What i.d. line size did you run from the box to the cylinder?
I've seen both 1/4" and 3/8". I was wondering if there was any noticable differences. I'm looking at either a 1.5"bore Columbus cyl. or a Chief cyl. The Columbus has 3/8" ports where as the Chief as 1/4" ports.
Any thoughts???
I'm using the factory V6 pump and ifs box for this setup,unless I can figure out how to graf my GM pump onto the V6.

tom

it doesn't matter. 1/4 or 3/8

Either one of those hose sizes will work. Your problem is going to be that stock toyota pump. The volume is way to low. It puts out plenty of pressure but volume is the ticket to hydro assist. A Saginaw ham can style pump works best.
I'm working on a tech article right now for Saginaws and jeep and hopefully ford pumps on how to bump up the pressure and volume on these units. Maybe you could use the same mods for that toy pump. I would do them myself but I have none to test with out here in west Texas.

Originally posted by TheLakeRat:
<STRONG>Either one of those hose sizes will work. Your problem is going to be that stock toyota pump. The volume is way to low. It puts out plenty of pressure but volume is the ticket to hydro assist. A Saginaw ham can style pump works best.
I'm working on a tech article right now for Saginaws and jeep and hopefully ford pumps on how to bump up the pressure and volume on these units. Maybe you could use the same mods for that toy pump. I would do them myself but I have none to test with out here in west Texas.</STRONG>add a big trans cooler??

Originally posted by SeaBass44:
add a big trans cooler??[/QB][/QUOTE]

Its not a lack of system or reserve volume. The pump itself does not flow enough fluid to fill the cyl in a reasonable time.

Yeah what he said. Sorry if i didn't make myself clear. Thanks Jeeprz.

Add the cooler anyway for heat reduction.

It sure won't hurt, and always a good idea.
Running synthetic fluid will help keep the heat down also.

what strok cylinder's are you guys using????? <IMG SRC="smilies/emb.gif" border="0">

8" stroke

How can the size of the hydraulic lines not matter, Simple math shows that Friction loss is almost twice as much with 1/4" lines than it is with 3/8. I understand that the pump can only fill a line/cylinder in a certain amount of time, but isnt that partly due to the resistance it meets.

So are you telling me that 3/8 lines wont turn the steering faster than 1/4", even if the pump has been modified for greater pressure and pilot hole has been drilled for greater volume.

please explain?

B2Krawler

@ 1500 psi and maybe 5 gallons a minnute that extra 1/8" aint shit if we were talking the difference between ¼" and ½" then there would be a substantal difference in flow

according to my refrence chart for central hydraulics ¼" will flow 10 gallons a minute @2000psi and 3/8" will do 12. In this application it probably wont matter unless you are cycling the steering back and forth 2 times a second

Originally posted by TheLakeRat
Either one of those hose sizes will work. Your problem is going to be that stock toyota pump. The volume is way to low. It puts out plenty of pressure but volume is the ticket to hydro assist. A Saginaw ham can style pump works best.
I'm working on a tech article right now for Saginaws and jeep and hopefully ford pumps on how to bump up the pressure and volume on these units. Maybe you could use the same mods for that toy pump. I would do them myself but I have none to test with out here in west Texas.



I would like to see your wright up on this when your done. I plan on hydro assist on my jeep:D

That was almost 2 years ago.

Here it is (http://westtexasoffroad.homestead.com/powersteering.html)

Originally posted by ryankopecki
That was almost 2 years ago.

Here it is (http://westtexasoffroad.homestead.com/powersteering.html)


Thanks man:D I guess I should have looked at the date on his post:cool:

That's one of the scariest pics I've seen in a while.

Originally posted by TheLakeRat
Maybe you could use the same mods for that toy pump. I would do them myself but I have none to test with out here in west Texas.
I have a spare 4cyl one if you want to take a shot at it? :D I'll be calling Monday to get my hoses from you. Forgot them when I ordered the ram.

wow, it's good to see that SOME newbies are searching, even back 2 years.

i use -6 lines.

line size matters and is one of the many small details that add up to building a complete system that works properly.

what kind of coolers is everybody running and where is the best place to get them? Can somebody show me a picture of a setup with a cooler? What line should you run them on? Anybody run filters and if so what kind?

I found that my sagnaw pump could not fill quick enough with a cooler, so I added about 8" to the fill tube, holds 1 extra qt, Cut the top off your filler, add a piece of rad hose and use a hose clamps to attach the part you cut off.

This worked best for me

go with 3/8 hose, dont care wht the chart says, there is significantly less friction loss....

Toy 2,
I hope the article helped you out, it is mainly to help out the saginaw pump users but a toy pump can me modified also,
If you need help just let me know and i'll be glad to give any assistance i can.
There are few different setups that i have seen come out of toy pumps so its a bit hard to just say what to do right now.
Hell if nothing else take some pictures of the fitting and piston and i can draw the mods for you and send them back.

I used a small 4 row trans cooler and mounted it in front of the rad.
I also used a GM Astro/Safari mini van PS reseviour (sp?), This added exta fluid capacity and it's ALOT easier to add/check fluid levels. The stoke will depend on your application. With my old D44 I used a 6in. stroke. With my new D60 I changed to an 8in. stroke due to the throw of the hysteer arms.
.02

JB

Toy 2,
I hope the article helped you out, it is mainly to help out the saginaw pump users but a toy pump can me modified also,
If you need help just let me know and i'll be glad to give any assistance i can.
There are few different setups that i have seen come out of toy pumps so its a bit hard to just say what to do right now.
Hell if nothing else take some pictures of the fitting and piston and i can draw the mods for you and send them back.


Thanks.. the article help alot.. this was planed for my jeep but I have now have a toy that I built and one that I one :D

I don't know if you remember me but I met you at moab this year. At the party the night it snowed so much :D

Line size does matter. In a hydraulic system the plumbing is part of the cooling system

on the ends of your rams are you just running a big bolt to mount them or a rubber bushing that fits in there and then running a bolt?