Wrangler PS Pump

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Tapage

Tapage

Club 4X4 Panamá
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Hello all . . I hope someone have few tips and data about this pump ..

1991 91 JEEP WRANGLER SAHARA Power Steering Pump:eBay Motors (item 190316624273 end time Jul-23-09 12:03:04 PDT)

Seems to be the base pump that use PSC to modify and searching around the web found some great numbers for this pump ..

Something like 1400 PSI and 2.8 to 3.1 GPM .. and aditional I'm planing to use with a smaller ( aprox 60% ) v pulley that I'm gonna make ..

All to go ini my lovely Tencha and with my rebuild PS box and new PSC hydro piston 1.5" X 6"

opinions and comments are welcome ..

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Well still not tooo hardcore but here m I with some info ..

here my stoc space and my factory PS pump without pulley ..

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here a side view ..

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here my cylinder ..

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I was under the impresion that the piston will help with my lazzy steering at low rpm .. and was my bad .. was a PS problem more that wasen't related with adding a cylinder ..

but .. anycase I'm here .. so won't get back ..

In the middle my factory pulley and sides 2 smaller pulley options .. was there and start replacing my TREs just for safety .

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Here is my factory PS pump installed and running with a smaller pulley .. she did the Job .. got nice press but still not enough flow rate ..

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Here is the space that I have for a PS pump ..

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I decide was enought to let my proyect die with a semi working PS .. so source a brand new wrangler PS pump .. that show impresive numbers in the book for a stoc pump ..

1400 PSI and 3GPM .. so I take it .. here my base and pump out ..

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here is my factory PS pump alone ..

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Here is the new pump in ..

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another shot ..

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New pump on the job ..

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cylinder .. doing pretty welll

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My tapped box .. ( by me ! :D )

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So after this long love story .. I'm still little disapointed with my pump .. it have not enought flow ..

At idle ( and remember my diesel usually runs low rpm .. and low idle ) I can't turn side buy side my steering wheel as fast as I can do in my 80 series for example ( valid comparision ) and I knoiw it's due to a non enough flow ..

So the question is .. how much flow I need from the pump to run fast my steering .. ? }}

In the PSC site they show a PS pump that loos pretty the same as I'm running right now, and they said it's ported to 1600 PSI and 4.5GPM ..

(SP-1200X) TC series Extreme Duty PS Pump [SP-1200X] - $175.00 : PSC Motorsports, Off-Road Steering Experts

Comments are appreciated ..
 
i had similar problems with mine and i tried a smaller pulley and a couple of different chevy pumps and one agr pump that i got from jegs and still hard to turn at low rpm's....when i finally got a psc pump it solved the problem....if you call them and ask for it they will make you a super pump
 
that stinks to do all that work and not come out the way it should have. I wonder if you could drill out the restrictor (which may decrease its life span especially without running a cooler) would help? I did that with my stock saginaw pump and it really helped.
 
He did all that work, but did not spend the money on one of the most important parts........the pump. I tried all types of Saginaw pumps and finally talked to PSC to get one of their super P-type pumps. Huge improvement of the stock Saginaw pumps.
 
I was talking today with Kelvin at PSC .. and he said if I ported the valve ( wonder which valve in the PS box ? ) what of course I didn't ..

He said 3GPM are plenty ( for my setup ) so that's good news and bad new .. the good are I need to drop my box again .. if I can source the info on how to ported the box valve ...

Dow anyone have info about this valve ..?
 
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Here there are a few fellows that already ( with success ) tap a Toyota Stering box .. they already do some valve job on the box .?
 
yep...
 
Mace said:
yep...
Click to expand...

when you do the box job .. just tab it in the rigt places and nothing else .. and found a nice fast steering ?
 
The box port job is only to allow for Hydro assist. It will not "speed" up your steering. It only allows you to turn when bound up. More likely it will slow your steering down slightly due to the increased need for fluid.

