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Looking for street/canyon carving COILOVER kits

Hi everyone I was wondering if you can point me in the right direction on some parts I am looking for.
Car: 1987 911 Carrera Cabriolet
I am looking for a street/canyon carver coilover kit. The google was not very helpful today and the ones I did find were ones you had to piece together. Ideally I wanted the KW V2 coilover system but it looks like they don't even make it for my car. Am I missing something? why am I finding very limited selection for coilover kits?
So again I am looking for a street/canyon carver setup and nothing race/track purpose
Thanks in advance for any help you guys can provide!

Old 08-01-2017, 10:33 PM
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Your 911 was designed around a torsion bar suspension (like F1 cars) and doesn't have the reinforcement at the points in the chassis where coil overs would apply their forces.
In the cases where torsion bars can't supply sufficient spring rates, coil overs are used but chassis reinforcement is done at the same time.

That is not to say that coil overs wouldn't be a fun "mod" but it explains why you don't see drop-in coil over replacements on the market.
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Old 08-01-2017, 11:45 PM
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Switching to coilovers isn't really a "bolt some parts on" modification. You are changing the car from all the weight being supported by the torsion bar mounts to supporting the car completely by the shock mounts.

The shock mounts are designed to deal with a pretty heavy load but that load is being upped by simply adding the weight of the car to it. Obviously in the rear this is a bigger issue because 60% of the car's weight is there. Search for "RSR shock tower modification" and you will see what welding and bracing is required.
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Old 08-02-2017, 12:14 AM
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There are thousands of 911's that are running coil overs with no issues. I have had coil overs on my 87 Carrera for six years, on road and track. No reinforcements done to the shock towers. On earlier models you need to reinforce the rear shock towers.
The advantage of coil overs vs torsion bars are that the coil overs are much easier to adjust for ride height and corner balancing, and unlike the torsion bars, the spring rates can be made progressive. The result is better handling and smoother ride.
I got my coil over suspension (Bilstein) from Rebel Racing. I was surprised by the fact that the pricing was about the same as for hollow torsion bars. No brainer for me!
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Old 08-02-2017, 09:30 AM
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Quote:
Originally Posted by Fly911 View Post
There are thousands of 911's that are running coil overs with no issues. I have had coil overs on my 87 Carrera for six years, on road and track. No reinforcements done to the shock towers. On earlier models you need to reinforce the rear shock towers.
The advantage of coil overs vs torsion bars are that the coil overs are much easier to adjust for ride height and corner balancing, and unlike the torsion bars, the spring rates can be made progressive. The result is better handling and smoother ride.
I got my coil over suspension (Bilstein) from Rebel Racing. I was surprised by the fact that the pricing was about the same as for hollow torsion bars. No brainer for me!
That interesting! A couple of decades ago I knew someone who switched to coil overs for his street/track car and he raved about how much nicer the ride was.

My current struts and rear shocks can accept coil over springs (Smart Racing Fox shocks). Did you get rid of the torsion bars and if so how? I wonder if I can go back to stock bars and add coil overs? The stock bars would most of the car weight that way.

Thanks.
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Last edited by ChrisBennet; 08-02-2017 at 10:31 AM..
Old 08-02-2017, 10:28 AM
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Quote:
Originally Posted by teflonjawn View Post
Hi everyone I was wondering if you can point me in the right direction on some parts I am looking for.
Car: 1987 911 Carrera Cabriolet
I am looking for a street/canyon carver coilover kit. The google was not very helpful today and the ones I did find were ones you had to piece together. Ideally I wanted the KW V2 coilover system but it looks like they don't even make it for my car. Am I missing something? why am I finding very limited selection for coilover kits?
So again I am looking for a street/canyon carver setup and nothing race/track purpose
Thanks in advance for any help you guys can provide!

If you have any part specific questions, please feel free to reach out to us at 888-280-7799 and one of our Porsche part specialists will be happy to answer any questions!
Old 08-02-2017, 10:32 AM
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Quote:
I knew someone who switched to coil overs for his street/track car and he raved about how much nicer the ride was.
I have considered going to coil overs on my 78 930 conversion. just picked up a set of coil over capable raised front spindle struts and front/rear re-valved bilstein shocks.

as commented, you can do it, but the tub just was not designed for coil overs. when discussing with Steve Weiner at Rennsport Systems, he relayed the comment above that he has heard before. in his opinion the 'nicer ride' is in part due to the flex in the car around the shock mounts due to the load.

although I love the idea of doing full coil over, suspect I'll stay with Tbars.
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Old 08-02-2017, 10:56 AM
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The swap from torsion bars to coil overs is an easy DIY job. Just pull out the torsion bars, and install the coil overs. The front control arms must be taken off to get the TB's out. You also need struts that can accommodate the coil springs. In the rear you need 935 style spring plates. For a DIY guy, this is done in an evening in your garage. The car must of course have a full alignment and corner balancing afterwards.
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Old 08-03-2017, 06:49 AM
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We do have the RSR coilover conversion kits here: 1987 Porsche 911 Carrera Convertible - Suspension Upgrades & Performance - Page 1. Could do some research on the forum to see how they provide a difference in performance for your 911. Although, it is a kit you have to piece together. I posted a thread below that might provide some good input as well. Good luck.

