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Tech Area => Knowledge Base Articles, Submissions, and Comments => Topic started by: TexasT on August 31 2013, 10:01:26 AM

Title: Hydroboost Conversion
Post by: TexasT on August 31 2013, 10:01:26 AM
Since it seems they local board requires logging in to view I am posting this over here for easier access.


A little back ground, my car has lead a rough life. The original powermaster went out when the car had pretty low miles(like 30k or so), but i had it replace with another powermaster to the tune of about $800. I didn't know any better at the time. It worked until about 125k miles. When it would no longer assist braking it was decided to swap to a hydroboost. I have the hydroboost on two GM trucks and it was on the 84 T-Type I traded in on the current T. I didn't like the look of the big iron master cylinder so I opted for the Cadillac unit with the plastic reservoir. Funny because I can remember thinking, "why would anyone want a plastic master cylinder when you can have the security of a nonleaking iron one when I put new ones on vehicles like my GS and Blazer. I guess perceptions evolve.


 I did some reading and ordered the parts recommeneded at the http://www.cedarcrestspeedlab.com/techarticles.html?col7=open#CollapsiblePanel7 (http://www.cedarcrestspeedlab.com/techarticles.html?col7=open#CollapsiblePanel7)  . This link also outlines the pressure line mod that is required to fit that hose onto the 86-87 power steering pump. Ill include pix of how I accomplished it.I ordered the parts for an 84 TR from rockauto.com. I hear that the cores are getting scarce so I have been picking them up when I see one for sale. These hydroboost units dont have an accumulator like the newer astro van pieces but they are bolt in. I think the accumulator gives a false sense of security as I have had the Suburban chuck a tensioner pulley thereby loosing the belt(and power steering pump). You got non assisted steering and non power brakes in a hurry, and this truck has the accumulator.. SO, inspection of the pulleys and belt are in order at each oil change to prevent this scenario.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1245.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1245.jpg.html)
These are the hoses I ordered.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1241.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1241.jpg.html)
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1240.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1240.jpg.html)


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1230.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1230.jpg.html)
Booster


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1231.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1231.jpg.html)


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1229.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1229.jpg.html)
Master Cylinder


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1226.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1226.jpg.html)


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1237.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1237.jpg.html)
As you can see the hydroboost came with the actuating rod already on it.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1263.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1263.jpg.html)
Locally, I bought some additional pieces, including a brass tee, and some trans cooler line to tee the return into the power steering return line.
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1264.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1264.jpg.html)


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1265.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1265.jpg.html)


A line wrench so as not to round off and fasteners. This was a cheap one from autozone. I called around but was unsuccessfull, and made a trip by sears and harbor freight with no luck. I didn't see a tool truck so I bought this one and it worked fine.



Title: Re: Hydroboost Conversion
Post by: TexasT on August 31 2013, 10:15:00 AM
On to the actual work.


We removed the powermaster and associated bracket and ran into a snag on the pedal. The cotter pin was corroded and didn't want to come out. I wrastled with it and cut off each end where I could slide the actuating rod off the stud on the pedal. I heated the stud up in an attempt to get the remains of the cotter pin out but ended up drilling the pin out. Then a trip to the part house for a cotter pin assortment to replace the disintegrated original.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1246.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1246.jpg.html)
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1256.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1256.jpg.html)


When re-installing the pedal I unknowingly bolted it all up with the idea that I could slide the actuating rod eye onto the pedal stud, but I was wrong and ended up unbolting it and installing the actuating rod to the pedal, THEN bolting the pedal and hydroboost to the firewall. This little bit of info could potentially save you an hour. As I wrastled with it under the dash for quite some time before it was deemed necessary to unbolt.
Then we bolted on the master cylinder.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1260.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1260.jpg.html)


It should be noted, we had to "massage" the brake lines to fit the master cylinder as the front line on the powermaster goes to the rear on the master cylinder and the rear line goes to the front. Not had, just be careful you don't kink a line by being to rough when performing the "massage".