There are no internal mods to a steering box that will help speed up the steering. You could go with a smaller piston diameter in a different steering box, but that would make it harder to steer at a stop.
 
Mace said:
There are no internal mods to a steering box that will help speed up the steering. You could go with a smaller piston diameter in a different steering box, but that would make it harder to steer at a stop.
Click to expand...

I was ready to a little slow steering .. but constant .. now when I turning to one side is start little slow and fast in the proces .. ( 1.5 turn to each side )

I'm not interested in a smaller piston .. ( thought I have a smaller one ) or swaping box ..

I was under the PS pump making all the job and the piston sharing the efford with the box ( box instead of orbital valve in a full hydro )

This message let me a little lost ..

Who built the gearbox? There is more to a cylinder assist gear than just
putting ports on it. If the valve is not ported the fluid is not making it
through the valve fast enough to turn the gear and the cylinder. 3 gpm
should be plenty.

Kelvin Jackson
PSC Motorsports
817-270-0102
 
Tapage said:
I was ready to a little slow steering .. but constant .. now when I turning to one side is start little slow and fast in the proces .. ( 1.5 turn to each side )

I'm not interested in a smaller piston .. ( thought I have a smaller one ) or swaping box ..

I was under the PS pump making all the job and the piston sharing the efford with the box ( box instead of orbital valve in a full hydro )

This message let me a little lost ..

Who built the gearbox? There is more to a cylinder assist gear than just
putting ports on it. If the valve is not ported the fluid is not making it
through the valve fast enough to turn the gear and the cylinder. 3 gpm
should be plenty.

Kelvin Jackson
PSC Motorsports
817-270-0102
Click to expand...

The initial slow, then speeding up is the volume issue put out by the pump.

Steering box and the Ram share the load, they both require a certain amount of fluid to perform properly. If you are not producing enough fluid, the steering box will try to turn, but will not have any assist till the piston in the hydraulic ram starts to build up pressure.

Pull the ram off of the steering rod and try to turn. The box will have NO assist till the hydraulic ram dead ends. Then the PS box will have assist. The two parts of the system have to work together for the proper amount of assist.

The valve that is necessary is in the pump, not the PS box. There are no real "valves" in a PS box. What Kevin meant was that if you just port the PS gearbox and do no other mods, you will not have a balanced system.

Follow the WTOR instructions for the PS pump mods.
 
Mace said:
The valve that is necessary is in the pump, not the PS box. There are no real "valves" in a PS box. What Kevin meant was that if you just port the PS gearbox and do no other mods, you will not have a balanced system.
Click to expand...

Got it ..


Mace said:
Follow the WTOR instructions for the PS pump mods.
Click to expand...

mine aren't exact a saguinaw .. but I will check on the pressure port at the PS pump and report what I can found ...

Edit: Thanks for your time to explain Mace . appreciated.
 
i hope the wtor pump mods work for you, they didn't make a appreciable difference when i tried them but i think i had a weak pump (old and tired)
 
mookie said:
i hope the wtor pump mods work for you, they didn't make a appreciable difference when i tried them but i think i had a weak pump (old and tired)
Click to expand...

Actually my pump it's little diferent .. ( aren't a saginaw ) so I will try and see what happend .. it supposed to be a " new " pump ..
 
Finally found this thread, You do realize you have about 6 threads started on this subject. LOL!



From my personal experience, the problem you are having will not really go away. I have an entire PSC Motor Sports system on my Blue 1976 FJ 40. The modified GM style Pump, steering box and thier cylinder.

It turns slow at low RPM's and gets worse the hotter the fluid gets. I played with different pulley sizes and settled on a 6". The larger the pulley, the slower the pump speed, the smaller the pulley the faster the pump speed but the sooner you "Boil Over" your fluid. I have added a cooler and it does not get as hot or blow out the cap vent anymore but it is still slower at idle. Not too many vehicles idle at 580 rpm. I don't know what the RPM of the pulley is with my 2F engine running at 580 RPM.

These are just my personal experiences with my rig.
 
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