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> '73 3.0l conversion suspension and parking breat suggestions, Need advice from the World!
mlw914
post May 8 2026, 05:37 PM
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Hello 914W,

I am going to update the suspension in my '73 914 6 conversion. It's got a 3.0l in it, dual PMO's, Cayman 4 piston calipers and 911 discs, 321 ignition, Patrick Motorsports conversion kit and front oil cooler kit, running 16" Ultralights to accommodate the brake rotors. Sway bars F & R as well.

I am doing some suspension upgrades and wanted suggestions on what suspension components you all would suggest. I am leaning towards Bilstein units but not sure.

I also wanted to know from those with more experience and knowledge regarding the parking brake setup. Obviously with the Cayman calipers I can't use the old system and its gone. What have you done or seen done to allow for an e brake? Don't get me wrong, my $7 Harbor Freight wheel chock is working great, just not an ideal setup. I have heard of compression lock systems and modern electric options but don't have any specifics so please, bring it on!

Much thanks!

Mike in NorCal
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Ninja
post May 8 2026, 06:03 PM
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Ground Control rear springs/adjustable perches.
I like the Koni parts due to adjustability and warranty.
Many prefer Billies...

Mod rear trailing arms for early 911 parking brake assemblies.
Tangerine Racing makes cable adaptors to allow 914 stock E-brake cables to work.

I'm planning on strengthening the suspension points, adjustable tension rods to inner rear trailing arm mount.

Adjustable/triangulated outer rear suspension mount plate (improves the strength and makes rear alignment easier).

What front strut housings you are using may dictate which insert you can use.

Your car sounds nice!

Look at Tangerine Racing, Elephant Racing, PMB websites if you haven't yet.

Welcome to the forum!
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wndsrfr
post May 8 2026, 07:52 PM
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Maybe try this.....Wilwood Spot Brake....
you'll have to engineer mounting and cable routing....YMMV
https://www.wilwood.com/Calipers/CaliperProd?itemno=120-1360
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Steve
post May 8 2026, 08:28 PM
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Always check the how to forum
http://www.914world.com/bbs2/index.php?showtopic=4909
I used the above info and early 911 shoe emergency brake. Make sure you weld an angle iron to the trailing arm to keep the shoes from braking loose during an emergency stop. There’s a reason why the factory did it with 911’s.
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mlw914
post May 8 2026, 08:58 PM
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QUOTE(Ninja @ May 8 2026, 07:03 PM) *

Ground Control rear springs/adjustable perches.
I like the Koni parts due to adjustability and warranty.
Many prefer Billies...

Mod rear trailing arms for early 911 parking brake assemblies.
Tangerine Racing makes cable adaptors to allow 914 stock E-brake cables to work.

I'm planning on strengthening the suspension points, adjustable tension rods to inner rear trailing arm mount.

Adjustable/triangulated outer rear suspension mount plate (improves the strength and makes rear alignment easier).

What front strut housings you are using may dictate which insert you can use.

Your car sounds nice!

Look at Tangerine Racing, Elephant Racing, PMB websites if you haven't yet.

Welcome to the forum!


Thanks for the info and welcom! Much appreciated, Mike
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mlw914
post May 8 2026, 08:59 PM
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QUOTE(wndsrfr @ May 8 2026, 08:52 PM) *

Maybe try this.....Wilwood Spot Brake....
you'll have to engineer mounting and cable routing....YMMV
https://www.wilwood.com/Calipers/CaliperProd?itemno=120-1360



Much thanks! Appreciate the help.

Mike
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porschetub
post May 9 2026, 12:07 AM
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QUOTE(Steve @ May 9 2026, 02:28 PM) *

Always check the how to forum
http://www.914world.com/bbs2/index.php?showtopic=4909
I used the above info and early 911 shoe emergency brake. Make sure you weld an angle iron to the trailing arm to keep the shoes from braking loose during an emergency stop. There’s a reason why the factory did it with 911’s.

(IMG:style_emoticons/default/agree.gif) not sure about fitting the 40mm spacer to the backing plate as per the link you supplied ,its real not heavy enough IMO to support and emergency handbrake stop if needed .
Trailing arm mounting is best and thats how mine is done now ,cheers.
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mlindner
post May 9 2026, 05:34 AM
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Ground Control, any spring rate you want. I'm running 150 lb in the rear with a 2,2 six. Attached Image
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mepstein
post May 9 2026, 06:16 AM
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QUOTE(wndsrfr @ May 8 2026, 09:52 PM) *

Maybe try this.....Wilwood Spot Brake....
you'll have to engineer mounting and cable routing....YMMV
https://www.wilwood.com/Calipers/CaliperProd?itemno=120-1360

