Originally Posted by Retrofit
I will take the full blown answer please !
Thank you very much !
Okay, Here goes. But I am going to type fast so please excuse the spelling. I am assuming that the op is wheeling a 300Tdi.
First off, I have a lot of experience with this. Including pulling my PS pump off the motor in the middle of the desert and throwing it as far as I could. Then having to shamefully go look for it and clean it off.
The OP had two very separate concerns, boiling fluid, and ease of turning. The two are separate issues. I'll take on the boiling fluid first. Do not switch to synthetic. It has it's place, but in a PS pump is not one of them. The best solution was mentioned in an external cooler. The bigger the better. It's a good thing to have no matter what.
Now on to the turning issue. The pump that rests in a 300TDi sucks. In fact, Lance from PSC gave me a line that still cracks me up. When I asked him if the pump would be capable of turning a full hydro system, he said: "The only thing this pump is capable of is sinking, if you threw it in the ocean". The pump puts out the same psi at idle as it does revved, which is very little.
So, would a higher rated pump help, well, of course. But, the pump in the 300 is reverse rotation and in a very tight spot. PSC does make a pump that will fit there but you have to cut the aluminum cover of the engine to make it fit. It's really not too bad, Pendy showed me how to do it. Once the pump is fitted, you have to get rid of the absolutely retarded plumbing of the PS lines. Pumps were NOT meant to suck, so the only way to keep a good one alive is to mount the reservour over the pump. That can be tricky. But it is necessary, and in fact, should be done no matter what you do as it's a good upgrade and will limit the starvation.
Okay, so now you have a good pump, will it help? No. Okay, probably. But now you are onto the next hurdle, which is a ps box with two gerbles fighting instead of actual gears. The box with 35in tires is maxed out completely. The extra fluid MAY make the steering easier, but WILL eventually destroy the box.
So the answer, in my opinion, is to go full hydro.........Okay, I'm kidding. I know that is out of the question for most. I would simply add a power assist to the stock box and the stock pump on 35's. If you want, it's a great idea to add the good pump too, but if you are getting by on the 35's with the stock pump, you will get by better with the power assist. The PA ram will take a lot of pressure off your box and allow it to live longer as well. Thats a pretty cheap thing to do at around $200. I would also add a PS cooler and relocate the reservior as well. The cooler is like $35. A bling bling reservior is sexy, but not necessary. If you want extra volume, you can source a junkyard one and fab it in.
My steering was a very difficult thing to figure out. Without PSC, it would have been impossible. I would definately buy from them if you end up doing anything. Cheers