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> So, You want Boxster Calipers, under 15" wheels..., and you say you have 3" M struts eh?
craig downs
post Oct 28 2007, 04:17 PM
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Getting ready to drill the mounting holes showing the marks made by the transfer
punch.
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craig downs
post Oct 28 2007, 04:20 PM
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Drilling the holes
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Tapping the holes making sure the are square
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craig downs
post Oct 28 2007, 04:22 PM
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Caliper mounted to the strut
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craig downs
post Oct 28 2007, 04:27 PM
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Cutting off a little of the old mounting ears so the inboard pad will go all the down
in the caliper.
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craig downs
post Oct 28 2007, 04:34 PM
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Sorry messed up again this is the 1st time I have posted pics so I'm still learning.
Anyway the 2nd photo above the caliper is mounted with the pads and is ready to go.


Here is another one
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craig downs
post Oct 28 2007, 04:37 PM
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Here it is installed in the car
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Aaron Cox
post Oct 29 2007, 12:49 PM
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waiting on a tie rod end, and a pair of bolts - and then i will report how well these babies stop.

The total piston area of these is right about the same as a pair of A calipers (around 5% smaller actually), so there is no need to change the master cylinder to anything larger than a 19mm (IMG:style_emoticons/default/smile.gif)
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andys
post Oct 29 2007, 12:54 PM
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QUOTE(Aaron Cox @ Oct 29 2007, 11:49 AM) *

waiting on a tie rod end, and a pair of bolts - and then i will report how well these babies stop.

The total piston area of these is right about the same as a pair of A calipers (around 5% smaller actually), so there is no need to change the master cylinder to anything larger than a 19mm (IMG:style_emoticons/default/smile.gif)


What is the pad area compared to the A calipers?

Thanks,

Andys
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Aaron Cox
post Oct 29 2007, 01:05 PM
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between 1 and 2x as big (IMG:style_emoticons/default/smile.gif)

i dont actually know, i would guesstimate a bit under 2x as big.
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john rogers
post Oct 29 2007, 01:32 PM
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Would it be possible to not mill the strut mount where you do to get the edge to locate the adapter block and instead use the edge where you cut off the extra material as a locator? I would be interested to try this setup on the vintage 2.0L race car as I have a set of the 4 bolt hubs with vented rotors and a bit of additional brake ability is always nice. This would be a good real racing stress test I would think.
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Aaron Cox
post Oct 29 2007, 03:48 PM
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we havent looked at a 4cyl strut....

the ears must be cut to clear the pads
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Aaron Cox
post Oct 29 2007, 05:32 PM
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here are more facts about the swap of calipers vs A calipers.

http://members.rennlist.com/sjanes/brakes.htm
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Brando
post Oct 30 2007, 01:31 PM
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What do Boxster calipers usually run for a set of 4?

Also, when do we see pics for how you're modifiying the rear trailing arms to mount these?
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Aaron Cox
post Oct 30 2007, 04:15 PM
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rich johnson makes a simple bolt on adapter for the rear.
You can also mill some yourself if you are so inclined.

Boxster calipers usually run about 300 per axle... give or take.... on ebay.
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neo914-6
post Oct 30 2007, 05:24 PM
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Rich's fine work:

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He repainted the calipers for me.
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Brando
post Oct 30 2007, 06:08 PM
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What stopped you from using Boxster S calipers? Size? Cost?
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neo914-6
post Oct 30 2007, 06:38 PM
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QUOTE(Brando @ Oct 30 2007, 05:08 PM) *

What stopped you from using Boxster S calipers? Size? Cost?


If you're refering to my earlier plans, they would have fit in my 18's and I already had a pair. I didn't want to focus my time on prototyping them and Rich has proven adapters so I sold them.

If you're refering to use with 15", they are larger and less available so yes size and cost are a factor.
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TeenerTim
post Jan 11 2008, 08:36 AM
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How about an update?
Any idea of cost?
Would it be possible/easier to modify an existing 3.5" adapter to work on a 3" strut?
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Aaron Cox
post Jan 11 2008, 03:27 PM
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They stop on a dime and give ya change (IMG:style_emoticons/default/smile.gif)

cost? market rate on a PAIR of calipers is around 300 bucks
Machining time? Ask craig.... a few sixpacks and lots of time on the bridegport.

You cannot use a bolt on adapter, ad the ears of the strut interfere with the pad. THUS the ears were trimmed as you saw.

I am sure you could use a way bigger rotor, and make a bolt on adapter, requiring 16" wheels or larger. Try a 944 turbo rotor for that.
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So.Cal.914
post Jan 11 2008, 03:34 PM
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Nice Aaron. (IMG:style_emoticons/default/smile.gif)
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