Title: Re: Hydroboost Conversion
Post by: TexasT on August 31 2013, 10:42:22 AM
On to the lines and such.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1323.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1323.jpg.html)
To get to the power steering pump I found it necessary to remove a few items. Your desire to remove or maybe you have little hands may vary. I pulled the intake tube/maf, alternator, intercooler(i cleaned it out while I had the other things apart), a/c compressor(I just laid it to the side, no need to disconnect the lines), to get to the top of the power steering pump. This is where the flare wrench was used. I didn't want to round off any fasteners.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1318.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1318.jpg.html)
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1319.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1319.jpg.html)
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1320.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1320.jpg.html)
(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1321.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1321.jpg.html)
As you can see I used a screw driver as a lever to "massage" the line where I wanted it. Not hard. I took it in small doses and trial fit it until I liked how it sat and didn't rub on anything. Not hard. I also want to mention that there are o-rings that go on each end of the line. When removing the old line from the pump, you need to be sure the o-ring comes out with the line as two o-rings in there will result in a leak. You don't want to have to take the accessories back off to correct a leak that can be prevented.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1324-1.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1324-1.jpg.html)


Then we tee'd into the return line to complete our circuit.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1333.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1333.jpg.html)


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1331.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1331.jpg.html)
Return line off the hydroboost.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/HydroBoost%20Brakes/IMAG1435.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/HydroBoost%20Brakes/IMAG1435.jpg.html)


Once you have the accessories re-installed, you must "burp" the power steering / hydroboost setup. Get the belt back on and make sure you have the rest re-installed so you can jack up the front wheels and run the engine. Top up your power steering reservoir, and have some fluid handy to keep topping it off. You don't want it to run the reservoir dry as this will just make burping take longer. With the engine running,(Id have the rear wheels chocked or jacked up as you dont have any brakes at this point, and you'll need to jack it up to bleed anyway.)With the engine running, and the front wheels up, turn the steering wheel lock to lock several times to burp out any air in the system. You should see some foaming in the reservoir and hear the pump a little as you are doing this. When there is no more foam I think you have successfully burped the system.


On to bleeding the brakes. I don't know how anal you are but my car had never had the brake fluid changed except I guess when the powermaster was changed way back when. The fluid was pretty brown and rusty so it was deemed necessary to flush out the system with new fresh fluid. I recommend you do the same.


 I started out by bleeding the master cylinder on the car. I put a two x four under the pedal to prevent the pedal operator from putting it all the way to the floor. We cycled the pedal several(ok many) times to get the air out. Safety glasses are a good addition at this point, no sense in getting brake fluid in your eyes. Once you stop seeing the little bubbles it is time to hook up the brake lines to the master cylinder. As noted above the front to the powermaster goes to the rear of he hydroboost master cylinder and the rear goes to the front. Some careful "massage" gets these lines to where they need to be. To get the cruddy stuff out into the hoses and catch containers we opened the rear bleeders and put the hose and catch container on and manned the master cylinder with fresh fluid so it would go dry and we would have to start again. Once I started getting clean fluid I bled the rears starting with the pass rear, moving to the dr rear then moving on to flush the fronts and bleed them too. My car has pretty much resided in Texas except the year we spent on an adventure in southeast WI so the stuff under there is pretty easy to work on. Your car might require some new parts to complete the bleeding. I bought some speed bleeders but ended up not using them. I just got one of the "helpers" to operate the brake pedal while I did the bleeder/ hose/catch container.


Once bled to satisfaction with no bubbles coming out at the catch can we buttoned her up, put her back on the wheels and went out for a test drive. After a trip around the block it was deemed good for longer trips. So we went to the parts house for some wiper refills so we could try for a safety inspection.


(http://i444.photobucket.com/albums/qq167/texastandgransport/The%20T/Around%20the%20Block/IMAG0060.jpg) (http://s444.photobucket.com/user/texastandgransport/media/The%20T/Around%20the%20Block/IMAG0060.jpg.html)
Title: Re: Hydroboost Conversion
Post by: TexasT on August 31 2013, 12:30:11 PM
ANY questions?
Title: Re: Hydroboost Conversion
Post by: daveismissing on September 02 2013, 11:25:16 PM
Hydroboost uses the PM pedal dimensions vs the Vacuum pedal dimensions?
Title: Re: Hydroboost Conversion
Post by: TexasT on September 16 2013, 10:43:39 PM
I'm not sure on the vac pedal. This is one of the reasons I chose to go with the hydroboost so I wouldn't have to locate and purchase a vac pedal. Not hard to locate but just another hassle I didn't want to undertake.



