Ford P/s Pump to Miata rack [Archive] (2024)

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fun02SE

5th July 2012, 16:02

I am having a custom pressure side hose made. Is there a flow restrictor needed? If so does anyone have the part number of this fitting?
Or any advise?
The Mazda hose has a flow restrictor the full length of the hose built in.:dunno:
Jack

chpmnsws6

5th July 2012, 19:15

I'm sending this to Jason in hopes he chimes in :)

ManchesterMiata1

6th July 2012, 08:55

Had a custom Ford to Mazda hose made for my car. Used the factory fittings and compression fittings on the tubing to mate up with the pressure hose. I have seen,on another car, the ford hose cut in the middle and the mazda hose cut in the middle and a crimp connector joining the two. If you look on page 17 of my cardomain site there is a picture of the hose. As luck would have it I will be in Tampa next week,any chance I could drop in to see the build? Good luck with your project.

fun02SE

6th July 2012, 11:09

Thanks, I will look. What is your cardioman address?
The problem is that the Miata hose is a double hose, that is, a small hose inside a larger hose. The small hose is attached to both end fittings. The Ford hose is full size for the full length. I think there may be a fitting at the Ford pump that I am missing that is the Ford restrictor piece. Looking for some one who has done this mod for info.
I have been told that without the proper restrictor that the P/S will squeel, and over heat the fluid.

I would welcome anyone who is in the area to stop by to check it out!
The car is at CVX_20's "toy Shop" in Sarasota. The shop is near the Sarasota airport.
Please email or call me with your itinerary, as it takes me an hour to get to the shop. I am usually there from 10AM. '-4-5 PM or 'til I get tired Mon. thru Fri. and some Sat. (I am retired)
I know that you will enjoy meeting with me and Mike. You will be amazed at some of the upcomming projects that we will be working next.
Jack Dahlmann
941-815-1850
jdahlmann@centurylink.net

topdownfun

6th July 2012, 11:44

On mine, I used a new Ford hose, cut the pipe at the rack end, put the Miata nut on it, flared it, used a brass washer to help it seal and it has worked fine. No leaks, no squeal, no apparent overheating, at least in normal driving. Just a normal Ford PS noise. I wasn't looking for a flow restrictor when I installed it and didn't notice one. To me it seems a little over boosted but the price is right for now.
TM

Panic Button

6th July 2012, 12:15

After reading your post, I'm concerned about the flow restrictor you mention in the Miata hose. I don't mean to take away from your question, but maybe you could go into a little more detail about the Miata hose and this flow restrictor and I can certainly start a new thread if needed. I used my stock '92 Miata pump, bought the Boss Frog rack S/S hose kit, and then had a local shop make me a new high pressure hose, re-using the original Miata high pressure hose fittings I cut off the original hose. They silver soldered the original fittings to the new hose fittings. Im going on my second year since my build was done, maybe about 4k miles and I havent had any kind of problems with the P/S that Im aware of, it works exactly like it did before the swap. Im also using the stock P/S cooler system too. I understand you are using the Ford pump, but if the stock Miata hose has some kind of flow restrictor built in, I was not aware of that and I certainly dont have that in my setup now. Should I be concerned that this flow restrictor isnt in place? Cheers, Duffy

chpmnsws6

6th July 2012, 14:01

If the steering effort feels fine to you, leave it be. The restriction gives less assist.

Panic Button

6th July 2012, 16:04

If the steering effort feels fine to you, leave it be. The restriction gives less assist.

Thanks and the steering feels exactly the same as it did before the swap. Maybe my '92 doesn't have this flow restrictor like the '02? Anyway, it seems like it's nothing for me to worry about, so one less thing to think about. Cheers, Duffy

fun02SE

6th July 2012, 16:42

It sounds as if my worries are unfounded! Wonderful!
I will not worry about the flow restrictor.
Jack:jump:

ManchesterMiata1

6th July 2012, 17:17

Click on my name to open the drop box and click on visit home page.
I have my site on cardomain under Manchestermiata1,makes it easy for this old guy to remember.
Looking forward to my trip to sunny Florida.

tbone heller

7th July 2012, 08:38

The fitting on the Ford P/S pump comes in 3 different orifice sizes depending on which vehicle it was intended for. You can tell them apart from each other by counting the grooves that are machined on the corners of the 1" nut of the fitting. This applies to Ford pumps. I am not sure about the aftermarket ones.

fun02SE

7th July 2012, 10:33

Tbone,

Great informtion! What is the grove code tha I need? My brother is sending m one from an '89 mustang.

Jack

Jim D

17th July 2012, 16:41

When I first got my conversion running, I was using the Miata P.S. system. After about six or seven months, I changed it over to a ford P.S. pump. I used the Miata resevoir, cooler line and rack with the Ford pump and a Ford/Mazda custom hose. The steering felt the same with both pumps. There is a little more noise with the Ford pump-sounds like a taxi.

Jim D.

Lee Bohon

17th July 2012, 16:57

Like some others have done, I too have a Ford PS pump and a Miata PS rack and joined the two by using a Ford PS line with the end going to the rack cut off, then slipped on the fitting that came off of my old Miata PS line, flared it then attached it to the rack. No problems in everyday driving. The only times I've ever experienced any problems were at an autocross and at a track event... neither of which I think had anything to do with the attachment nor over pressure.

At the autocross, the fluid ended up with a lot of bubbles and that was supposedly caused by some sloshing in the reservoir/low fluid level/over heating/boiling the fluid. There is a lot of working the PS pump in an autocross (especially the yee-haa way I drive) not to mention all the sloshing. I added a fluid cooler on the return line after the rack and have kept the fluid level high enough that I don't seem to have the issue anymore. Then again, I haven't autocrossed in a long time.

At the track event, the fluid would want to leak out of the reservoir cap. I think it's because the cap just doesn't seal well and in the long, high-g corners, it would seep out. A little rag strapped around the reservoir cap was enough to band-aid the problem while on the track (a trick I learned from some fellow Mustang owners that experienced the same leak).

fun02SE

17th July 2012, 21:02

Well guys, I got it hooked up. I now have three different restrictor fittings should I need to use a different size.
On mine, I picked the wrong ford hose as the tubing diameters are different. Luckily, there is a hydraulic hose shop here that fixed me up with the fittings to adapt the sizes. I took some pictures, but the camera is at the shop. I'll post the pictures.

Jack
P.S. Workin' on the exhaust system now.

joe morreale

20th July 2012, 20:17

Good luck Jack. Hope to see you on the road soon! Car's looking bitchin.

Ford P/s Pump to Miata rack [Archive] (2024)

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