Hydro assist

buster · Sep 16, 2007

Hydro assist for a Toyota.

The rig is a street legal rig, with duals, suspention, 35s, ext...

From what I gather so far a 1.5" ram can work with a stock pump but is a bit sluggish. I am not looking for slugish steering.

I assume that a 1.5" am with a upgraded pump, rez, and cooler will not be slow.

I am not interested in drilling out the restrictor plate in the stock steering box due to long term failure.

A larger ram will benifit me in the long run I assume. Larger tires always seem to happen along with other upgrades over time.

The pump upgrade will bring the PSI from 1300 on stock to 1600. So is this enough PSI to run a full Hydro set up?

So this is what I am trying to decide
A: Stock pump with 1.5" ram and slow steering? (not realy what I want)
B: Upgraded pump with 1.5" ram (may be able to use pump on full Hydro latter down the road, and would not be sluggish)
C: Upgraded pump with 2" ram (only if it isnt sluggish and the 1.5" ram wont cut the musterd with larger tires down the road)
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Toyotanut · Sep 17, 2007

For your hydro assist, I think that you would be better off using a 1.5" ram with either a modded stock pump or even an aftermarket pump. You ahve to remember that with assist it is just there to help the steering box turn. It is not doing all the work as with a full hydro set up. Keep with an 1.5" ram and a modded pump or aftermarket.

crash2 · Sep 17, 2007

I have done both versions on customers rigs 1.5/2.0 ram. I have found the 1.5" ram works better for steering reaction times...

buster · Sep 17, 2007

Thanks guys.....any retort on box failure with the restrictor drilled out? I am having people tell me that yes it will hurt them in the long run and others who say no way, that is not true.

Grommit327 · Sep 18, 2007

If you're worried about the steering speed then spend the cash and get a PSC pump...they work pretty good. Mine turns a 1.75 ram about as fast as I can spin the wheel. I guess TG is making a yota pump as well...don't know about it's quality

brokenparts · Sep 18, 2007

buster said:
Thanks guys.....any retort on box failure with the restrictor drilled out? I am having people tell me that yes it will hurt them in the long run and others who say no way, that is not true.

I drilled mine out for hydro... no problems so far. It does add heat, so adding a tranny cooler into the system is a must.

CrustyJeep · Sep 18, 2007

Has anybody heard of opening up the ports in the steering box spool valve?

benw1 · Sep 18, 2007

Pope CrustyJeep said:
Has anybody heard of opening up the ports in the steering box spool valve?

I sent my YJ box to PSC to be converted to assist. They said they "internally ported" the box for better flow, so I'm guessing they did modify the spool valve ports. I use a 1.75" PSC ram, the PSC modified box, and I drilled the port in my stock YJ pump and I have no problem turning the wheel as fast as I want/am able to.

CrustyJeep · Sep 18, 2007

benw said:
I use a 1.75" PSC ram, the PSC modified box, and I drilled the port in my stock YJ pump and I have no problem turning the wheel as fast as I want/am able to.

I use the same ram, but a stock Waggy box and stock GM pump, and it is not fast enough. Maybe there is something to the ported valve thing. Oddly I can't find anything about it on the web, and I'd like to try it.

benw1 · Sep 18, 2007

Pope CrustyJeep said:
I use the same ram, but a stock Waggy box and stock GM pump, and it is not fast enough. Maybe there is something to the ported valve thing. Oddly I can't find anything about it on the web, and I'd like to try it.

Have you tried modding the pump? Mine was slow until I drilled out the port in the pump.