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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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