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Steering and handling upgrade
#1
I posted this in my intro a while back but thought it might be of use in this part of the forum in case some may not have seen it.

If there is one thing I would urge all 71-73 owners to do - install some sort of subframe connectors/chassis stiffeners. Especially if you are running stiffer then stock springs. I found that whatever stiff springs the previous owner had installed were just flexing the chassis - in effect just making the chassis the spring. The stock springs are way too soft in my book for even casual driving - especially being about 40 years old. If you stiffen the chassis and run some descent shocks and springs all around it makes these cars a lot more enjoyable to drive. The next thing I would do is replace the stock steering box with one from Lee Power Steering - they rebuild the stock Saginaw hybrid Ford box to whatever specs you would like. They will still work with your stock pump. What I did was get one built that has a 12:1 ratio and a bit less boost and more feel. Makes the car a lot more nimble and tight. It is also about 1/3 the cost of a rack and pinion conversion. I think I paid around $450 for box and hoses. Our boxes can be rebuilt basically to mimic the older Corvette boxes used in racing and stock car racing. I ended up running a more modern 5.0 Mustang style pump which are very common and a lot quieter then the old one was. Also a tad lighter.
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#2
Too funny. I was thinking on the way home yesterday that I should post asking who had subframe connectors and recommend them. This is very very true for us convertible folks. The hard tops helps with the strength of the uni-body.

'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
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#3
I was thinking about doing and have a dumb question but whats the stock steering ratio?


Jayson
[Image: 36319488731_8f2a376549_z.jpg]
73 Mach 1 Mustang
89 Dodge Shadow ES
94 Jeep Wrangler

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#4
TheJ;27509 Wrote:I was thinking about doing and have a dumb question but whats the stock steering ratio?

http://www.themustangshop.com/steerbox.cfm
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#5
Thanks for the link.

Jayson
[Image: 36319488731_8f2a376549_z.jpg]
73 Mach 1 Mustang
89 Dodge Shadow ES
94 Jeep Wrangler

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#6
If you choose a modern faster ratio and more feedback it makes the car a better handler. The 12:1 I chose might be faster then some folks may desire. The stock ratio is too slow and sloppy in my book though. I think stock is 18:1 or so with the power steering box. 14-16:1 is pretty common these days. Lee Power Steering can rebuild a 71-73 box as fast as 8:1 which is like a sprint car.
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#7
kblackav8or;27519 Wrote:If you choose a modern faster ratio and more feedback it makes the car a better handler. The 12:1 I chose might be faster then some folks may desire. The stock ratio is too slow and sloppy in my book though. I think stock is 18:1 or so with the power steering box. 14-16:1 is pretty common these days. Lee Power Steering can rebuild a 71-73 box as fast as 8:1 which is like a sprint car.

After 27 years and a quarter million miles I bet I would get into trouble if i changed my steering ratio.

Another upgrade that I really liked is the upgraded front strut rods. There are several different companies that make them, I went global west and love them.


'Mike'
73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

Pics of modifications included in:
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#8
hmmm what would you recommend for an occassional road racing/autox. but mostly back-up car/ weekend warrior? i have some 600lb maier racing coils ready to be installed and some 200lb leafs that are in going to be bought real soon. no subs or thicker sway etc. decent shocks for a budget. here is a post i did before i saw this.

http://www.7173mustangs.com/thread-crazy...on-freeway

also thinking of putting some wider wheels for racings. i have currently 225/R18 in the front and 275/R20 in the rear. and thinking of either keeping the 225 or going with a 235 or 245 for the front. and either a 285 or 295 for the rear.

1972 Satin Black Coupe, turns better than average, goes vroom with 303 RWHP.
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#9
Don't do the front springs until you stiffen the chassis. All it will do is turn the car chassis into the spring. You need subframe connectors at a minimum. The rebuilt steering box from Lee Power steering even without a faster ratio is so much better then the vague zero feel stock Ford stuff of the era. I really like the stuff from: http://streetortrack.com/
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#10
what sub frames would you recommend? i was looking atr either maier racing or TCP.

1972 Satin Black Coupe, turns better than average, goes vroom with 303 RWHP.
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