Quick steer ratio manual racks

Originally Posted by RED_DRAGON_85
another thing to keep in mind is that to properly use rack and pinion you will need to shorten your spindles
According to Spohn, their kit is a direct bolt-in replacement for the stock power steering.
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Old Sep 16, 2009 | 04:24 PM
  #8  
RED_DRAGON_85's Avatar
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From: Norfolk VA
Car: 85 Camaro IROC
Engine: 5.7 TPI
Transmission: 700-R4
Axle/Gears: open rear, 3.42 gears
Re: Quick steer ratio manual racks

it bolts in but your steering radius will be reduced
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Old Sep 17, 2009 | 07:44 AM
  #9  
SomeGuy25thZ's Avatar
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Joined: Sep 2007
Posts: 599
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From: Long Island, NY
Car: 1992 z28
Engine: 383 LT1 in the works
Transmission: T-56 in the works
Axle/Gears: 3.73 in the works
Re: Quick steer ratio manual racks

You can use Racecrafts drop spindles with modified steering arms to help get back the steering radius. I ordered a set. We'll see in a few weeks once things start coming together.
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