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Join Date: Oct 2001
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Cool 928 brake upgrade

Ok probably getting out of hand here but I was crawling around under my 78 928 and decided that I should see what the mounting bolt spread is. 3" the same as my 914/6 struts. Going to sit and play real soon to see if these single piston floating calipers could move on to a lighter car. been looking for an excuse to upgrade to S4 brakes on the beast anyway. Who will be 1st to tell me it won't work.
74 2.0 Alaska Blue Metallic
78 928 5 speed faded silver.
Old 11-05-2001, 03:02 PM
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I don't know who will tell you if it won't work, but I'll be the first to request pics after you find out that it does. Better brakes on the teen would be nice.

Dave
1970 914-6
looking to buy a 928 S4 or GT
Old 11-05-2001, 03:50 PM
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Where you gonna get the power assist?

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CWP/VIR
72 914 L20E in rusto.
73 914 L20E 2.0L in resto.
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Old 11-05-2001, 05:40 PM
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Well Power assist would be nice but Definatley won't fit unless I cut a hole in fire wall and then graft in a 928 fire wall. NOT WORTH IT. So the question is would I need Power Assist? Have to look at past articles of Excellence but the silver car W/ 3.8L motor had S4 brakes all the way around. I do have the 78 928 Master Cylinder measure like 21MM. Real long and one outlet is at front end of unit. Reading the article about hydraulic brake upgrades, very enlightening.
Old 11-05-2001, 05:55 PM
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How big is the single piston?

I'm guessing it aint 0ver 80mm, which would be the equivilent of 2 pistons in a 914 caliper (I think they are something like 40).

However, the pressure does go up with the square of the diameter or the other way around. You may not need any assist after all.

I just thought that 928's had a power assist, they offer a "Brake Booster" in the catalog.


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CWP/VIR
72 914 L20E in rusto.
73 914 L20E 2.0L in resto.
a914lover73@hotmail.com
Old 11-05-2001, 08:05 PM
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Wink

try this..
http://www.pelicanparts.com/ultimate/Forum2/HTML/002701.html

the volvo brakes have been working well.. and i'm up to 14psi..
Old 11-05-2001, 08:05 PM
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SC brakes are power assist/boosted...they work on a 914....
Old 11-05-2001, 08:28 PM
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I just thought...

I don't do brakes. I would rather leave the liability to someone else.

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72 914 L20E in rusto.
73 914 L20E 2.0L in resto.
a914lover73@hotmail.com
Old 11-05-2001, 09:24 PM
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Oredith: so putting 2 and 2 together those are 4 piston calipers from what Volvo. Thats even better than my brain storm.
What kind of spacers do you need to use tp put those 15x6 phone dials. Just for kicks I tried to put my 16x7 under and it wasn't even close.
Old 11-06-2001, 04:14 AM
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Brought back from the past. I was playing around again with the 928 and 914/6 struts. Well as some others have said anything is possible. But is it worth it?
Here is what I found as you know the rotors on 928 are huge in diameter but about the same thickness as 914/6. The Single piston floating caliper would bolt to the spindle and looks like it would closely align to a rotor. (Don't have 914/6 rotors yet) It also looks like I could put a larger dia. rotor inplace of the 6.
Anyway, I am looking to close a deal for 928 "S" brakes so it will give me some time to play later. Happy turkey day.
Old 11-22-2001, 05:51 AM
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I have just ordered some new Zimmerman cross drilled rotors (front &rear) for my 914/6. I will be selling the old ones along with the front calipers.......

Anyone interested?
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Old 11-22-2001, 07:32 AM
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