924Board.org

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

Will a 9inch booster + master cylinder fit instead of a 7inch brake booster and mater cylinder. Anyone know pls?

dreamgts
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2 PORSCHE 924 (CURRENT PROJECTS)
2 CLASSIC CORTINAS (FINISHED)
1 CLASSIC FIAT(FINISHED)
1 CLASSIC FIAT 132 2000CC(JUST PURCHASED)
4 SUV'S
2 SEDANS
1 OPEL PANEL VAN
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fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Yes, they were used on the 924 Turbo. I'm using one now on my 924 (albeit with a sidedraft intake) If you think about it, the 2 inch diameter change only causes 1" less room on the intake side.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

So I can install the whole unit instead of the 7inch unit then. Im also confused about the hydraulic piping since they differ on the master cylinder, any ideas? The 2 inch diameter difference is no problem then.

dreamgts
_________________
2 PORSCHE 924 (CURRENT PROJECTS)
2 CLASSIC CORTINAS (FINISHED)
1 CLASSIC FIAT(FINISHED)
1 CLASSIC FIAT 132 2000CC(JUST PURCHASED)
4 SUV'S
2 SEDANS
1 OPEL PANEL VAN
WIFES SUZUKI ALTO

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Yeah, that's why I had to replace all of the hard lines on my car.

There are some good threads on that here. I think there was one master cylinder available from the 79 924 with the 4-wheel disc option that would work with the old style brake line routing, but I'm cheap and my labor is free so I changed my car to match the 80 and later cars to use 944 parts

_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

Thanks Fiat I know where I stand now and probably know what is needed to be done. The easiest way out therefore is to service the existing master cylinder on the 79 model in my case, leaving the 7 inch brake booster in its place too.

dreamgts
_________________
2 PORSCHE 924 (CURRENT PROJECTS)
2 CLASSIC CORTINAS (FINISHED)
1 CLASSIC FIAT(FINISHED)
1 CLASSIC FIAT 132 2000CC(JUST PURCHASED)
4 SUV'S
2 SEDANS
1 OPEL PANEL VAN
WIFES SUZUKI ALTO

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Well, if you're staying with the stock brakes, yes.

If you're moving to 4-wheel discs? No.

If you're building a race car? I'd ditch the booster and use a racing master cylinder setup with an adjustable bias bar.

Otherwise, 924 turbo/944 parts seem to work well for dual purpose use (at least at first, most find they have to move closer to racing brake solutions as they add more and more tire under the car)
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

So you reckon it would be a better idea If I ditch the 7inch booster and go for the 9inch booster and master cylinder? Regarding the hydralic pipes to fit the master cylinder, are they an easy fit or a PITA to fit? Do I have to change anything else like calipers disc brake hubs etc?

dreamgts
_________________
2 PORSCHE 924 (CURRENT PROJECTS)
2 CLASSIC CORTINAS (FINISHED)
1 CLASSIC FIAT(FINISHED)
1 CLASSIC FIAT 132 2000CC(JUST PURCHASED)
4 SUV'S
2 SEDANS
1 OPEL PANEL VAN
WIFES SUZUKI ALTO