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Username Post: Power Steering        (Topic#363724)
EJOma 
Newbie
Posts: 43

Reg: 10-15-09
12-23-20 05:27 AM - Post#2810612    

I have a 1958 Impala 348 engine with the orginial power steering pump mounted on the rear of the generator.
Can I install a CCP 50003 box using the orginal pump to power it?



 


corvesy 
Contributor
Posts: 750
corvesy
Reg: 08-07-08
12-23-20 08:09 AM - Post#2810617    
    In response to EJOma

I think you will be fine others may want to chime in.



 
Delray_58 
Frequent Contributor
Posts: 1000

Loc: Scotts Valley, CA
Reg: 03-20-10
12-24-20 03:48 AM - Post#2810651    
    In response to corvesy

While I can't comment on the fit of the box for a 348, my experience with the CPP500 box has been disappointing. The primary issue is that the sector shaft has some lateral play, somewhere in the neighborhood of about 0.005" or more. Ultimately, due to the lever-arm effect that is present in the steering geometry, this results in play in the steering which is noticeable when driving in a straight line, such as a highway. This play cannot be "adjusted out" with the sector shaft adjustment nut. I ended up replacing my first CPP500 box with a second CPP500 box, and the play was identical. I confirmed that everything--EVERYTHING--i n my steering system is tight and free of play before determining that this was my last remaining source of play.

My next step is to try a Borgeson box to see if it improves this issue, as this problem seems to be a design flaw, rather than a manufacturing or reliability issue.

'58 Delray 283 3-speed OD
In the family since new


 
japete92 
"7th Year" Silver Supporting Member
Posts: 1592
japete92
Loc: No. Virginia
Reg: 01-18-13
12-24-20 07:14 AM - Post#2810659    
    In response to Delray_58

  • Delray_58 Said:
While I can't comment on the fit of the box for a 348, my experience with the CPP500 box has been disappointing. The primary issue is that the sector shaft has some lateral play, somewhere in the neighborhood of about 0.005" or more. Ultimately, due to the lever-arm effect that is present in the steering geometry, this results in play in the steering which is noticeable when driving in a straight line, such as a highway. This play cannot be "adjusted out" with the sector shaft adjustment nut. I ended up replacing my first CPP500 box with a second CPP500 box, and the play was identical. I confirmed that everything--EVERYTHING--i n my steering system is tight and free of play before determining that this was my last remaining source of play.

My next step is to try a Borgeson box to see if it improves this issue, as this problem seems to be a design flaw, rather than a manufacturing or reliability issue.



The Borgeson box instructions 'recommend' about 4 degrees of positive caster (I don't remember the exact number).

I also don't remember the exact steering ratio of the Borgeson box, but it's approx 15:1, compared to the GM OEM 22:1 (approx).

The additional caster is REQUIRED to provide the proper 'return to center' forces that steering ratio requires. The OEM upper control arms can't give that much (any more than about 1 1/2 degrees is pushing their limit). Without the additional caster the steering will 'wander' and holding a straight line is a chore.

Tubular upper control arms with built in 5 degrees of + caster solve the problem. There may be stamped steel after market arms with the required caster but I can not refer to any.

Because the hydraulic pressure is applied directly into the steering box, a pressure regulator/reducer can fine tune, and smooth out, the steering (another source of possible steering instability with the integral steering box).

Add a sway bar and roll in turns is reduced.

All the above is based on ALL other components being in proper operating condition. No issues with tires, bushings, alignment , or ANY degradation of ANY OEM part.

I have no info/experience with the CPP box, but likely the steering ratio is comparable with the Borgeson and requires the same additional components/alignment.

After spending WAY more than I originally envisioned, my steering is a little better than a proper OEM system, but the gain wa snot commensurate with the costs. If I could take a 'mulligan', I would have simply rebuilt my leaking control valve (the only problem I was having).

As for the original question:

The steering box does not know the source of its required hydraulics. Theoretically, if the pressures out of the pumps are the same the 'box' should not care. BUT, the steering ratio of the 'new' internal box MAY (emphasis on MAY) require more PSI.


Pete




Edited by japete92 on 12-24-20 07:30 AM. Reason for edit: No reason given.

 
EJOma 
Newbie
Posts: 43

Reg: 10-15-09
12-24-20 01:01 PM - Post#2810680    
    In response to japete92

Thank you all for you input. I've decided to have the original box rebuilt.
I don't need the headaches, just thought it might be a good idea.
This is a GREAT site.




 
Delray_58 
Frequent Contributor
Posts: 1000

Loc: Scotts Valley, CA
Reg: 03-20-10
12-27-20 09:18 AM - Post#2810828    
    In response to EJOma

I agree with japete on the caster issue. I also ended up with Global West upper control arms to ensure I had enough caster so the car would be comfortable to control on long highway trips. If you're happy with the current steering ratio you can certainly stay with the stock setup.

'58 Delray 283 3-speed OD
In the family since new


 


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