Title: Re: Hydroboost Conversion
Post by: 1KWIKSIX on September 17 2013, 08:21:16 AM
 Believe you are correct Dave......doin g the conversion, the HB system requires the use of the brake pedal from the PM system.
Title: Re: Hydroboost Conversion
Post by: TexasT on September 19 2013, 09:16:15 PM
I guess I didn't understand the question. Yes Hydroboost and Powermaster use the same pedal. Vac is different.


Thanks for clarifying 1 (http://www.ihadav8.com/forum/index.php?action=profile;u=764)kwicksix
Title: Re: Hydroboost Conversion
Post by: TurboCajun on May 15 2014, 09:29:05 PM
does anyone have a diagram of the connections or routing, I am working on an 84 with hydroboost and converting to 87 setup and want to keep the hydro. but I need to know how to tap in the lines
Title: Re: Hydroboost Conversion
Post by: TexasT on May 17 2014, 08:51:33 AM
I guess I am unclear. You already have it on your car, right? Are you changing power steering pumps while upgrading to the 87 stuff? Surely the steering box is staying and so is the hydroboost unit.


If swapping in the 87 pump you will need the 87 reservoir.


I don't have a diagram but I believe the pump has a pressure line that goes to the hydroboost, then the hydroboost has a pressure line to the steering box.
The steering box and the hydroboost have drain back(low pressure hoses) to the reservoir(they are tee'd).
And the reservoir has a line to the pump to complete the circuit.



Title: Re: Hydroboost Conversion
Post by: TURBOPOWERED68 on May 17 2014, 09:08:27 AM
why didn't you use a hydroboost pump with the reserve?(http://www.danchuk.com/images/Large%5C13985_l.jpg)
Title: Re: Hydroboost Conversion
Post by: TexasT on May 17 2014, 11:19:58 AM
Have you priced that setup? I don't know about you but I have a wife, four children and a mortgage. It didn't even come close to my budget.


That reserve ain't much imo. I have a Suburban and a pickup with that setup. I've had the burb chuck a tensioner pulley and you are in no power steering and no power brake land in a hurry.
Title: Re: Hydroboost Conversion
Post by: daveismissing on May 17 2014, 02:58:17 PM
I'd think with a bit of research one could find an industrial accumulator that would not break the bank. That's all the PM's current replacement is.
Title: Re: Hydroboost Conversion
Post by: earlbrown on May 17 2014, 10:22:01 PM
The expensive kit above looks like an Astro van unit.   Except that Astro units aren't that expensive, that is.
Title: Re: Hydroboost Conversion
Post by: TexasT on May 18 2014, 07:14:14 AM
No, astro van hydro boost is very attainable. The rest of that kit drives the asking price north quite a bit.
I chose to go bolt on because it bolts on. Used the pwrmstr pedal and pretty much bolted the rest in place except the tee which in volved the tee and cutting some rubber line and the massage of the one presssure line as shown in the link to the cedar crest speed and here. If the pedal wouldn't have been different I might have gone vacuum.
Title: Re: Hydroboost Conversion
Post by: TURBOPOWERED68 on May 18 2014, 10:37:55 AM
Have you priced that setup? I don't know about you but I have a wife, four children and a mortgage. It didn't even come close to my budget.


That reserve ain't much imo. I have a Suburban and a pickup with that setup. I've had the burb chuck a tensioner pulley and you are in no power steering and no power brake land in a hurry.

I am on the same micro budget boat as you, I chose that picture at random just to show the reserve not the "kit "it self.
I also get that once the belt goes south the brakes follow in a hurry but one more push on the brakes can make a big difference as i personally experienced on my Astro.

Anyways thanks for posting this up as it's coming up on my to do list. Thanks for the pictures and step by step   
Title: Re: Hydroboost Conversion
Post by: TexasT on May 19 2014, 02:04:29 PM
You get as many "pushes" as you want. The brakes don't quit, the power assist quits.
Title: Re: Hydroboost Conversion
Post by: TurboCajun on May 19 2014, 11:10:47 PM
yes the hydro boost in already in the car and I am installing the 87 PS and Reservoir. just wanting to know how to run the lines
Title: Re: Hydroboost Conversion
Post by: TexasT on May 21 2014, 04:03:35 PM
So, you are removing a pump that has a pressure and two returns(one from steering box and one from hb unit), right?

