PCA SDR

I want to upgrade the front struts on my '71 911 to a strut that has the pin type ball joint clamp and one that has 3.5" caliper spacing AND one that I can RAISE the spindle and use externally adjutable shocks.
A Koni strut from a '72 or newer seems to fit the bill.
Problem is I can't find any externally adjustable shock inserts listed anywhere. Are these NLA?

Thanks,
Gordon
#56

I believe they are. I think Stoddard has them. I have one, if you can find a mate.

John

Gordon-

I would call Jason at Paragon Products and ask him. He is very up to date on the Koni product line for early 911s.
http://www.paragon-products.com/aboutus.asp

TT

I wrote an article about this conversion back in 2001
http://www.dietersmotorsports.com/tech/ ... ersion.htm

I think I have a set of these shocks hidden in my secret stash of goodies... I will check.

Thanks all. Koni's web site does not have externally adjustable or sport shocks listed. Only classics and "gas" sports. Maybe if I new the part number?
Steve, thanks, let me know if you come across them. No big hurry.
BTW Steve I tried to email you at techadviser and it came back undeliverable.

Gordon

O.K. after some more searching it appears that Koni used the same insert in their 911 struts from 69 to 74. Externally adjustable inserts for those years seem to be NLA. There is an externally adjustable sport shock listed for 911s 75 to 89 with Koni struts. It appears I'll have to look for the newer style struts.

Thanks,
Gordon

Steve, after reading your article, I have two questions.

1. Are the older struts, with the clamp on ball joint attachment worth using for track work?

2. I read that the newer style strut inserts had treads on the outside of the strut, not the inside like the old ones, you didn't mention that in your article.

Thanks,
Gordon

Koni makes generic racing strut inserts and I installed them in my 914/6's 'S' struts 250 years ago, so I can't remember which part numbers I used.

Once I measured things, and figured out what strut I needed, only a spacer at the bottom of the shock needed to be machined up and the correct top nut purchased from Koni and I was in business.

Koni racing inserts here: http://www.koniracing.com/8611.cfm

Edit: BTW, if you want to raise the spindle on your S strut, find someone to use EDM to burn out the weld, it works perfectly to leave a nice hole for a new weld.

gocart wrote:Steve, after reading your article, I have two questions.

1. Are the older struts, with the clamp on ball joint attachment worth using for track work?

2. I read that the newer style strut inserts had treads on the outside of the strut, not the inside like the old ones, you didn't mention that in your article.

Thanks,
Gordon

The later strut and ball joint are much stronger for track work and stiff suspension and sticky tires
But it really depends on the condition of the early unit.

If you use a late insert in an early strut you just use the original cap.

Well, lets see, I have the original Boge struts that have been modified by raising the spindle one inch (yes it can be done). I have had the ball joint clamps come loose in the past. Just loose not falling off. I drilled and tapped the clamp for a larger bolt.
I still think that upgrading to newer struts is in my future.

Any one have a set of '72 -'77 knoi struts laying around?

The problem with the nut or "cap" as you call it is my struts don't have them. I have Koni red inserts. There is no cap. The actual insert is threaded (male) and the whole insert screws into the strut. I guess when I find some new struts I'll be able to find the correct cap or nut.

Thanks all.
Gordon

gocart wrote: The problem with the nut or "cap" as you call it is my struts don't have them. I have Koni red inserts. There is no cap. The actual insert is threaded (male) and the whole insert screws into the strut. I guess when I find some new struts I'll be able to find the correct cap or nut.

Thanks all.
Gordon

The Koni racing catalog I cited with the .url above has 6 different top nuts shown in 5 metric and 1 Whitworth thread, one of them is probably what you need.

gocart wrote:Well, lets see, I have the original Boge struts that have been modified by raising the spindle one inch (yes it can be done). I have had the ball joint clamps come loose in the past. Just loose not falling off. I drilled and tapped the clamp for a larger bolt.
I still think that upgrading to newer struts is in my future.

Any one have a set of '72 -'77 knoi struts laying around?

The problem with the nut or "cap" as you call it is my struts don't have them. I have Koni red inserts. There is no cap. The actual insert is threaded (male) and the whole insert screws into the strut. I guess when I find some new struts I'll be able to find the correct cap or nut.

Thanks all.
Gordon

Gordon,
Those are really old inserts you have... all the new ones come with threaded caps. If you need something you don't have let me know...
I tend to collect stuff like that and even know where that particular box is located.

Seriously, Steve, if you have some externally adjustable strut inserts you want to unload let me know.
I found some '73 Koni struts on Pelican.

Also I am looking for a good running SC motor.

Thanks,
Gordon

I think I'm set. I've got some '73 Koni struts, some Koni 8641 1039sport externally adjustable inserts, and the ever elusive gland nut 73.25.01.011.1.
Here is my '73 koni strut and the 1039sport insert.

Here is the correct (and obscure) gland nut, 73.25.01.011.1

And assembled...

Strange that Koni tech told me that I would have to replace my struts with Boges in order to run the 1039sport inserts. At paragon's web site these inserts are also listed as for Boges only.



Gordon

That's interesting, in the list I cited above, that Koni part number 73.25.01.011.1 is the one with the British Whitworth thread .