Wilwood has a mounting plate for their spot brakes. They have a whole kit for their rear brakes with ebrake. It’s $1k for the rear calipers and another $1k to add the ebrake.
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sixnotfour
post May 9 2026, 07:02 AM
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FYI..
https://www.youtube.com/watch?v=u839QfQeBj8
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Montreal914
post May 9 2026, 08:55 AM
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In the video, not sure I understand his drilled rear rotors (4 to 5 lugs) as these are vented disks... (IMG:style_emoticons/default/confused24.gif)
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mepstein
post May 9 2026, 10:36 AM
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QUOTE(Montreal914 @ May 9 2026, 10:55 AM) *

In the video, not sure I understand his drilled rear rotors (4 to 5 lugs) as these are vented disks... (IMG:style_emoticons/default/confused24.gif)

I saw a couple of his videos as week ago. I only half paid attention since some of what he was saying and doing didn’t make much sense to me. Just because it’s on YouTube doesn’t make it right.
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sixnotfour
post May 9 2026, 11:56 AM
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ya its not the best vocal thought proccess,, But.. He had the 4 lug set up drilled to 5 lug ......simple .. the rest is show...at least he has done it ....they dont sell a 5 lug kit for 914s.. the 911 kits ive seen are nicely packaged and go instructions...bolt on..
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porschetub
post May 9 2026, 05:31 PM
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QUOTE(sixnotfour @ May 10 2026, 01:02 AM) *

FYI..
https://www.youtube.com/watch?v=u839QfQeBj8

That video is corrupted ,don't try to play it ,took me 30mins to get my laptop working again and to say I was pissed off was an understatement ...it should be removed from this thread .
I had to power on and off till HP surestart kicked it ..rant over.
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sixnotfour
post May 9 2026, 08:52 PM
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Anyone else ??

QUOTE
That video is corrupted ,don't try to play it ,took me 30mins to get my laptop working again and to say I was pissed off was an understatement ...it should be removed from this thread .
I had to power on and off till HP surestart kicked it ..rant over.
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Superhawk996
post May 10 2026, 05:23 AM
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QUOTE(sixnotfour @ May 9 2026, 10:52 PM) *

Anyone else ??

QUOTE
That video is corrupted ,don't try to play it ,took me 30mins to get my laptop working again and to say I was pissed off was an understatement ...it should be removed from this thread .
I had to power on and off till HP surestart kicked it ..rant over.


Video works fine.

Porschetub is in New Zealand . . . Maybe all the 1’s and 0’s flip flopped when crossing into the southern hemisphere (IMG:style_emoticons/default/confused24.gif) (IMG:style_emoticons/default/laugh.gif)
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Superhawk996
post May 10 2026, 05:23 AM
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QUOTE(mepstein @ May 9 2026, 12:36 PM) *

QUOTE(Montreal914 @ May 9 2026, 10:55 AM) *

In the video, not sure I understand his drilled rear rotors (4 to 5 lugs) as these are vented disks... (IMG:style_emoticons/default/confused24.gif)

I saw a couple of his videos as week ago. I only half paid attention since some of what he was saying and doing didn’t make much sense to me. Just because it’s on YouTube doesn’t make it right.

(IMG:style_emoticons/default/agree.gif)
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sixnotfour
post May 10 2026, 06:58 AM
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This the one that shows the whole kit...turn volume of enjoy the kit visual... (IMG:style_emoticons/default/beerchug.gif)
https://www.youtube.com/watch?v=yVZT9-_3LfQ

I was thinking about it ,but went with Boxster brakes and 911 handbrake.....center lever.... REDRUM
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mepstein
post May 10 2026, 07:16 AM
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QUOTE(sixnotfour @ May 10 2026, 08:58 AM) *

This the one that shows the whole kit...turn volume of enjoy the kit visual... (IMG:style_emoticons/default/beerchug.gif)
https://www.youtube.com/watch?v=yVZT9-_3LfQ

I was thinking about it ,but went with Boxster brakes and 911 handbrake.....center lever.... REDRUM


Looked at the video again. Wilwood makes 5 lug rear disks. He just bought the kit for 4 lug. I don't know if they are willing to make a 5 lug kit but I would have asked them before buying the 4 lug kit or just simply bought the parts separately. My dealings with Wilwood have been great and they seem to be willing to work with the customer.

I just bought the front and rear calipers since I'm using the tangerine kit to add 911 rear e-brakes/center lever to the car.

We've bought a couple 911 caliper kits from Wilwood. They work great. They are a bit more expensive than Boxster brakes but are new vs used/rebuilt. By the time you have Boxster calipers rebuilt and repainted and buy the adaptors and hardware, the price is similar and turn around is days vs weeks.
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sixnotfour
post May 10 2026, 09:27 AM
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I Agree,,,but some people have have Porsh brakes.. (IMG:style_emoticons/default/beer.gif)
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