"87 911 suspension from torsion to coilovers, benefits?
Old 08-03-2017, 07:14 AM
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Quote:
Originally Posted by ChrisBennet View Post
A couple of decades ago I knew someone who switched to coil overs for his street/track car and he raved about how much nicer the ride was.
Naturally,.....that's because the body is flexing!
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Old 08-03-2017, 07:48 AM
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Quote:
Originally Posted by Steve@Rennsport View Post
Naturally,.....that's because the body is flexing!
And, for OP, I'm not sure a cab is the best platform to add coilovers to for the same reason. I had an 88 cab with stock refreshed suspension, slightly lowered, proper corner balance and alignment and never felt it under performed in rigorous canyon workouts.
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Old 08-03-2017, 08:02 AM
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Quote:
Originally Posted by Steve@Rennsport View Post
Naturally,.....that's because the body is flexing!
I questioned even writing the "you need to brace it" post.

I really felt it was like...
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Old 08-03-2017, 07:28 PM
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Quote:
Originally Posted by Fly911 View Post
There are thousands of 911's that are running coil overs with no issues. I have had coil overs on my 87 Carrera for six years, on road and track. No reinforcements done to the shock towers. On earlier models you need to reinforce the rear shock towers.
The advantage of coil overs vs torsion bars are that the coil overs are much easier to adjust for ride height and corner balancing, and unlike the torsion bars, the spring rates can be made progressive. The result is better handling and smoother ride.
I got my coil over suspension (Bilstein) from Rebel Racing. I was surprised by the fact that the pricing was about the same as for hollow torsion bars. No brainer for me!
Fly911 is correct. I have been running my JRZ coilovers (purchased from Kevin Buckler at TRG) for over 20 years now. Sans torsion bars. IIRC, 800lb springs in back, 600 up front? 930 turbo racecar. This car has seen its fair share of track time, as well as a ton of spirited driving. NO issues whatsoever on cracking of the shock towers. ( they are not reinforced). I do have a full cage in the car as well

Yes, if you have the engine out, it would be a good idea to add reinforcement to that area, but it is not a must do item, like most on here would lead you to believe.

Oh, and they are AWESOME!!! Not too hard of a ride, and the car is quite stiff. Very easy to corner balance as well as setting ride height. For me, it was a no brainer... DO IT!!!!! you will love it!

And remember, about 95% of the stuff you read on most internet forums is others talking out of their butt, or just repeating what they have read or heard with no first hand knowledge.
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Last edited by turbobrat930; 08-04-2017 at 05:03 AM..
Old 08-04-2017, 04:41 AM
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I'm going to take out my torsion bars in the rear after reading this in my 87. I have both torsion bars and coilovers. It'll rattle your teeth.
Old 08-04-2017, 05:06 AM
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teflonjawn - I'm running the KW V3 kit on mine that is not coilovers, but full adjustable shock replacements where you keep the torsion bars - mine are upgraded to larger diameter as well. The improvement in ride and adjustability is amazing. They have 4 settings to choose from and I run them on 2 for normal driving. Overall ride is much better with these.

http://www.kwsuspensions.com/classicporsche911
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Old 08-04-2017, 06:20 PM
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^^^^ 4 levels of adjustment?? Most KW products feature far more tuning adjustment...
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Old 08-04-2017, 07:24 PM
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Maybe it was a typo where he missed the 1 in 14...? I thought the KWs had about 14 steps in both compression and rebound adjustment.
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Old 08-04-2017, 08:14 PM
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Quote:
NO issues whatsoever on cracking of the shock towers. ( they are not reinforced). I do have a full cage in the car as well
full cage? exactly, that is what helps stiffen the entire body.

as a side note, I ran my 85 targa at DE for a while. when I installed a full bolt-in cage I was amazed at how much better the car felt/handled. almost as stiff as a coupe.

without a cage or other body reinforcement, loading all the car's weight on the shock mounts allow for a lot of body flex.

its your car ... do what you want. just hope you understand the trade offs.

I have had this debate with Steve Weiner a couple times and finally understood his point. I am still debating a full cage in my 930, but unless I do that I'll stick with Tbars.

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Old 08-05-2017, 05:44 AM
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Coilovers are pointless in a Cabriolet. It's just a bragging item at cars and coffee meets.
It's an 87. Spend your money restoring or moderately improving what the car came with.
If you really want a Canyon Carver get a different car to throw money at.
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Old 08-05-2017, 06:55 AM
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Another possible issue with rear coilovers - even using the smallest diameter Eibach springs - is clearance inside the shock tower. A partial interior skin may need to be welded in to give more clearance.

Old 08-06-2017, 06:06 PM
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