- Mar 7, 2002
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I just pulled the trigger on a late-model Prius booster/master assembly for $61.10 shipped, so we'll see if it can be made to fit.
The Tragic Tale of ElSuperPinto
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It was cheaper than the manual conversion kit from LMR.Woohoo!! I hope this works out.
The best part is we all have wasted more than $62.00 on stupidfor our cars.
I realize you've grabbed a Prius unit, but what about something like this? It just popped up in my Amazon suggestions since I was looking at that kind of stuff the other day. But the way I see it with this unit, you might have to cut into your firewall a little and recess the mount. I'm sure the same could be done with a stocker, but it looks like one of these wouldn't be so deep. And with the backside in a conical shape, you may not have to cut as big a hole as you would a stocker. 
Amazon product ASIN B01M636629View: https://www.amazon.com/dp/B01M636629/ref=cm_sw_r_cp_apa_i_bwrtFb68RRWND
Amazon product ASIN B01M636629View: https://www.amazon.com/dp/B01M636629/ref=cm_sw_r_cp_apa_i_bwrtFb68RRWND
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11" in diameter? No way that's clearing, even with a recess.I realize you've grabbed a Prius unit, but what about something like this? It just popped up in my Amazon suggestions since I was looking at that kind of stuff the other day. But the way I see it with this unit, you might have to cut into your firewall a little and recess the mount. I'm sure the same could be done with a stocker, but it looks like one of these wouldn't be so deep. And with the backside in a conical shape, you may not have to cut as big a hole as you would a stocker.
Amazon product ASIN B01M636629View: https://www.amazon.com/dp/B01M636629/ref=cm_sw_r_cp_apa_i_bwrtFb68RRWND
I was looking at that pic you shared and thinking that the depth would actually place the booster behind the valve cover. If that would be the case it might fit...?
Or this one? Same idea, thin enough to mount behind the valve cover? I did a quick search to see if I could find dimensions but had no luck. Again, just a thought if you can't make the Prius stuff work like you want.
Amazon product ASIN B082F7YRBLView: https://www.amazon.com/dp/B082F7YRBL/ref=cm_sw_r_cp_apa_i_QLrtFb04SGNH5
Amazon product ASIN B082F7YRBLView: https://www.amazon.com/dp/B082F7YRBL/ref=cm_sw_r_cp_apa_i_QLrtFb04SGNH5
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Those are junk, I've replaced several on those SUVs.
If I can make the Prius unit fit, it'll work. The wiring is a simple matter of finding the (+) and (-) for the booster circuit, and if it's not designed for continuous power, a simple relay with it's trigger terminal piggybacked to the stoplight switch will allow it to power on and off with the brake pedal.
@CarMichael Angelo Should come see what other Prius
he can put on his car! https://rover.ebay.com/rover/1/711-...0001&campid=5335821607&icep_item=193310544834
I mean, look at the little guy. Sure he's not the prettiest thing, but look at how tiny it is, and it's already designed for four-wheel-discs, and it integrates virtually everything into one unit... It just might work. Looks a lot better than a hydroboost unit too!
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The top 2/3 of the picture is what all is included in the Prius booster/master assembly I bought. I need to look at the electrical side of things too, so I can see just what connections I do and don't need to make. I know this unit's controller has a fail-safe mode to provide a certain amount of assist, just like the electric power steering in the Prius (in fact, that's how Mike and so many others use that system, by intentionally putting it into fail-safe mode so that it can run without using CAN-BUS data from other systems), and that may be adequate (or more than), but there's also the remote possibility of getting it to work at full power if I can figure out what I need to do to convince it that it is in a Prius with no faults.
There's also two other possibilities:
1. I can do as mentioned before, and just provide power straight to the booster pump either continuously or via a relay.
2. The damned thing won't work for me at all.
I will probably end up needing to mount this thing and connect it to the brake system just to test it... Or go grab a couple of junkyard brake parts and use a battery to tinker with it on the workbench at the shop.
This is getting interesting...
- Mar 7, 2002
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- Mar 7, 2002
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That awkward moment when you realize your daily driver had the answer under its hood all along...
@Mustang5L5 is doing a hydro-boost in a Fox. He might have asked some of the same things you're asking.
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Not doing hydro-boost, doing electric boost. The Prius booster/master was dropped off at the house today, can't wait to get there and find out what a bitch it's going to be to make it work.
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That's okay, until I opened the hood on the 4Runner today out of boredom at work it never occured to me that my 4Runner uses an electric brake booster. The Prius unit is much narrower (and much longer, but that shouldn't be a big issue). It showed up today, it looks good, I'm going to take it to the shop tomorrow and look up wiring and pinout info on Alldata to see if I can't figure out what makes that little monster tick.
My EGR block-off plate for the Lincoln intake also arrived today, I sent a PM to Mike about those injectors he's had for sale in the classifieds, waiting to hear back, and I have a junkyard trip planned for a list of parts including the valve covers, COPs, oil pan and pickup tube, alternator, and more.
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I like the 4Runner unit more, because it incorporates the ABS, booster, and master all into one compact and robust assembly, but the Prius one should be better for retrofitting into the II precisely because it omits the ABS.
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Back to square one on brakes.
I talked to a Toyota master tech friend of mine for a bit today about the crazy idea of using the Prius master. He was able to explain why it wouldn't work.
Manual swap!
I talked to a Toyota master tech friend of mine for a bit today about the crazy idea of using the Prius master. He was able to explain why it wouldn't work.
Manual swap!
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