I can take more pix of mine but it pretty much runs in a circle(kinda). From the pump it goes to the hb, then from hb down to the steering box(these are pressure lines), then from the steering box to the tee, and from the hb to the tee, then to the reservoir, then from the reservoir to the pump. Your new pump has only a pressure and return right?
Title: Re: Hydroboost Conversion
Post by: dyermullet on June 07 2015, 10:28:55 PM
86-87 cars use a different pump than 84-85.

Here is a general diagram of HB routing I borrowed from pirate 4x4
(http://www.pirate4x4.com/tech/billavista/Brakes/images/Vanco6.jpg)
http://www.pirate4x4.com/tech/billavista/Brakes/ (http://www.pirate4x4.com/tech/billavista/Brakes/)
Title: Re: Hydroboost Conversion
Post by: GavinHunyady on July 07 2015, 02:54:13 PM
Fo those of you that have done the conversion, does the pedal feel dead prior to purging the air from the hydraulic boost circuit? (p/s fluid side)
 
I'm bleeding the brakes prior to starting the engine for the first time with the new hydroboost setup and I hardly have any pedal feel. I was wondering if I should run the p/s pump with a drill motor to purge the air? pedal is super squish
Title: Re: Hydroboost Conversion
Post by: TexasT on July 07 2015, 08:27:42 PM
I jacked up the front, and with fluid ready we started the engine. We watched the reservoir and added as bubbles came up. We went lock to lock with the sterring, and added more fluid to the reservoir. Then we went lock to lock several more times and added fluid to keep it topped off. When we could go lock to lock on the steering without seeing any bubbles in the reservoir we deemed it bled and moved on to bleeding the brakes.

Bleeding the brakes took a little more effort as my car had sat with a blown head gasket for a decade or so. The brakes had really old fluid so we deemed it necessary to bleed until it came out clear fluid and essentially flushed the system. We started with the pass rear but there was so much crud it kept stopping up the bleeder. I removed the bleeder several times to clean it out, but eventually we got clear fluid and were able to move on to the driver rear. You must make sure to keep the master cylinder topped off. It isn't rocket science but there are things that must be adhered to or you must start over when you run the system dry and I think many don't and end up with a spongy pedal and air in the system.
Title: Re: Hydroboost Conversion
Post by: GavinHunyady on July 08 2015, 09:32:45 AM
my point is that I havent started the engine (for the first time) yet... so I'm trying to bleed the brakes and the pedal feels totally dead. I cant imagine that there is that much air in the system and I'm getting clear fluid with no air at the wheel cylinders.
Title: Re: Hydroboost Conversion
Post by: TexasT on July 08 2015, 10:41:08 PM
Ill push my pedal in the am and see what it feels like. If you are getting fluid with no bubbles I would think it is bled. When are You planning to bust off the new engine?
Title: Re: Hydroboost Conversion
Post by: GavinHunyady on July 08 2015, 11:01:58 PM
within the next week, racing Friday and Saturday with the sprint car, so no GN work for a couple nights. I have about 1 more day of wiring and getting the WB02 installed. After that we should be good for a fire, break-in and leak check. Still need to fab an exhaust and get the alky pump rebuilt/replaced and if all goes well it should be time to tune before the employee car show on the 24th.
Title: Re: Hydroboost Conversion
Post by: TexasT on September 13 2018, 05:36:38 PM
All right.


It appears as the master cylinder has or is failing. I knew it wasn't in good shape as it would do magic when cold out and make fluid disappear. Today we got the "red car" out and had to move the T to do it.


I hadn't driven it since replacing the front hoses and bleeding the system. Not sure, as I could have air in the system but I don't think so. I will admit we only bled the front but with the spongy pedal and it goes pretty much to the floor I'm leaning towards the mc.


MC not hard to swap. what I'm having trouble swallowing is the price of said MC. I put the cardone type 10-1740 on when I did this conversion but it seems these are NLA. I can find the listings with a web search but none seem to be actually available to order. So on to another search.


