Porsche 924S

[Danwvw]

Doing a Brake Job on my Porsche 924S and am wondering about what brake fluid and what grease and what brand of brake pads and rotors are good etc...
The Pelican forum does not seem to be getting any responses!
Front:

Rear:

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1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[Glenn]

Mintex pads
Front D 209 MTX (928 351 942 00)
Rear D 210 MTX(928 352 942 00)


Zimmerman rotors
Front 911 351 041 20 (911 351 041 20 SP cross drilled)
Rear 944 352 041 02

DOT4 brake fluid
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

[Danwvw]

Pads: Porterfield Racing R-4s Pads! (The R is for Racing the S is for street these pads are trimmed and a little smaller over their racing counterpart. They are said to be noticeably better than Stock.)
Yes Got the Zimmerman's,
Castrol Dot - 4.

I think I ordered an aluminum neutral grease.
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1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[Danwvw]

Anyone know anything about rear caliper assembly. I Don't know where to set the plunger rotation on my Rear Disc that has the caliper on the back side of the disc. Right now I have it set to zero the directions show two different setups one at Zero and one at 20'
Here is a photo of how it was but I may have had it wrong from a couple years ago when I cleaned and lubed it. This is the one that was hanging up too.

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1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[KTPhil]

i don't know for sure for your model, but ATE typically used an angle of 20 degrees as shown below:

Eyeballing, this looks like the same angle on my VW Type 3 pistons. I would guess ATE stuck with this measurement; I've seen it referenced for the 911, too.

[Danwvw]

Looks like it just goes such that the center of the raised part of the plunger press surface is centered right in the direction the rotor turns, makes sense! I will take a closer look at where the calipers mount when the e-brakes come and I can put it back together. Well I think you are right The calipers are positioned such that it would be centered at about 20' Degrees on the This Porsche, Only thing though is, I forgot and left it at 0' Degrees on the rear, I did set the front at 20' Degrees. We will see how it acts I better set the other rear side the same 0's when I do it tomorrow. Thanks
(Note! Everything is different with the Porsche than the diagrams above but the Idea is the same.)
Left Rear:

Left Front:

_________________
1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[Mike Fisher]

My 6X14 Zenith knockoff wire wheels were made for a 924 w/4X112 bolt pattern. I had them drilled for 4X130 too. Stacked in the barn w/tires waiting for a new owner w/$600.

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https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold

Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey

[oprn]

You are selling those wheel?

[Mike Fisher]

Yeah I'm running 2.0 liter Fuchs now, but I did run the Zenith wire wheels for 2-3 years.

_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold

Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey

[oprn]

Those wire wheels are sweet! If only I was closer or if there was some reasonable way to ship them...

Can tubeless tires be run on them?

[Mike Fisher]

I bought new tubes to run in tubeless tires because I didn't want any leaks!
_________________
https://imgur.com/user/FisherSquareback/posts
69 FI/AT square Daily Driver
66 sunroof,67,70,71,71,71AT,72,72AT,73 Parts
two 57 oval ragtops sold
'68 Karmann Ghia sold

Society is like stew. If you don't keep it stirred up you end up with a lot of scum on the top! - Russ_Wolfe/Edward Abbey

[Danwvw]

Hey, Mike, I think I talked to you once at Woodburn! The car you show is very nice looking with those. Yeah, they are for the bug too right, like a 68 or later?
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1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[oprn]

Those would look so good on my Manx copy Buggy. I have never seen a Buggy with wires either so it would stand out in a crowd for sure! The only issue is they are a little narrow to maintain the classic "bigs and littles" look.

[Danwvw]

[busdaddy]

The step angle has nothing to do with the caliper orientation on the axle, it's about angle of attack Vs: the disc's rotation, if the caliper is square to the disc (like in your pic) then I'd go with the 20*.
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[Danwvw]

What? That Type 3 Diagram above is square but the Porsche 924s calipers are positioned about 20' degrees up in front and 20' degrees down in the back.
By the way, Thanks for the reply. I have not had much experience with Disc Brakes and I am still thinking I should set the plungers straight Zero in line with the caliper which looks like it would place the plungers high edge trailing square on the rotors which would be correct in my thinking?
Left Front:

Left Rear:

_________________
1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[busdaddy]

Caliper position doesn't matter, it can be 2:00, 4:00, 8:00 or any place that fits, if you draw a line from the hub center out across the caliper it will always be 90* to the pads, and each end of the caliper frame will be equally spaced away from the rotor edge. No matter where the caliper is positioned it's pads are still oriented parallel to the discs rotation, the step in the piston optimizes pad contact or squeeze to that angle, not where the caliper is mounted and should be 20* off from that imaginary line.

Put them in any way you like, I'm sure it'll stop, but I suspect it stops best when the pistons are oriented correctly.

I've always found it strange that Porsche didn't use the retainer plates like buses do (at least that's what Porsche "experts" tell me and I've never found any installed), I can never get a good answer when I do brakes on them. But why bother stepping the piston if it doesn't work better situated a certain way?
_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

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[Danwvw]

I see what you're saying. So 20's CW from zero on both? That would put them pressing further out on the disc right?
_________________
1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[busdaddy]

Yes, with the stepped down section facing the oncoming disc in normal driving direction.
_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

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[ToolBox]