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Old 04-24-2012, 02:01 PM
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Rack & Pinion for drag car ?

Rack & Pinion for drag car . going to put a rack in my 79 camaro drag car , does anybody know what if any difference in a 71-72 pinto rack & 74-80 pinto .
i am going to fab all brackets to mount it . reason for asking 74-80 is a lot cheaper , i know the width is the same i think something is different on the steering shaft , thanks steve

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Old 04-25-2012, 06:30 AM
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early pinto racks

The early ones are lighter, smaller tie rods and used the flex cable connection instead of a u joint, It's impossible to tell the safety of an old rusty flex connection. Ford went to the larger size when the started using engines larger than 1.6 and 2.0 4 Cyl. There is a reason no one uses the early ones on street rods.
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Old 04-25-2012, 04:30 PM
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http://cachassisworks.com/p-1768-bil...ect-width.aspx How much you lookin to spend?Reason being Im lookin to sell this never used one.Few yrs old but heyI dont recall the size but could find out.Im going power.
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Old 04-26-2012, 08:55 AM
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The problem with installing the Pinto/Mustang 2 rack is that the inner tie rod pivot point does not match the width of the Camaro inner tie rod pivot points. The result will be bump steer. Flaming River has what they call a ''Travel bar'' system that locates your inner tie rod ends in the original position.
Here
This set up is expensive, but could be duplicated at home relatively cheap.
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Old 04-26-2012, 10:39 AM
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I put a Unisteer setup in a Model A street rod a couple years ago. No idea on price, but it seemed well put together and compact.
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Old 04-26-2012, 02:55 PM
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Quote:
Originally Posted by cal1320
The problem with installing the Pinto/Mustang 2 rack is that the inner tie rod pivot point does not match the width of the Camaro inner tie rod pivot points. The result will be bump steer. Flaming River has what they call a ''Travel bar'' system that locates your inner tie rod ends in the original position.
Here
This set up is expensive, but could be duplicated at home relatively cheap.
how big of a factor would bump steer be . car will never be driven on the street
drag strip only
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Old 04-26-2012, 06:55 PM
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bump steer

On My buick powered willys you could crank the steering wheel with body lift on acceleration and the keep the wheels straight ahead. the problem is WHEN the front end comes down fast for any reason you don't have enough time to correct and Keep it straight. There is a WIKI here on using a cavilier center pivot rack and making a center traveler bar that you can drill and taper ream to get your geometry right.
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Old 04-27-2012, 04:31 AM
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Quote:
Originally Posted by stevej068
how big of a factor would bump steer be . car will never be driven on the street
drag strip only
It would appear every time the suspension cycles up or down. Initial launch, when the front settles down, and at the end applying the brakes would be the worst times. Either find a rack that duplicates your factory pivot points or build your own version of the travel bar. Some guys limit the front end travel with straps to minimize the bump steer, but it's a crutch.
The a arms and the tie rods will travel in different arcs, changing the toe as the suspension moves. Get it right and you'll have a safe and fast car.
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Old 04-27-2012, 11:56 AM
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looks like the (travel bar system) would be simple to build. what rack would be good for this project 79 camaro , could a power rack be used without the pump
thanks steve
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Old 04-27-2012, 01:36 PM
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stock bump steer.

I don't know how good the stock suspension is on your car, You can clamp the brake rotor so it doesn't turn, fasten a laser pointer to the rotor then jack the car up to see how it points . usually you can take out the coil spring to get full suspension travel to check it out and determine where the best pivot location is
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