I did the search up for the Cadillac again and the rockauto.com comes with a different number but it looks real similar, well, except the price. Which is like 2.5 times more and about $62 shipped. OUCH!
Oh well, that is the price of stopping, so I am in in the next few weeks.
https://www.rockauto.com/en/moreinfo.php?pk=309537&cc=1025996&jsn=1286 (https://www.rockauto.com/en/moreinfo.php?pk=309537&cc=1025996&jsn=1286)
An up side is the thing looks like it doesn't use a retaining clip with the "eyes" that got in the way on the last MC I tried.


The results can be seen in the pic. That clip is suppose to be flat and hold the guts of the mc in. The HB unit got caught on the clip and bent it something fierce. Oh and that is my GS in the back ground(brown with the white top), yes, it really does exist, haha.
Title: Re: Hydroboost Conversion
Post by: TexasT on October 06 2018, 08:21:40 AM
Got the new mc on and bled it on the car. It takes a LOT of bleeding to get all the air out. I think this is why people have probs with a spongy pedal. Take the extra time and bleed it right and don't have air and a spongy pedal.


When bleeding the mc, I used the plugs that came in the kit but speedwaymotors .com sells a nice metal set if you must. https://www.speedwaymotors.com/Master-Cylinder-Plugs-1-2-20-9-16-18-Zinc-Finish,239113.html (https://www.speedwaymotors.com/Master-Cylinder-Plugs-1-2-20-9-16-18-Zinc-Finish,239113.html)


Either way you bolt it up, install the plugs and get to cycling the pedal. Nice easy short strokes. enough to get the air out but not to much and the fluid comes flying out of the reservoir. And when you think you have it all do it some more. And then some more as there are real Little bitty bubbles that come out and those my friends are air too. You don't even see them come to the surface, they just hang down there at the port and you don't see em unless you have tour safety glasses on and a helper manning the pedal. Yes, wear the safety glasses. You only have two eyes and brake fluid in one or both surely isn't fun, Yes I called you Shirley, better than Nancy right? Put the PPE on!


Once you have it bled you can hook up the lines. I was happy with the lines and didn't fool with anything down stream so I went ahead and did some driveway testing. After I was happy and thought they would stop the car, a brake stand and smoke show. Wife not pleased, neighbors were mixed, son loved it.


So long story short we have brakes again and I can get some insurance and head down to the local inspection station and get that out of the way and get some tags so I can drive it again. I'm pretty stoked.


Next project is the 85 Fiero my son bought, I didn't even get a chance to talk him down as him and his friend went and bought it. It is becoming a very big learning experience for him as now he cant get it to run and is throwing money at it. He has to learn these lessons.I just loan him tools and equipment. He tells me, sure it has fuel. I gave him the gauge and said with fuel injection it needs more than"some fuel" get a pressure and get back with me. Also gave him the noid light set and told him to carefully unplug each one and get the light to blink or I didn't believe the thing was signaling. So he tells me it has 20psi fuel pressure. I told him pinch the return line and see, and that is where he is. I think it is a fpr or bad pump. old cars are fun!
Title: Re: Hydroboost Conversion
Post by: gusszgs on October 06 2018, 08:46:14 AM
Nice👍
Glad you got the issue ironed out Rich.
Title: Re: Hydroboost Conversion
Post by: daveismissing on October 06 2018, 10:29:03 AM
Fiero-  4 banger or the 6?
Title: Re: Hydroboost Conversion
Post by: TexasT on October 06 2018, 11:20:35 AM
Six cylinder. 2.8l maybe. Regulator looked different in the pic he sent me. I just think it wont run on 20psi and he say the pump would prime to the 20psi and then pump stopped running and the pressure fell of until he cycled the key again.

Any ideas?

And yes Jim brakes are good!


Title: Re: Hydroboost Conversion
Post by: daveismissing on October 06 2018, 05:38:40 PM
"laymans" check of the fuel pressure  LOL
http://www.thefierofactory.com/qastumbles.php (http://www.thefierofactory.com/qastumbles.php)

If it is fuel injection one would expect similar values to the GN

Better: http://www.fierofocus.com/Tech%20Tips/Pdf%27s/Tech/fuel_pumps.pdf (http://www.fierofocus.com/Tech%20Tips/Pdf%27s/Tech/fuel_pumps.pdf)
Title: Re: Hydroboost Conversion
Post by: TexasT on October 06 2018, 08:12:10 PM
Thanks for the links. I'll do some studying and pass em along. 
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