Brake caliper options
#1
Intermediate
Thread Starter
Join Date: Jul 2017
Location: San Bruno, CA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
Brake caliper options
I know the conventional wisdom is to just have whatever brake system/calipers that came with your 928 be in tip top shape, but what other Porsche calipers would fit a 1979 Non S/Base 928 whether it needed adapters or not?
I guess the first and cheapest route, aside from completely going through my system, would be to replace with S calipers. After that, what are other Porsche calipers that would fit even if they needed adapters?
I don't feel like I'm going the route of installing Big Blacks, just wanting to know more possible options.
Thanks
Bob
I guess the first and cheapest route, aside from completely going through my system, would be to replace with S calipers. After that, what are other Porsche calipers that would fit even if they needed adapters?
I don't feel like I'm going the route of installing Big Blacks, just wanting to know more possible options.
Thanks
Bob
#2
Rennlist Member
The most obvious upgrade must be to go for S4 calipers/discs with aftermarket adapters from our key 928 suppliers. The main items can also be obtained at reasonable pricing from someone upgrading to the GTS setup
#3
Rennlist Member
Join Date: Jan 2015
Location: Near Mushroom Capital of the World
Posts: 3,019
Received 198 Likes
on
125 Posts
I am also doing this on a '78. Make sure you get the correct front rotors (993) with the hat height offsets that will go with the S4 calipers/adapters. On the rear, all you need are some spacers to space out the calipers appropriately on the rotors.
#4
Rennlist Member
993 calipers fit with front adapters and some washers as spacers for the rears. As stated above, you need 993 front rotors and 928 rear rotors for this to work.
They are the later piston design so parts are easier to get. The front caliper piston sizes are the same for the S4 but the rear pistons are 20% larger.
I use them on my 81 and they are fantastic. They are also occasionally less expensive than 928 calipers.
They are the later piston design so parts are easier to get. The front caliper piston sizes are the same for the S4 but the rear pistons are 20% larger.
I use them on my 81 and they are fantastic. They are also occasionally less expensive than 928 calipers.
#5
Rennlist Member
Join Date: Jan 2015
Location: Near Mushroom Capital of the World
Posts: 3,019
Received 198 Likes
on
125 Posts
I am also doing this on a '78. Make sure you get the correct front rotors (993) with the hat height offsets that will go with the S4 calipers/adapters. On the rear, all you need are some spacers to space out the calipers appropriately on the rotors.
Do a google search: "Porsche 928 S4 calipers on OB rennlist" and you will get almost all the info that you need.
good luck!
-Hoi
Do a google search: "Porsche 928 S4 calipers on OB rennlist" and you will get almost all the info that you need.
good luck!
-Hoi
#6
Intermediate
Thread Starter
Join Date: Jul 2017
Location: San Bruno, CA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
Thanks guys for the advice. What is confusing for me a little, is all the numerical designations Porsche assigned to their cars after awhile. I've had in my past 914, 911, 912, 912E, and 944, but when they started all the 993, 996, 997 numbers, they lost me, mostly because I never had such a newer car.
What would help is which calipers fit and, am I assuming correctly that all, or any, will need adapters? Again, I'm assuming all 928 calipers will fit, but am I only looking for 993 calipers or are their other options?
I see a lot of Boxster, Cayenne, Cayman calipers on eBay but have no idea if someone makes adapters for them and if they would work.
Bob
1979 928 Euro/RoW hopefully back on the road here in CA. soon.
What would help is which calipers fit and, am I assuming correctly that all, or any, will need adapters? Again, I'm assuming all 928 calipers will fit, but am I only looking for 993 calipers or are their other options?
I see a lot of Boxster, Cayenne, Cayman calipers on eBay but have no idea if someone makes adapters for them and if they would work.
Bob
1979 928 Euro/RoW hopefully back on the road here in CA. soon.
#7
Rennlist Member
Join Date: Jan 2015
Location: Near Mushroom Capital of the World
Posts: 3,019
Received 198 Likes
on
125 Posts
Many Rennlisters have done this upgrade, so spend a little of time doing the search and there are plenty of info here. S4 brakes are more than enough for the speed/weight of the OB cars.
Here was a thread that I started and plenty here helped, so hopefully, this will help your cause:
https://rennlist.com/forums/928-foru...s4-brakes.html
-Hoi
Here was a thread that I started and plenty here helped, so hopefully, this will help your cause:
https://rennlist.com/forums/928-foru...s4-brakes.html
-Hoi
Trending Topics
#8
Rennlist Member
I did the "S" upgrade on the fronts because the rears are the same for S and non-S. Don't know if this will result in better braking but someone said that the S brakes are everything you need. I hope they are. Car isn't running yet.
#9
Burning Brakes
Bob:
I have a pair of good "S" calipers off of my '82 from when I did the S4 conversion if you're interested. I'm up in Santa Rosa
https://sfbay.craigslist.org/nby/pts...549387511.html
James
I have a pair of good "S" calipers off of my '82 from when I did the S4 conversion if you're interested. I'm up in Santa Rosa
https://sfbay.craigslist.org/nby/pts...549387511.html
James
#10
Intermediate
Thread Starter
Join Date: Jul 2017
Location: San Bruno, CA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
James, I was about to email you about your ad about an hour ago, but thought I'd scour the internet for other calipers or someone I thought would likely ship them to me.
I have no time to get up to Santa Rosa, so what would total for shipping and the calipers be?
Thanks
Bob
shipping to San Bruno, 94066 (Home of the YouTube shooting, about 5mins for my house)
I have no time to get up to Santa Rosa, so what would total for shipping and the calipers be?
Thanks
Bob
shipping to San Bruno, 94066 (Home of the YouTube shooting, about 5mins for my house)
#13
Intermediate
Thread Starter
Join Date: Jul 2017
Location: San Bruno, CA
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
James/jheis, Thanks for the offer, but after phoning the guys at 928Intn'l, I may go for the S4 calipers after I get my car back of the road. I rebuilt the existing calipers on the car (Non S) and new rotors and Hawk Pads. May like it as is, you never know.
Bob
Bob
#14
Do the S calipers bolt on with no modifications? Assume you need matching S rotors (discs)? Cheers, John
#15
Rennlist Member
Good luck
I might have a picture of this setup. I'll look around for it.